This makes it somewhat more aggressive, so this is kind-of a [breaking-change] for these compiling with `#[deny(unused_mut)]`.
r? @pnkfelix
memory safety and offers painless concurrency ([no data races]).
It does not employ a garbage collector and has minimal runtime overhead.
-This repo contains the code for `rustc`, the Rust compiler, as well
+This repo contains the code for the compiler (`rustc`), as well
as standard libraries, tools and documentation for Rust.
[no data races]: http://blog.rust-lang.org/2015/04/10/Fearless-Concurrency.html
CFG_OSTYPE=unknown-openbsd
;;
+ NetBSD)
+ CFG_OSTYPE=unknown-netbsd
+ ;;
+
Darwin)
CFG_OSTYPE=apple-darwin
;;
--- /dev/null
+# x86_64-unknown-netbsd configuration
+CC_x86_64-unknown-netbsd=$(CC)
+CXX_x86_64-unknown-netbsd=$(CXX)
+CPP_x86_64-unknown-netbsd=$(CPP)
+AR_x86_64-unknown-netbsd=$(AR)
+CFG_LIB_NAME_x86_64-unknown-netbsd=lib$(1).so
+CFG_STATIC_LIB_NAME_x86_64-unknown-netbsd=lib$(1).a
+CFG_LIB_GLOB_x86_64-unknown-netbsd=lib$(1)-*.so
+CFG_LIB_DSYM_GLOB_x86_64-unknown-netbsd=$(1)-*.dylib.dSYM
+CFG_JEMALLOC_CFLAGS_x86_64-unknown-netbsd := -I/usr/local/include $(CFLAGS)
+CFG_GCCISH_CFLAGS_x86_64-unknown-netbsd := -Wall -Werror -g -fPIC -I/usr/local/include $(CFLAGS)
+CFG_GCCISH_LINK_FLAGS_x86_64-unknown-netbsd := -shared -fPIC -g -pthread -lrt
+CFG_GCCISH_DEF_FLAG_x86_64-unknown-netbsd := -Wl,--export-dynamic,--dynamic-list=
+CFG_LLC_FLAGS_x86_64-unknown-netbsd :=
+CFG_INSTALL_NAME_x86_64-unknown-netbsd =
+CFG_EXE_SUFFIX_x86_64-unknown-netbsd :=
+CFG_WINDOWSY_x86_64-unknown-netbsd :=
+CFG_UNIXY_x86_64-unknown-netbsd := 1
+CFG_LDPATH_x86_64-unknown-netbsd :=
+CFG_RUN_x86_64-unknown-netbsd=$(2)
+CFG_RUN_TARG_x86_64-unknown-netbsd=$(call CFG_RUN_x86_64-unknown-netbsd,,$(2))
+CFG_GNU_TRIPLE_x86_64-unknown-netbsd := x86_64-unknown-netbsd
("ios", "ios"),
("linux", "linux"),
("mingw32", "windows"),
+ ("netbsd", "netbsd"),
("openbsd", "openbsd"),
("win32", "windows"),
("windows", "windows"),
-% The (old) Rust Pointer Guide
+% The Rust Pointer Guide
-This content has moved into
-[the Rust Programming Language book](book/pointers.html).
+This content has been removed, with no direct replacement. Rust only
+has two built-in pointer types now,
+[references](book/references-and-borrowing.html) and [raw
+pointers](book/raw-pointers.html). Older Rusts had many more pointer
+types, they’re gone now.
[rbe]: http://rustbyexample.com/
+# The Standard Library
+
+We have [API documentation for the entire standard
+library](std/index.html). There's a list of crates on the left with more
+specific sections, or you can use the search bar at the top to search for
+something if you know its name.
+
# Community & Getting Help
If you need help with something, or just want to talk about Rust with others,
* [Project FAQ](complement-project-faq.html)
* [How to submit a bug report](https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports)
-# The Standard Library
-
-We have [API documentation for the entire standard
-library](std/index.html). There's a list of crates on the left with more
-specific sections, or you can use the search bar at the top to search for
-something if you know its name.
-
# The Error Index
If you encounter an error while compiling your code you may be able to look it
as a configuration itself, like `unix` or `windows`.
* `target_os = "..."`. Operating system of the target, examples include
`"windows"`, `"macos"`, `"ios"`, `"linux"`, `"android"`, `"freebsd"`, `"dragonfly"`,
- `"bitrig"` or `"openbsd"`.
+ `"bitrig"` , `"openbsd"` or `"netbsd"`.
* `target_pointer_width = "..."`. Target pointer width in bits. This is set
to `"32"` for targets with 32-bit pointers, and likewise set to `"64"` for
64-bit pointers.
* [Macros that work together](https://www.cs.utah.edu/plt/publications/jfp12-draft-fcdf.pdf)
* [Traits: composable units of behavior](http://scg.unibe.ch/archive/papers/Scha03aTraits.pdf)
* [Alias burying](http://www.cs.uwm.edu/faculty/boyland/papers/unique-preprint.ps) - We tried something similar and abandoned it.
-* [External uniqueness is unique enough](http://www.computingscience.nl/research/techreps/repo/CS-2002/2002-048.pdf)
+* [External uniqueness is unique enough](http://www.cs.uu.nl/research/techreps/UU-CS-2002-048.html)
* [Uniqueness and Reference Immutability for Safe Parallelism](https://research.microsoft.com/pubs/170528/msr-tr-2012-79.pdf)
* [Region Based Memory Management](http://www.cs.ucla.edu/~palsberg/tba/papers/tofte-talpin-iandc97.pdf)
* [Dynamic circular work stealing deque](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.170.1097&rep=rep1&type=pdf) - The Chase/Lev deque
* [Work-first and help-first scheduling policies for async-finish task parallelism](http://www.cs.rice.edu/%7Eyguo/pubs/PID824943.pdf) - More general than fully-strict work stealing
* [A Java fork/join calamity](http://www.coopsoft.com/ar/CalamityArticle.html) - critique of Java's fork/join library, particularly its application of work stealing to non-strict computation
-* [Scheduling techniques for concurrent systems](http://www.ece.rutgers.edu/%7Eparashar/Classes/ece572-papers/05/ps-ousterhout.pdf)
+* [Scheduling techniques for concurrent systems](http://www.stanford.edu/~ouster/cgi-bin/papers/coscheduling.pdf)
* [Contention aware scheduling](http://www.blagodurov.net/files/a8-blagodurov.pdf)
* [Balanced work stealing for time-sharing multicores](http://www.cse.ohio-state.edu/hpcs/WWW/HTML/publications/papers/TR-12-1.pdf)
-* [Three layer cake](http://www.upcrc.illinois.edu/workshops/paraplop10/papers/paraplop10_submission_8.pdf)
+* [Three layer cake for shared-memory programming](http://dl.acm.org/citation.cfm?id=1953616&dl=ACM&coll=DL&CFID=524387192&CFTOKEN=44362705)
* [Non-blocking steal-half work queues](http://www.cs.bgu.ac.il/%7Ehendlerd/papers/p280-hendler.pdf)
* [Reagents: expressing and composing fine-grained concurrency](http://www.mpi-sws.org/~turon/reagents.pdf)
* [Algorithms for scalable synchronization of shared-memory multiprocessors](https://www.cs.rochester.edu/u/scott/papers/1991_TOCS_synch.pdf)
```
This code generates documentation that looks [like this][rc-new]. I've left the
-implementation out, with a regular comment in its place. That's the first thing
-to notice about this annotation: it uses `///`, instead of `//`. The triple slash
+implementation out, with a regular comment in its place.
+
+The first thing to notice about this annotation is that it uses
+`///` instead of `//`. The triple slash
indicates a documentation comment.
Documentation comments are written in Markdown.
$ cargo test
```
-That's right, `cargo test` tests embedded documentation too. However,
+That's right, `cargo test` tests embedded documentation too. However,
`cargo test` will not test binary crates, only library ones. This is
due to the way `rustdoc` works: it links against the library to be tested,
but with a binary, there’s nothing to link to.
because this is not a sanctioned way of performing linking. Right now rustc
shells out to the system linker, so it makes sense to provide extra command line
arguments, but this will not always be the case. In the future rustc may use
-LLVM directly to link native libraries in which case `link_args` will have no
+LLVM directly to link native libraries, in which case `link_args` will have no
meaning.
It is highly recommended to *not* use this attribute, and rather use the more
the borrow ‘doesn’t live long enough’ because it’s not valid for the right
amount of time.
-The same problem occurs when the reference is declared _before_ the variable it refers to:
+The same problem occurs when the reference is declared _before_ the variable it
+refers to. This is because resources within the same scope are freed in the
+opposite order they were declared:
```rust,ignore
let y: &i32;
println!("{}", y);
}
```
+
+In the above example, `y` is declared before `x`, meaning that `y` lives longer
+than `x`, which is not allowed.
download_unpack_base = os.path.join(download_dir_base, "unpack")
snapshot_files = {
+ "bitrig": ["bin/rustc"],
+ "dragonfly": ["bin/rustc"],
+ "freebsd": ["bin/rustc"],
"linux": ["bin/rustc"],
"macos": ["bin/rustc"],
- "winnt": ["bin/rustc.exe"],
- "freebsd": ["bin/rustc"],
- "dragonfly": ["bin/rustc"],
- "bitrig": ["bin/rustc"],
+ "netbsd": ["bin/rustc"],
"openbsd": ["bin/rustc"],
+ "winnt": ["bin/rustc.exe"],
}
winnt_runtime_deps_32 = ["libgcc_s_dw2-1.dll", "libstdc++-6.dll"]
return "dragonfly"
if os_name == "bitrig":
return "bitrig"
+ if os_name == "netbsd":
+ return "netbsd"
if os_name == "openbsd":
return "openbsd"
return "linux"
use core::mem;
use core::nonzero::NonZero;
use core::ops::{Deref, CoerceUnsized};
+use core::ptr;
use core::marker::Unsize;
use core::hash::{Hash, Hasher};
+use core::usize;
use heap::deallocate;
/// An atomically reference counted wrapper for shared state.
unsafe impl<T: ?Sized + Sync + Send> Send for Weak<T> { }
unsafe impl<T: ?Sized + Sync + Send> Sync for Weak<T> { }
+impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Weak<U>> for Weak<T> {}
+
#[stable(feature = "rust1", since = "1.0.0")]
impl<T: ?Sized + fmt::Debug> fmt::Debug for Weak<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
struct ArcInner<T: ?Sized> {
strong: atomic::AtomicUsize,
+
+ // the value usize::MAX acts as a sentinel for temporarily "locking" the
+ // ability to upgrade weak pointers or downgrade strong ones; this is used
+ // to avoid races in `make_unique` and `get_mut`.
weak: atomic::AtomicUsize,
+
data: T,
}
#[unstable(feature = "arc_weak",
reason = "Weak pointers may not belong in this module.")]
pub fn downgrade(&self) -> Weak<T> {
- // See the clone() impl for why this is relaxed
- self.inner().weak.fetch_add(1, Relaxed);
- Weak { _ptr: self._ptr }
+ loop {
+ // This Relaxed is OK because we're checking the value in the CAS
+ // below.
+ let cur = self.inner().weak.load(Relaxed);
+
+ // check if the weak counter is currently "locked"; if so, spin.
+ if cur == usize::MAX { continue }
+
+ // NOTE: this code currently ignores the possibility of overflow
+ // into usize::MAX; in general both Rc and Arc need to be adjusted
+ // to deal with overflow.
+
+ // Unlike with Clone(), we need this to be an Acquire read to
+ // synchronize with the write coming from `is_unique`, so that the
+ // events prior to that write happen before this read.
+ if self.inner().weak.compare_and_swap(cur, cur + 1, Acquire) == cur {
+ return Weak { _ptr: self._ptr }
+ }
+ }
}
/// Get the number of weak references to this value.
#[deprecated(since = "1.2.0", reason = "renamed to Arc::strong_count")]
pub fn strong_count<T: ?Sized>(this: &Arc<T>) -> usize { Arc::strong_count(this) }
-
-/// Returns a mutable reference to the contained value if the `Arc<T>` is unique.
-///
-/// Returns `None` if the `Arc<T>` is not unique.
-///
-/// This function is marked **unsafe** because it is racy if weak pointers
-/// are active.
-///
-/// # Examples
-///
-/// ```
-/// # #![feature(arc_unique, alloc)]
-/// extern crate alloc;
-/// # fn main() {
-/// use alloc::arc::{Arc, get_mut};
-///
-/// # unsafe {
-/// let mut x = Arc::new(3);
-/// *get_mut(&mut x).unwrap() = 4;
-/// assert_eq!(*x, 4);
-///
-/// let _y = x.clone();
-/// assert!(get_mut(&mut x).is_none());
-/// # }
-/// # }
-/// ```
-#[inline]
-#[unstable(feature = "arc_unique")]
-#[deprecated(since = "1.2.0",
- reason = "this function is unsafe with weak pointers")]
-pub unsafe fn get_mut<T: ?Sized>(this: &mut Arc<T>) -> Option<&mut T> {
- // FIXME(#24880) potential race with upgraded weak pointers here
- if Arc::strong_count(this) == 1 && Arc::weak_count(this) == 0 {
- // This unsafety is ok because we're guaranteed that the pointer
- // returned is the *only* pointer that will ever be returned to T. Our
- // reference count is guaranteed to be 1 at this point, and we required
- // the Arc itself to be `mut`, so we're returning the only possible
- // reference to the inner data.
- let inner = &mut **this._ptr;
- Some(&mut inner.data)
- } else {
- None
- }
-}
-
#[stable(feature = "rust1", since = "1.0.0")]
impl<T: ?Sized> Clone for Arc<T> {
/// Makes a clone of the `Arc<T>`.
/// Make a mutable reference from the given `Arc<T>`.
///
/// This is also referred to as a copy-on-write operation because the inner
- /// data is cloned if the reference count is greater than one.
- ///
- /// This method is marked **unsafe** because it is racy if weak pointers
- /// are active.
+ /// data is cloned if the (strong) reference count is greater than one. If
+ /// we hold the only strong reference, any existing weak references will no
+ /// longer be upgradeable.
///
/// # Examples
///
/// # #![feature(arc_unique)]
/// use std::sync::Arc;
///
- /// # unsafe {
/// let mut five = Arc::new(5);
///
- /// let mut_five = five.make_unique();
- /// # }
+ /// let mut_five = Arc::make_unique(&mut five);
/// ```
#[inline]
#[unstable(feature = "arc_unique")]
- #[deprecated(since = "1.2.0",
- reason = "this function is unsafe with weak pointers")]
- pub unsafe fn make_unique(&mut self) -> &mut T {
- // FIXME(#24880) potential race with upgraded weak pointers here
+ pub fn make_unique(this: &mut Arc<T>) -> &mut T {
+ // Note that we hold both a strong reference and a weak reference.
+ // Thus, releasing our strong reference only will not, by itself, cause
+ // the memory to be deallocated.
//
- // Note that we hold a strong reference, which also counts as a weak
- // reference, so we only clone if there is an additional reference of
- // either kind.
- if self.inner().strong.load(SeqCst) != 1 ||
- self.inner().weak.load(SeqCst) != 1 {
- *self = Arc::new((**self).clone())
+ // Use Acquire to ensure that we see any writes to `weak` that happen
+ // before release writes (i.e., decrements) to `strong`. Since we hold a
+ // weak count, there's no chance the ArcInner itself could be
+ // deallocated.
+ if this.inner().strong.compare_and_swap(1, 0, Acquire) != 1 {
+ // Another srong pointer exists; clone
+ *this = Arc::new((**this).clone());
+ } else if this.inner().weak.load(Relaxed) != 1 {
+ // Relaxed suffices in the above because this is fundamentally an
+ // optimization: we are always racing with weak pointers being
+ // dropped. Worst case, we end up allocated a new Arc unnecessarily.
+
+ // We removed the last strong ref, but there are additional weak
+ // refs remaining. We'll move the contents to a new Arc, and
+ // invalidate the other weak refs.
+
+ // Note that it is not possible for the read of `weak` to yield
+ // usize::MAX (i.e., locked), since the weak count can only be
+ // locked by a thread with a strong reference.
+
+ // Materialize our own implicit weak pointer, so that it can clean
+ // up the ArcInner as needed.
+ let weak = Weak { _ptr: this._ptr };
+
+ // mark the data itself as already deallocated
+ unsafe {
+ // there is no data race in the implicit write caused by `read`
+ // here (due to zeroing) because data is no longer accessed by
+ // other threads (due to there being no more strong refs at this
+ // point).
+ let mut swap = Arc::new(ptr::read(&(**weak._ptr).data));
+ mem::swap(this, &mut swap);
+ mem::forget(swap);
+ }
+ } else {
+ // We were the sole reference of either kind; bump back up the
+ // strong ref count.
+ this.inner().strong.store(1, Release);
}
+
// As with `get_mut()`, the unsafety is ok because our reference was
// either unique to begin with, or became one upon cloning the contents.
- let inner = &mut **self._ptr;
- &mut inner.data
+ unsafe {
+ let inner = &mut **this._ptr;
+ &mut inner.data
+ }
}
}
+impl<T: ?Sized> Arc<T> {
+ /// Returns a mutable reference to the contained value if the `Arc<T>` is unique.
+ ///
+ /// Returns `None` if the `Arc<T>` is not unique.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// # #![feature(arc_unique, alloc)]
+ /// extern crate alloc;
+ /// # fn main() {
+ /// use alloc::arc::Arc;
+ ///
+ /// let mut x = Arc::new(3);
+ /// *Arc::get_mut(&mut x).unwrap() = 4;
+ /// assert_eq!(*x, 4);
+ ///
+ /// let _y = x.clone();
+ /// assert!(Arc::get_mut(&mut x).is_none());
+ /// # }
+ /// ```
+ #[inline]
+ #[unstable(feature = "arc_unique")]
+ pub fn get_mut(this: &mut Arc<T>) -> Option<&mut T> {
+ if this.is_unique() {
+ // This unsafety is ok because we're guaranteed that the pointer
+ // returned is the *only* pointer that will ever be returned to T. Our
+ // reference count is guaranteed to be 1 at this point, and we required
+ // the Arc itself to be `mut`, so we're returning the only possible
+ // reference to the inner data.
+ unsafe {
+ let inner = &mut **this._ptr;
+ Some(&mut inner.data)
+ }
+ } else {
+ None
+ }
+ }
+
+ /// Determine whether this is the unique reference (including weak refs) to
+ /// the underlying data.
+ ///
+ /// Note that this requires locking the weak ref count.
+ fn is_unique(&mut self) -> bool {
+ // lock the weak pointer count if we appear to be the sole weak pointer
+ // holder.
+ //
+ // The acquire label here ensures a happens-before relationship with any
+ // writes to `strong` prior to decrements of the `weak` count (via drop,
+ // which uses Release).
+ if self.inner().weak.compare_and_swap(1, usize::MAX, Acquire) == 1 {
+ // Due to the previous acquire read, this will observe any writes to
+ // `strong` that were due to upgrading weak pointers; only strong
+ // clones remain, which require that the strong count is > 1 anyway.
+ let unique = self.inner().strong.load(Relaxed) == 1;
+
+ // The release write here synchronizes with a read in `downgrade`,
+ // effectively preventing the above read of `strong` from happening
+ // after the write.
+ self.inner().weak.store(1, Release); // release the lock
+ unique
+ } else {
+ false
+ }
+ }
+}
+
+#[inline]
+#[unstable(feature = "arc_unique")]
+#[deprecated(since = "1.2", reason = "use Arc::get_mut instead")]
+pub fn get_mut<T: ?Sized>(this: &mut Arc<T>) -> Option<&mut T> {
+ Arc::get_mut(this)
+}
+
#[stable(feature = "rust1", since = "1.0.0")]
impl<T: ?Sized> Drop for Arc<T> {
/// Drops the `Arc<T>`.
// fetch_add because once the count hits 0 it must never be above 0.
let inner = self.inner();
loop {
- let n = inner.strong.load(SeqCst);
+ // Relaxed load because any write of 0 that we can observe
+ // leaves the field in a permanently zero state (so a
+ // "stale" read of 0 is fine), and any other value is
+ // confirmed via the CAS below.
+ let n = inner.strong.load(Relaxed);
if n == 0 { return None }
- let old = inner.strong.compare_and_swap(n, n + 1, SeqCst);
+
+ // Relaxed is valid for the same reason it is on Arc's Clone impl
+ let old = inner.strong.compare_and_swap(n, n + 1, Relaxed);
if old == n { return Some(Arc { _ptr: self._ptr }) }
}
}
/// ```
#[inline]
fn clone(&self) -> Weak<T> {
- // See comments in Arc::clone() for why this is relaxed
+ // See comments in Arc::clone() for why this is relaxed. This can use a
+ // fetch_add (ignoring the lock) because the weak count is only locked
+ // where are *no other* weak pointers in existence. (So we can't be
+ // running this code in that case).
self.inner().weak.fetch_add(1, Relaxed);
- Weak { _ptr: self._ptr }
+ return Weak { _ptr: self._ptr }
}
}
// If we find out that we were the last weak pointer, then its time to
// deallocate the data entirely. See the discussion in Arc::drop() about
// the memory orderings
+ //
+ // It's not necessary to check for the locked state here, because the
+ // weak count can only be locked if there was precisely one weak ref,
+ // meaning that drop could only subsequently run ON that remaining weak
+ // ref, which can only happen after the lock is released.
if self.inner().weak.fetch_sub(1, Release) == 1 {
atomic::fence(Acquire);
unsafe { deallocate(ptr as *mut u8,
let mut cow1 = cow0.clone();
let mut cow2 = cow1.clone();
- assert!(75 == *cow0.make_unique());
- assert!(75 == *cow1.make_unique());
- assert!(75 == *cow2.make_unique());
+ assert!(75 == *Arc::make_unique(&mut cow0));
+ assert!(75 == *Arc::make_unique(&mut cow1));
+ assert!(75 == *Arc::make_unique(&mut cow2));
- *cow0.make_unique() += 1;
- *cow1.make_unique() += 2;
- *cow2.make_unique() += 3;
+ *Arc::make_unique(&mut cow0) += 1;
+ *Arc::make_unique(&mut cow1) += 2;
+ *Arc::make_unique(&mut cow2) += 3;
assert!(76 == *cow0);
assert!(77 == *cow1);
assert!(75 == *cow2);
unsafe {
- *cow0.make_unique() += 1;
+ *Arc::make_unique(&mut cow0) += 1;
}
assert!(76 == *cow0);
assert!(75 == *cow1_weak.upgrade().unwrap());
unsafe {
- *cow0.make_unique() += 1;
+ *Arc::make_unique(&mut cow0) += 1;
}
assert!(76 == *cow0);
impl<T: ?Sized> !marker::Send for Weak<T> {}
impl<T: ?Sized> !marker::Sync for Weak<T> {}
+impl<T: ?Sized+Unsize<U>, U: ?Sized> CoerceUnsized<Weak<U>> for Weak<T> {}
+
#[unstable(feature = "rc_weak",
reason = "Weak pointers may not belong in this module.")]
impl<T: ?Sized> Weak<T> {
// option. This file may not be copied, modified, or distributed
// except according to those terms.
+#![deprecated(reason = "BitVec and BitSet have been migrated to cargo as bit-vec and bit-set",
+ since = "1.3.0")]
+#![unstable(feature = "collections", reason = "deprecated")]
+#![allow(deprecated)]
+
// FIXME(Gankro): BitVec and BitSet are very tightly coupled. Ideally (for
// maintenance), they should be in separate files/modules, with BitSet only
// using BitVec's public API. This will be hard for performance though, because
//! This allows multiple actual types to be formatted via `{:x}` (like `i8` as
//! well as `isize`). The current mapping of types to traits is:
//!
-//! * *nothing* ⇒ `Display`
-//! * `?` ⇒ `Debug`
-//! * `o` ⇒ `Octal`
-//! * `x` ⇒ `LowerHex`
-//! * `X` ⇒ `UpperHex`
-//! * `p` ⇒ `Pointer`
-//! * `b` ⇒ `Binary`
-//! * `e` ⇒ `LowerExp`
-//! * `E` ⇒ `UpperExp`
+//! * *nothing* ⇒ [`Display`](trait.Display.html)
+//! * `?` ⇒ [`Debug`](trait.Debug.html)
+//! * `o` ⇒ [`Octal`](trait.Octal.html)
+//! * `x` ⇒ [`LowerHex`](trait.LowerHex.html)
+//! * `X` ⇒ [`UpperHex`](trait.UpperHex.html)
+//! * `p` ⇒ [`Pointer`](trait.Pointer.html)
+//! * `b` ⇒ [`Binary`](trait.Binary.html)
+//! * `e` ⇒ [`LowerExp`](trait.LowerExp.html)
+//! * `E` ⇒ [`UpperExp`](trait.UpperExp.html)
//!
//! What this means is that any type of argument which implements the
//! `fmt::Binary` trait can then be formatted with `{:b}`. Implementations
//! should always be printed.
//! * '-' - Currently not used
//! * '#' - This flag is indicates that the "alternate" form of printing should
-//! be used. For array slices, the alternate form omits the brackets.
-//! For the integer formatting traits, the alternate forms are:
+//! be used. The alternate forms are:
+//! * `#?` - pretty-print the `Debug` formatting
//! * `#x` - precedes the argument with a "0x"
//! * `#X` - precedes the argument with a "0x"
-//! * `#t` - precedes the argument with a "0b"
+//! * `#b` - precedes the argument with a "0b"
//! * `#o` - precedes the argument with a "0o"
//! * '0' - This is used to indicate for integer formats that the padding should
//! both be done with a `0` character as well as be sign-aware. A format
//!
//! There are three possible ways to specify the desired `precision`:
//!
-//! There are three possible ways to specify the desired `precision`:
-//! 1. An integer `.N`,
-//! 2. an integer followed by dollar sign `.N$`, or
-//! 3. an asterisk `.*`.
+//! 1. An integer `.N`:
+//!
+//! the integer `N` itself is the precision.
+//!
+//! 2. An integer followed by dollar sign `.N$`:
//!
-//! The first specification, `.N`, means the integer `N` itself is the precision.
+//! use format *argument* `N` (which must be a `usize`) as the precision.
//!
-//! The second, `.N$`, means use format *argument* `N` (which must be a `usize`) as the precision.
+//! 3. An asterisk `.*`:
//!
-//! Finally, `.*` means that this `{...}` is associated with *two* format inputs rather than one:
-//! the first input holds the `usize` precision, and the second holds the value to print. Note
-//! that in this case, if one uses the format string `{<arg>:<spec>.*}`, then the `<arg>` part
-//!
refers to the *value* to print, and the `precision` must come in the input preceding `<arg>`.
+//! `.*` means that this `{...}` is associated with *two* format inputs rather than one: the
+//! first input holds the `usize` precision, and the second holds the value to print. Note that
+//! in this case, if one uses the format string `{<arg>:<spec>.*}`, then the `<arg>` part refers
+//!
to the *value* to print, and the `precision` must come in the input preceding `<arg>`.
//!
//! For example, these:
//!
#[cfg(test)] extern crate test;
pub use binary_heap::BinaryHeap;
+#[allow(deprecated)]
pub use bit_vec::BitVec;
+#[allow(deprecated)]
pub use bit_set::BitSet;
pub use btree_map::BTreeMap;
pub use btree_set::BTreeSet;
#[unstable(feature = "bitvec", reason = "RFC 509")]
pub mod bit_vec {
+ #![allow(deprecated)]
pub use bit::{BitVec, Iter};
}
#[unstable(feature = "bitset", reason = "RFC 509")]
pub mod bit_set {
+ #![allow(deprecated)]
pub use bit::{BitSet, Union, Intersection, Difference, SymmetricDifference};
pub use bit::SetIter as Iter;
}
/// Creates a new `String` from a length, capacity, and pointer.
///
- /// This is unsafe because:
+ /// # Unsafety
///
- /// * We call `Vec::from_raw_parts` to get a `Vec<u8>`;
+ /// This is _very_ unsafe because:
+ ///
+ /// * We call `Vec::from_raw_parts` to get a `Vec<u8>`. Therefore, this
+ /// function inherits all of its unsafety, see [its
+ /// documentation](../vec/struct.Vec.html#method.from_raw_parts)
+ /// for the invariants it expects, they also apply to this function.
/// * We assume that the `Vec` contains valid UTF-8.
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
/// Creates a `Vec<T>` directly from the raw components of another vector.
///
- /// This is highly unsafe, due to the number of invariants that aren't checked.
+ /// # Unsafety
+ ///
+ /// This is highly unsafe, due to the number of invariants that aren't
+ /// checked:
+ ///
+ /// * `ptr` needs to have been previously allocated via `String`/`Vec<T>`
+ /// (at least, it's highly likely to be incorrect if it wasn't).
+ /// * `capacity` needs to be the capacity that the pointer was allocated with.
+ ///
+ /// Violating these may cause problems like corrupting the allocator's
+ /// internal datastructures.
///
/// # Examples
///
#[should_panic]
fn test_split_at_boundscheck() {
let s = "ศไทย中华Việt Nam";
- let (a, b) = s.split_at(1);
+ s.split_at(1);
}
#[test]
Match (4, 6),
Reject(6, 7),
]);
+ make_test!(str_searcher_ascii_haystack_seq, "bb", "abbcbbbbd", [
+ Reject(0, 1),
+ Match (1, 3),
+ Reject(3, 4),
+ Match (4, 6),
+ Match (6, 8),
+ Reject(8, 9),
+ ]);
make_test!(str_searcher_empty_needle_ascii_haystack, "", "abbcbbd", [
Match (0, 0),
Reject(0, 1),
// option. This file may not be copied, modified, or distributed
// except according to those terms.
-//! Traits for dynamic typing of any `'static` type (through runtime reflection)
-//!
//! This module implements the `Any` trait, which enables dynamic typing
//! of any `'static` type through runtime reflection.
//!
//! `Any` itself can be used to get a `TypeId`, and has more features when used
//! as a trait object. As `&Any` (a borrowed trait object), it has the `is` and
//! `as_ref` methods, to test if the contained value is of a given type, and to
-//! get a reference to the inner value as a type. As`&mut Any`, there is also
+//! get a reference to the inner value as a type. As `&mut Any`, there is also
//! the `as_mut` method, for getting a mutable reference to the inner value.
//! `Box<Any>` adds the `move` method, which will unwrap a `Box<T>` from the
//! object. See the extension traits (`*Ext`) for the full details.
unsafe { atomic_swap(self.v.get(), val, order) > 0 }
}
- /// Stores a value into the bool if the current value is the same as the expected value.
+ /// Stores a value into the `bool` if the current value is the same as the `current` value.
///
- /// The return value is always the previous value. If it is equal to `old`, then the value was
- /// updated.
+ /// The return value is always the previous value. If it is equal to `current`, then the value
+ /// was updated.
///
- /// `swap` also takes an `Ordering` argument which describes the memory ordering of this
- /// operation.
+ /// `compare_and_swap` also takes an `Ordering` argument which describes the memory ordering of
+ /// this operation.
///
/// # Examples
///
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
- pub fn compare_and_swap(&self, old: bool, new: bool, order: Ordering) -> bool {
- let old = if old { UINT_TRUE } else { 0 };
+ pub fn compare_and_swap(&self, current: bool, new: bool, order: Ordering) -> bool {
+ let current = if current { UINT_TRUE } else { 0 };
let new = if new { UINT_TRUE } else { 0 };
- unsafe { atomic_compare_and_swap(self.v.get(), old, new, order) > 0 }
+ unsafe { atomic_compare_and_swap(self.v.get(), current, new, order) > 0 }
}
/// Logical "and" with a boolean value.
unsafe { atomic_swap(self.v.get(), val, order) }
}
- /// Stores a value into the isize if the current value is the same as the expected value.
+ /// Stores a value into the `isize` if the current value is the same as the `current` value.
///
- /// The return value is always the previous value. If it is equal to `old`, then the value was
- /// updated.
+ /// The return value is always the previous value. If it is equal to `current`, then the value
+ /// was updated.
///
/// `compare_and_swap` also takes an `Ordering` argument which describes the memory ordering of
/// this operation.
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
- pub fn compare_and_swap(&self, old: isize, new: isize, order: Ordering) -> isize {
- unsafe { atomic_compare_and_swap(self.v.get(), old, new, order) }
+ pub fn compare_and_swap(&self, current: isize, new: isize, order: Ordering) -> isize {
+ unsafe { atomic_compare_and_swap(self.v.get(), current, new, order) }
}
/// Add an isize to the current value, returning the previous value.
unsafe { atomic_swap(self.v.get(), val, order) }
}
- /// Stores a value into the usize if the current value is the same as the expected value.
+ /// Stores a value into the `usize` if the current value is the same as the `current` value.
///
- /// The return value is always the previous value. If it is equal to `old`, then the value was
- /// updated.
+ /// The return value is always the previous value. If it is equal to `current`, then the value
+ /// was updated.
///
/// `compare_and_swap` also takes an `Ordering` argument which describes the memory ordering of
/// this operation.
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
- pub fn compare_and_swap(&self, old: usize, new: usize, order: Ordering) -> usize {
- unsafe { atomic_compare_and_swap(self.v.get(), old, new, order) }
+ pub fn compare_and_swap(&self, current: usize, new: usize, order: Ordering) -> usize {
+ unsafe { atomic_compare_and_swap(self.v.get(), current, new, order) }
}
/// Add to the current usize, returning the previous value.
unsafe { atomic_swap(self.p.get() as *mut usize, ptr as usize, order) as *mut T }
}
- /// Stores a value into the pointer if the current value is the same as the expected value.
+ /// Stores a value into the pointer if the current value is the same as the `current` value.
///
- /// The return value is always the previous value. If it is equal to `old`, then the value was
- /// updated.
+ /// The return value is always the previous value. If it is equal to `current`, then the value
+ /// was updated.
///
/// `compare_and_swap` also takes an `Ordering` argument which describes the memory ordering of
/// this operation.
/// ```
#[inline]
#[stable(feature = "rust1", since = "1.0.0")]
- pub fn compare_and_swap(&self, old: *mut T, new: *mut T, order: Ordering) -> *mut T {
+ pub fn compare_and_swap(&self, current: *mut T, new: *mut T, order: Ordering) -> *mut T {
unsafe {
- atomic_compare_and_swap(self.p.get() as *mut usize, old as usize,
+ atomic_compare_and_swap(self.p.get() as *mut usize, current as usize,
new as usize, order) as *mut T
}
}
}
#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
unsafe fn atomic_load<T>(dst: *const T, order:Ordering) -> T {
match order {
Acquire => intrinsics::atomic_load_acq(dst),
}
#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
unsafe fn atomic_swap<T>(dst: *mut T, val: T, order: Ordering) -> T {
match order {
Acquire => intrinsics::atomic_xchg_acq(dst, val),
/// Returns the old value (like __sync_fetch_and_add).
#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
unsafe fn atomic_add<T>(dst: *mut T, val: T, order: Ordering) -> T {
match order {
Acquire => intrinsics::atomic_xadd_acq(dst, val),
/// Returns the old value (like __sync_fetch_and_sub).
#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
unsafe fn atomic_sub<T>(dst: *mut T, val: T, order: Ordering) -> T {
match order {
Acquire => intrinsics::atomic_xsub_acq(dst, val),
}
#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
unsafe fn atomic_compare_and_swap<T>(dst: *mut T, old:T, new:T, order: Ordering) -> T {
match order {
Acquire => intrinsics::atomic_cxchg_acq(dst, old, new),
}
#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
unsafe fn atomic_and<T>(dst: *mut T, val: T, order: Ordering) -> T {
match order {
Acquire => intrinsics::atomic_and_acq(dst, val),
}
#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
unsafe fn atomic_nand<T>(dst: *mut T, val: T, order: Ordering) -> T {
match order {
Acquire => intrinsics::atomic_nand_acq(dst, val),
#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
unsafe fn atomic_or<T>(dst: *mut T, val: T, order: Ordering) -> T {
match order {
Acquire => intrinsics::atomic_or_acq(dst, val),
#[inline]
-#[stable(feature = "rust1", since = "1.0.0")]
unsafe fn atomic_xor<T>(dst: *mut T, val: T, order: Ordering) -> T {
match order {
Acquire => intrinsics::atomic_xor_acq(dst, val),
///
/// - total and antisymmetric: exactly one of `a < b`, `a == b` or `a > b` is true; and
/// - transitive, `a < b` and `b < c` implies `a < c`. The same must hold for both `==` and `>`.
+///
+/// When this trait is `derive`d, it produces a lexicographic ordering.
#[stable(feature = "rust1", since = "1.0.0")]
pub trait Ord: Eq + PartialOrd<Self> {
/// This method returns an `Ordering` between `self` and `other`.
}
}
-/// Format trait for the `:?` format. Useful for debugging, all types
+/// Format trait for the `?` character. Useful for debugging, all types
/// should implement this.
///
/// Generally speaking, you should just `derive` a `Debug` implementation.
/// There are a number of `debug_*` methods on `Formatter` to help you with manual
/// implementations, such as [`debug_struct`][debug_struct].
///
+/// `Debug` implementations using either `derive` or the debug builder API
+/// on `Formatter` support pretty printing using the alternate flag: `{:#?}`.
+///
/// [debug_struct]: ../std/fmt/struct.Formatter.html#method.debug_struct
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_on_unimplemented = "`{Self}` cannot be formatted using `:?`; if it is \
#[stable(feature = "rust1", since = "1.0.0")]
impl Display for char {
fn fmt(&self, f: &mut Formatter) -> Result {
- f.write_char(*self)
+ if f.width.is_none() && f.precision.is_none() {
+ f.write_char(*self)
+ } else {
+ let mut utf8 = [0; 4];
+ let amt = self.encode_utf8(&mut utf8).unwrap_or(0);
+ let s: &str = unsafe { mem::transmute(&utf8[..amt]) };
+ f.pad(s)
+ }
}
}
/// Disposes of a value.
///
-/// This function can be used to destroy any value by allowing `drop` to take ownership of its
-/// argument.
+/// While this does call the argument's implementation of `Drop`, it will not
+/// release any borrows, as borrows are based on lexical scope.
///
/// # Examples
///
+/// Basic usage:
+///
+/// ```
+/// let v = vec![1, 2, 3];
+///
+/// drop(v); // explicitly drop the vector
+/// ```
+///
+/// Borrows are based on lexical scope, so this produces an error:
+///
+/// ```ignore
+/// let mut v = vec![1, 2, 3];
+/// let x = &v[0];
+///
+/// drop(x); // explicitly drop the reference, but the borrow still exists
+///
+/// v.push(4); // error: cannot borrow `v` as mutable because it is also
+/// // borrowed as immutable
+/// ```
+///
+/// An inner scope is needed to fix this:
+///
+/// ```
+/// let mut v = vec![1, 2, 3];
+///
+/// {
+/// let x = &v[0];
+///
+/// drop(x); // this is now redundant, as `x` is going out of scope anyway
+/// }
+///
+/// v.push(4); // no problems
+/// ```
+///
+/// Since `RefCell` enforces the borrow rules at runtime, `drop()` can
+/// seemingly release a borrow of one:
+///
/// ```
/// use std::cell::RefCell;
///
#![doc(primitive = "str")]
#![stable(feature = "rust1", since = "1.0.0")]
-use self::OldSearcher::{TwoWay, TwoWayLong};
use self::pattern::Pattern;
use self::pattern::{Searcher, ReverseSearcher, DoubleEndedSearcher};
use char::CharExt;
use clone::Clone;
-use cmp::{self, Eq};
+use cmp::Eq;
use convert::AsRef;
use default::Default;
use fmt;
use raw::{Repr, Slice};
use result::Result::{self, Ok, Err};
use slice::{self, SliceExt};
-use usize;
pub mod pattern;
}
}
-/// The internal state of an iterator that searches for matches of a substring
-/// within a larger string using two-way search
-#[derive(Clone)]
-struct TwoWaySearcher {
- // constants
- crit_pos: usize,
- period: usize,
- byteset: u64,
-
- // variables
- position: usize,
- memory: usize
-}
-
-/*
- This is the Two-Way search algorithm, which was introduced in the paper:
- Crochemore, M., Perrin, D., 1991, Two-way string-matching, Journal of the ACM 38(3):651-675.
-
- Here's some background information.
-
- A *word* is a string of symbols. The *length* of a word should be a familiar
- notion, and here we denote it for any word x by |x|.
- (We also allow for the possibility of the *empty word*, a word of length zero).
-
- If x is any non-empty word, then an integer p with 0 < p <= |x| is said to be a
- *period* for x iff for all i with 0 <= i <= |x| - p - 1, we have x[i] == x[i+p].
- For example, both 1 and 2 are periods for the string "aa". As another example,
- the only period of the string "abcd" is 4.
-
- We denote by period(x) the *smallest* period of x (provided that x is non-empty).
- This is always well-defined since every non-empty word x has at least one period,
- |x|. We sometimes call this *the period* of x.
-
- If u, v and x are words such that x = uv, where uv is the concatenation of u and
- v, then we say that (u, v) is a *factorization* of x.
-
- Let (u, v) be a factorization for a word x. Then if w is a non-empty word such
- that both of the following hold
-
- - either w is a suffix of u or u is a suffix of w
- - either w is a prefix of v or v is a prefix of w
-
- then w is said to be a *repetition* for the factorization (u, v).
-
- Just to unpack this, there are four possibilities here. Let w = "abc". Then we
- might have:
-
- - w is a suffix of u and w is a prefix of v. ex: ("lolabc", "abcde")
- - w is a suffix of u and v is a prefix of w. ex: ("lolabc", "ab")
- - u is a suffix of w and w is a prefix of v. ex: ("bc", "abchi")
- - u is a suffix of w and v is a prefix of w. ex: ("bc", "a")
-
- Note that the word vu is a repetition for any factorization (u,v) of x = uv,
- so every factorization has at least one repetition.
-
- If x is a string and (u, v) is a factorization for x, then a *local period* for
- (u, v) is an integer r such that there is some word w such that |w| = r and w is
- a repetition for (u, v).
-
- We denote by local_period(u, v) the smallest local period of (u, v). We sometimes
- call this *the local period* of (u, v). Provided that x = uv is non-empty, this
- is well-defined (because each non-empty word has at least one factorization, as
- noted above).
-
- It can be proven that the following is an equivalent definition of a local period
- for a factorization (u, v): any positive integer r such that x[i] == x[i+r] for
- all i such that |u| - r <= i <= |u| - 1 and such that both x[i] and x[i+r] are
- defined. (i.e. i > 0 and i + r < |x|).
-
- Using the above reformulation, it is easy to prove that
-
- 1 <= local_period(u, v) <= period(uv)
-
- A factorization (u, v) of x such that local_period(u,v) = period(x) is called a
- *critical factorization*.
-
- The algorithm hinges on the following theorem, which is stated without proof:
-
- **Critical Factorization Theorem** Any word x has at least one critical
- factorization (u, v) such that |u| < period(x).
-
- The purpose of maximal_suffix is to find such a critical factorization.
-
-*/
-impl TwoWaySearcher {
- #[allow(dead_code)]
- fn new(needle: &[u8]) -> TwoWaySearcher {
- let (crit_pos_false, period_false) = TwoWaySearcher::maximal_suffix(needle, false);
- let (crit_pos_true, period_true) = TwoWaySearcher::maximal_suffix(needle, true);
-
- let (crit_pos, period) =
- if crit_pos_false > crit_pos_true {
- (crit_pos_false, period_false)
- } else {
- (crit_pos_true, period_true)
- };
-
- // This isn't in the original algorithm, as far as I'm aware.
- let byteset = needle.iter()
- .fold(0, |a, &b| (1 << ((b & 0x3f) as usize)) | a);
-
- // A particularly readable explanation of what's going on here can be found
- // in Crochemore and Rytter's book "Text Algorithms", ch 13. Specifically
- // see the code for "Algorithm CP" on p. 323.
- //
- // What's going on is we have some critical factorization (u, v) of the
- // needle, and we want to determine whether u is a suffix of
- // &v[..period]. If it is, we use "Algorithm CP1". Otherwise we use
- // "Algorithm CP2", which is optimized for when the period of the needle
- // is large.
- if &needle[..crit_pos] == &needle[period.. period + crit_pos] {
- TwoWaySearcher {
- crit_pos: crit_pos,
- period: period,
- byteset: byteset,
-
- position: 0,
- memory: 0
- }
- } else {
- TwoWaySearcher {
- crit_pos: crit_pos,
- period: cmp::max(crit_pos, needle.len() - crit_pos) + 1,
- byteset: byteset,
-
- position: 0,
- memory: usize::MAX // Dummy value to signify that the period is long
- }
- }
- }
-
- // One of the main ideas of Two-Way is that we factorize the needle into
- // two halves, (u, v), and begin trying to find v in the haystack by scanning
- // left to right. If v matches, we try to match u by scanning right to left.
- // How far we can jump when we encounter a mismatch is all based on the fact
- // that (u, v) is a critical factorization for the needle.
- #[inline]
- fn next(&mut self, haystack: &[u8], needle: &[u8], long_period: bool)
- -> Option<(usize, usize)> {
- 'search: loop {
- // Check that we have room to search in
- if self.position + needle.len() > haystack.len() {
- return None;
- }
-
- // Quickly skip by large portions unrelated to our substring
- if (self.byteset >>
- ((haystack[self.position + needle.len() - 1] & 0x3f)
- as usize)) & 1 == 0 {
- self.position += needle.len();
- if !long_period {
- self.memory = 0;
- }
- continue 'search;
- }
-
- // See if the right part of the needle matches
- let start = if long_period { self.crit_pos }
- else { cmp::max(self.crit_pos, self.memory) };
- for i in start..needle.len() {
- if needle[i] != haystack[self.position + i] {
- self.position += i - self.crit_pos + 1;
- if !long_period {
- self.memory = 0;
- }
- continue 'search;
- }
- }
-
- // See if the left part of the needle matches
- let start = if long_period { 0 } else { self.memory };
- for i in (start..self.crit_pos).rev() {
- if needle[i] != haystack[self.position + i] {
- self.position += self.period;
- if !long_period {
- self.memory = needle.len() - self.period;
- }
- continue 'search;
- }
- }
-
- // We have found a match!
- let match_pos = self.position;
- self.position += needle.len(); // add self.period for all matches
- if !long_period {
- self.memory = 0; // set to needle.len() - self.period for all matches
- }
- return Some((match_pos, match_pos + needle.len()));
- }
- }
-
- // Computes a critical factorization (u, v) of `arr`.
- // Specifically, returns (i, p), where i is the starting index of v in some
- // critical factorization (u, v) and p = period(v)
- #[inline]
- #[allow(dead_code)]
- #[allow(deprecated)]
- fn maximal_suffix(arr: &[u8], reversed: bool) -> (usize, usize) {
- let mut left: usize = !0; // Corresponds to i in the paper
- let mut right = 0; // Corresponds to j in the paper
- let mut offset = 1; // Corresponds to k in the paper
- let mut period = 1; // Corresponds to p in the paper
-
- while right + offset < arr.len() {
- let a;
- let b;
- if reversed {
- a = arr[left.wrapping_add(offset)];
- b = arr[right + offset];
- } else {
- a = arr[right + offset];
- b = arr[left.wrapping_add(offset)];
- }
- if a < b {
- // Suffix is smaller, period is entire prefix so far.
- right += offset;
- offset = 1;
- period = right.wrapping_sub(left);
- } else if a == b {
- // Advance through repetition of the current period.
- if offset == period {
- right += offset;
- offset = 1;
- } else {
- offset += 1;
- }
- } else {
- // Suffix is larger, start over from current location.
- left = right;
- right += 1;
- offset = 1;
- period = 1;
- }
- }
- (left.wrapping_add(1), period)
- }
-}
-
-/// The internal state of an iterator that searches for matches of a substring
-/// within a larger string using a dynamically chosen search algorithm
-#[derive(Clone)]
-// NB: This is kept around for convenience because
-// it is planned to be used again in the future
-enum OldSearcher {
- TwoWay(TwoWaySearcher),
- TwoWayLong(TwoWaySearcher),
-}
-
-impl OldSearcher {
- #[allow(dead_code)]
- fn new(haystack: &[u8], needle: &[u8]) -> OldSearcher {
- if needle.is_empty() {
- // Handle specially
- unimplemented!()
- // FIXME: Tune this.
- // FIXME(#16715): This unsigned integer addition will probably not
- // overflow because that would mean that the memory almost solely
- // consists of the needle. Needs #16715 to be formally fixed.
- } else if needle.len() + 20 > haystack.len() {
- // Use naive searcher
- unimplemented!()
- } else {
- let searcher = TwoWaySearcher::new(needle);
- if searcher.memory == usize::MAX { // If the period is long
- TwoWayLong(searcher)
- } else {
- TwoWay(searcher)
- }
- }
- }
-}
-
-#[derive(Clone)]
-// NB: This is kept around for convenience because
-// it is planned to be used again in the future
-struct OldMatchIndices<'a, 'b> {
- // constants
- haystack: &'a str,
- needle: &'b str,
- searcher: OldSearcher
-}
-
-impl<'a, 'b> OldMatchIndices<'a, 'b> {
- #[inline]
- #[allow(dead_code)]
- fn next(&mut self) -> Option<(usize, usize)> {
- match self.searcher {
- TwoWay(ref mut searcher)
- => searcher.next(self.haystack.as_bytes(), self.needle.as_bytes(), false),
- TwoWayLong(ref mut searcher)
- => searcher.next(self.haystack.as_bytes(), self.needle.as_bytes(), true),
- }
- }
-}
-
/*
Section: Comparing strings
*/
reason = "API not fully fleshed out and ready to be stabilized")]
use prelude::*;
+use core::cmp;
+use usize;
// Pattern
impl<'a, C: CharEq> DoubleEndedSearcher<'a> for CharEqSearcher<'a, C> {}
-/////////////////////////////////////////////////////////////////////////////
-// Impl for &str
-/////////////////////////////////////////////////////////////////////////////
-
-// Todo: Optimize the naive implementation here
-
-/// Associated type for `<&str as Pattern<'a>>::Searcher`.
-#[derive(Clone)]
-pub struct StrSearcher<'a, 'b> {
- haystack: &'a str,
- needle: &'b str,
- start: usize,
- end: usize,
- state: State,
-}
-
-#[derive(Clone, PartialEq)]
-enum State { Done, NotDone, Reject(usize, usize) }
-impl State {
- #[inline] fn done(&self) -> bool { *self == State::Done }
- #[inline] fn take(&mut self) -> State { ::mem::replace(self, State::NotDone) }
-}
-
-/// Non-allocating substring search.
-///
-/// Will handle the pattern `""` as returning empty matches at each utf8
-/// boundary.
-impl<'a, 'b> Pattern<'a> for &'b str {
- type Searcher = StrSearcher<'a, 'b>;
-
- #[inline]
- fn into_searcher(self, haystack: &'a str) -> StrSearcher<'a, 'b> {
- StrSearcher {
- haystack: haystack,
- needle: self,
- start: 0,
- end: haystack.len(),
- state: State::NotDone,
- }
- }
-}
-
-unsafe impl<'a, 'b> Searcher<'a> for StrSearcher<'a, 'b> {
- #[inline]
- fn haystack(&self) -> &'a str {
- self.haystack
- }
-
- #[inline]
- fn next(&mut self) -> SearchStep {
- str_search_step(self,
- |m: &mut StrSearcher| {
- // Forward step for empty needle
- let current_start = m.start;
- if !m.state.done() {
- m.start = m.haystack.char_range_at(current_start).next;
- m.state = State::Reject(current_start, m.start);
- }
- SearchStep::Match(current_start, current_start)
- },
- |m: &mut StrSearcher| {
- // Forward step for nonempty needle
- let current_start = m.start;
- // Compare byte window because this might break utf8 boundaries
- let possible_match = &m.haystack.as_bytes()[m.start .. m.start + m.needle.len()];
- if possible_match == m.needle.as_bytes() {
- m.start += m.needle.len();
- SearchStep::Match(current_start, m.start)
- } else {
- // Skip a char
- let haystack_suffix = &m.haystack[m.start..];
- m.start += haystack_suffix.chars().next().unwrap().len_utf8();
- SearchStep::Reject(current_start, m.start)
- }
- })
- }
-}
-
-unsafe impl<'a, 'b> ReverseSearcher<'a> for StrSearcher<'a, 'b> {
- #[inline]
- fn next_back(&mut self) -> SearchStep {
- str_search_step(self,
- |m: &mut StrSearcher| {
- // Backward step for empty needle
- let current_end = m.end;
- if !m.state.done() {
- m.end = m.haystack.char_range_at_reverse(current_end).next;
- m.state = State::Reject(m.end, current_end);
- }
- SearchStep::Match(current_end, current_end)
- },
- |m: &mut StrSearcher| {
- // Backward step for nonempty needle
- let current_end = m.end;
- // Compare byte window because this might break utf8 boundaries
- let possible_match = &m.haystack.as_bytes()[m.end - m.needle.len() .. m.end];
- if possible_match == m.needle.as_bytes() {
- m.end -= m.needle.len();
- SearchStep::Match(m.end, current_end)
- } else {
- // Skip a char
- let haystack_prefix = &m.haystack[..m.end];
- m.end -= haystack_prefix.chars().rev().next().unwrap().len_utf8();
- SearchStep::Reject(m.end, current_end)
- }
- })
- }
-}
-
-// Helper function for encapsulating the common control flow
-// of doing a search step from the front or doing a search step from the back
-fn str_search_step<F, G>(mut m: &mut StrSearcher,
- empty_needle_step: F,
- nonempty_needle_step: G) -> SearchStep
- where F: FnOnce(&mut StrSearcher) -> SearchStep,
- G: FnOnce(&mut StrSearcher) -> SearchStep
-{
- if m.state.done() {
- SearchStep::Done
- } else if m.needle.is_empty() && m.start <= m.end {
- // Case for needle == ""
- if let State::Reject(a, b) = m.state.take() {
- SearchStep::Reject(a, b)
- } else {
- if m.start == m.end {
- m.state = State::Done;
- }
- empty_needle_step(&mut m)
- }
- } else if m.start + m.needle.len() <= m.end {
- // Case for needle != ""
- nonempty_needle_step(&mut m)
- } else if m.start < m.end {
- // Remaining slice shorter than needle, reject it
- m.state = State::Done;
- SearchStep::Reject(m.start, m.end)
- } else {
- m.state = State::Done;
- SearchStep::Done
- }
-}
-
/////////////////////////////////////////////////////////////////////////////
macro_rules! pattern_methods {
impl<'a, 'b> Pattern<'a> for &'b &'b str {
pattern_methods!(StrSearcher<'a, 'b>, |&s| s, |s| s);
}
+
+/////////////////////////////////////////////////////////////////////////////
+// Impl for &str
+/////////////////////////////////////////////////////////////////////////////
+
+/// Non-allocating substring search.
+///
+/// Will handle the pattern `""` as returning empty matches at each character
+/// boundary.
+impl<'a, 'b> Pattern<'a> for &'b str {
+ type Searcher = StrSearcher<'a, 'b>;
+
+ #[inline]
+ fn into_searcher(self, haystack: &'a str) -> StrSearcher<'a, 'b> {
+ StrSearcher::new(haystack, self)
+ }
+
+ /// Checks whether the pattern matches at the front of the haystack
+ #[inline]
+ fn is_prefix_of(self, haystack: &'a str) -> bool {
+ // Use `as_bytes` so that we can slice through a character in the haystack.
+ // Since self is always valid UTF-8, this can't result in a false positive.
+ self.len() <= haystack.len() &&
+ self.as_bytes() == &haystack.as_bytes()[..self.len()]
+ }
+
+ /// Checks whether the pattern matches at the back of the haystack
+ #[inline]
+ fn is_suffix_of(self, haystack: &'a str) -> bool {
+ self.len() <= haystack.len() &&
+ self.as_bytes() == &haystack.as_bytes()[haystack.len() - self.len()..]
+ }
+}
+
+
+/////////////////////////////////////////////////////////////////////////////
+// Two Way substring searcher
+/////////////////////////////////////////////////////////////////////////////
+
+#[derive(Clone, Debug)]
+/// Associated type for `<&str as Pattern<'a>>::Searcher`.
+pub struct StrSearcher<'a, 'b> {
+ haystack: &'a str,
+ needle: &'b str,
+
+ searcher: StrSearcherImpl,
+}
+
+#[derive(Clone, Debug)]
+enum StrSearcherImpl {
+ Empty(EmptyNeedle),
+ TwoWay(TwoWaySearcher),
+}
+
+#[derive(Clone, Debug)]
+struct EmptyNeedle {
+ position: usize,
+ end: usize,
+ is_match_fw: bool,
+ is_match_bw: bool,
+}
+
+impl<'a, 'b> StrSearcher<'a, 'b> {
+ fn new(haystack: &'a str, needle: &'b str) -> StrSearcher<'a, 'b> {
+ if needle.is_empty() {
+ StrSearcher {
+ haystack: haystack,
+ needle: needle,
+ searcher: StrSearcherImpl::Empty(EmptyNeedle {
+ position: 0,
+ end: haystack.len(),
+ is_match_fw: true,
+ is_match_bw: true,
+ }),
+ }
+ } else {
+ StrSearcher {
+ haystack: haystack,
+ needle: needle,
+ searcher: StrSearcherImpl::TwoWay(
+ TwoWaySearcher::new(needle.as_bytes(), haystack.len())
+ ),
+ }
+ }
+ }
+}
+
+unsafe impl<'a, 'b> Searcher<'a> for StrSearcher<'a, 'b> {
+ fn haystack(&self) -> &'a str { self.haystack }
+
+ #[inline]
+ fn next(&mut self) -> SearchStep {
+ match self.searcher {
+ StrSearcherImpl::Empty(ref mut searcher) => {
+ // empty needle rejects every char and matches every empty string between them
+ let is_match = searcher.is_match_fw;
+ searcher.is_match_fw = !searcher.is_match_fw;
+ let pos = searcher.position;
+ match self.haystack[pos..].chars().next() {
+ _ if is_match => SearchStep::Match(pos, pos),
+ None => SearchStep::Done,
+ Some(ch) => {
+ searcher.position += ch.len_utf8();
+ SearchStep::Reject(pos, searcher.position)
+ }
+ }
+ }
+ StrSearcherImpl::TwoWay(ref mut searcher) => {
+ // TwoWaySearcher produces valid *Match* indices that split at char boundaries
+ // as long as it does correct matching and that haystack and needle are
+ // valid UTF-8
+ // *Rejects* from the algorithm can fall on any indices, but we will walk them
+ // manually to the next character boundary, so that they are utf-8 safe.
+ if searcher.position == self.haystack.len() {
+ return SearchStep::Done;
+ }
+ let is_long = searcher.memory == usize::MAX;
+ match searcher.next::<RejectAndMatch>(self.haystack.as_bytes(),
+ self.needle.as_bytes(),
+ is_long)
+ {
+ SearchStep::Reject(a, mut b) => {
+ // skip to next char boundary
+ while !self.haystack.is_char_boundary(b) {
+ b += 1;
+ }
+ searcher.position = cmp::max(b, searcher.position);
+ SearchStep::Reject(a, b)
+ }
+ otherwise => otherwise,
+ }
+ }
+ }
+ }
+
+ #[inline(always)]
+ fn next_match(&mut self) -> Option<(usize, usize)> {
+ match self.searcher {
+ StrSearcherImpl::Empty(..) => {
+ loop {
+ match self.next() {
+ SearchStep::Match(a, b) => return Some((a, b)),
+ SearchStep::Done => return None,
+ SearchStep::Reject(..) => { }
+ }
+ }
+ }
+ StrSearcherImpl::TwoWay(ref mut searcher) => {
+ let is_long = searcher.memory == usize::MAX;
+ if is_long {
+ searcher.next::<MatchOnly>(self.haystack.as_bytes(),
+ self.needle.as_bytes(),
+ true)
+ } else {
+ searcher.next::<MatchOnly>(self.haystack.as_bytes(),
+ self.needle.as_bytes(),
+ false)
+ }
+ }
+ }
+ }
+
+}
+unsafe impl<'a, 'b> ReverseSearcher<'a> for StrSearcher<'a, 'b> {
+ #[inline]
+ fn next_back(&mut self) -> SearchStep {
+ match self.searcher {
+ StrSearcherImpl::Empty(ref mut searcher) => {
+ let is_match = searcher.is_match_bw;
+ searcher.is_match_bw = !searcher.is_match_bw;
+ let end = searcher.end;
+ match self.haystack[..end].chars().next_back() {
+ _ if is_match => SearchStep::Match(end, end),
+ None => SearchStep::Done,
+ Some(ch) => {
+ searcher.end -= ch.len_utf8();
+ SearchStep::Reject(searcher.end, end)
+ }
+ }
+ }
+ StrSearcherImpl::TwoWay(ref mut searcher) => {
+ if searcher.end == 0 {
+ return SearchStep::Done;
+ }
+ match searcher.next_back::<RejectAndMatch>(self.haystack.as_bytes(),
+ self.needle.as_bytes())
+ {
+ SearchStep::Reject(mut a, b) => {
+ // skip to next char boundary
+ while !self.haystack.is_char_boundary(a) {
+ a -= 1;
+ }
+ searcher.end = cmp::min(a, searcher.end);
+ SearchStep::Reject(a, b)
+ }
+ otherwise => otherwise,
+ }
+ }
+ }
+ }
+
+ #[inline]
+ fn next_match_back(&mut self) -> Option<(usize, usize)> {
+ match self.searcher {
+ StrSearcherImpl::Empty(..) => {
+ loop {
+ match self.next_back() {
+ SearchStep::Match(a, b) => return Some((a, b)),
+ SearchStep::Done => return None,
+ SearchStep::Reject(..) => { }
+ }
+ }
+ }
+ StrSearcherImpl::TwoWay(ref mut searcher) => {
+ searcher.next_back::<MatchOnly>(self.haystack.as_bytes(),
+ self.needle.as_bytes())
+ }
+ }
+ }
+}
+
+/// The internal state of an iterator that searches for matches of a substring
+/// within a larger string using two-way search
+#[derive(Clone, Debug)]
+struct TwoWaySearcher {
+ // constants
+ crit_pos: usize,
+ period: usize,
+ byteset: u64,
+
+ // variables
+ position: usize,
+ end: usize,
+ memory: usize
+}
+
+/*
+ This is the Two-Way search algorithm, which was introduced in the paper:
+ Crochemore, M., Perrin, D., 1991, Two-way string-matching, Journal of the ACM 38(3):651-675.
+
+ Here's some background information.
+
+ A *word* is a string of symbols. The *length* of a word should be a familiar
+ notion, and here we denote it for any word x by |x|.
+ (We also allow for the possibility of the *empty word*, a word of length zero).
+
+ If x is any non-empty word, then an integer p with 0 < p <= |x| is said to be a
+ *period* for x iff for all i with 0 <= i <= |x| - p - 1, we have x[i] == x[i+p].
+ For example, both 1 and 2 are periods for the string "aa". As another example,
+ the only period of the string "abcd" is 4.
+
+ We denote by period(x) the *smallest* period of x (provided that x is non-empty).
+ This is always well-defined since every non-empty word x has at least one period,
+ |x|. We sometimes call this *the period* of x.
+
+ If u, v and x are words such that x = uv, where uv is the concatenation of u and
+ v, then we say that (u, v) is a *factorization* of x.
+
+ Let (u, v) be a factorization for a word x. Then if w is a non-empty word such
+ that both of the following hold
+
+ - either w is a suffix of u or u is a suffix of w
+ - either w is a prefix of v or v is a prefix of w
+
+ then w is said to be a *repetition* for the factorization (u, v).
+
+ Just to unpack this, there are four possibilities here. Let w = "abc". Then we
+ might have:
+
+ - w is a suffix of u and w is a prefix of v. ex: ("lolabc", "abcde")
+ - w is a suffix of u and v is a prefix of w. ex: ("lolabc", "ab")
+ - u is a suffix of w and w is a prefix of v. ex: ("bc", "abchi")
+ - u is a suffix of w and v is a prefix of w. ex: ("bc", "a")
+
+ Note that the word vu is a repetition for any factorization (u,v) of x = uv,
+ so every factorization has at least one repetition.
+
+ If x is a string and (u, v) is a factorization for x, then a *local period* for
+ (u, v) is an integer r such that there is some word w such that |w| = r and w is
+ a repetition for (u, v).
+
+ We denote by local_period(u, v) the smallest local period of (u, v). We sometimes
+ call this *the local period* of (u, v). Provided that x = uv is non-empty, this
+ is well-defined (because each non-empty word has at least one factorization, as
+ noted above).
+
+ It can be proven that the following is an equivalent definition of a local period
+ for a factorization (u, v): any positive integer r such that x[i] == x[i+r] for
+ all i such that |u| - r <= i <= |u| - 1 and such that both x[i] and x[i+r] are
+ defined. (i.e. i > 0 and i + r < |x|).
+
+ Using the above reformulation, it is easy to prove that
+
+ 1 <= local_period(u, v) <= period(uv)
+
+ A factorization (u, v) of x such that local_period(u,v) = period(x) is called a
+ *critical factorization*.
+
+ The algorithm hinges on the following theorem, which is stated without proof:
+
+ **Critical Factorization Theorem** Any word x has at least one critical
+ factorization (u, v) such that |u| < period(x).
+
+ The purpose of maximal_suffix is to find such a critical factorization.
+
+*/
+impl TwoWaySearcher {
+ fn new(needle: &[u8], end: usize) -> TwoWaySearcher {
+ let (crit_pos_false, period_false) = TwoWaySearcher::maximal_suffix(needle, false);
+ let (crit_pos_true, period_true) = TwoWaySearcher::maximal_suffix(needle, true);
+
+ let (crit_pos, period) =
+ if crit_pos_false > crit_pos_true {
+ (crit_pos_false, period_false)
+ } else {
+ (crit_pos_true, period_true)
+ };
+
+ // This isn't in the original algorithm, as far as I'm aware.
+ let byteset = needle.iter()
+ .fold(0, |a, &b| (1 << ((b & 0x3f) as usize)) | a);
+
+ // A particularly readable explanation of what's going on here can be found
+ // in Crochemore and Rytter's book "Text Algorithms", ch 13. Specifically
+ // see the code for "Algorithm CP" on p. 323.
+ //
+ // What's going on is we have some critical factorization (u, v) of the
+ // needle, and we want to determine whether u is a suffix of
+ // &v[..period]. If it is, we use "Algorithm CP1". Otherwise we use
+ // "Algorithm CP2", which is optimized for when the period of the needle
+ // is large.
+ if &needle[..crit_pos] == &needle[period.. period + crit_pos] {
+ // short period case
+ TwoWaySearcher {
+ crit_pos: crit_pos,
+ period: period,
+ byteset: byteset,
+
+ position: 0,
+ end: end,
+ memory: 0
+ }
+ } else {
+ // long period case
+ // we have an approximation to the actual period, and don't use memory.
+ TwoWaySearcher {
+ crit_pos: crit_pos,
+ period: cmp::max(crit_pos, needle.len() - crit_pos) + 1,
+ byteset: byteset,
+
+ position: 0,
+ end: end,
+ memory: usize::MAX // Dummy value to signify that the period is long
+ }
+ }
+ }
+
+ #[inline(always)]
+ fn byteset_contains(&self, byte: u8) -> bool {
+ (self.byteset >> ((byte & 0x3f) as usize)) & 1 != 0
+ }
+
+ // One of the main ideas of Two-Way is that we factorize the needle into
+ // two halves, (u, v), and begin trying to find v in the haystack by scanning
+ // left to right. If v matches, we try to match u by scanning right to left.
+ // How far we can jump when we encounter a mismatch is all based on the fact
+ // that (u, v) is a critical factorization for the needle.
+ #[inline(always)]
+ fn next<S>(&mut self, haystack: &[u8], needle: &[u8], long_period: bool)
+ -> S::Output
+ where S: TwoWayStrategy
+ {
+ // `next()` uses `self.position` as its cursor
+ let old_pos = self.position;
+ 'search: loop {
+ // Check that we have room to search in
+ if needle.len() > haystack.len() - self.position {
+ self.position = haystack.len();
+ return S::rejecting(old_pos, self.position);
+ }
+
+ if S::use_early_reject() && old_pos != self.position {
+ return S::rejecting(old_pos, self.position);
+ }
+
+ // Quickly skip by large portions unrelated to our substring
+ if !self.byteset_contains(haystack[self.position + needle.len() - 1]) {
+ self.position += needle.len();
+ if !long_period {
+ self.memory = 0;
+ }
+ continue 'search;
+ }
+
+ // See if the right part of the needle matches
+ let start = if long_period { self.crit_pos }
+ else { cmp::max(self.crit_pos, self.memory) };
+ for i in start..needle.len() {
+ if needle[i] != haystack[self.position + i] {
+ self.position += i - self.crit_pos + 1;
+ if !long_period {
+ self.memory = 0;
+ }
+ continue 'search;
+ }
+ }
+
+ // See if the left part of the needle matches
+ let start = if long_period { 0 } else { self.memory };
+ for i in (start..self.crit_pos).rev() {
+ if needle[i] != haystack[self.position + i] {
+ self.position += self.period;
+ if !long_period {
+ self.memory = needle.len() - self.period;
+ }
+ continue 'search;
+ }
+ }
+
+ // We have found a match!
+ let match_pos = self.position;
+
+ // Note: add self.period instead of needle.len() to have overlapping matches
+ self.position += needle.len();
+ if !long_period {
+ self.memory = 0; // set to needle.len() - self.period for overlapping matches
+ }
+
+ return S::matching(match_pos, match_pos + needle.len());
+ }
+ }
+
+ // Follows the ideas in `next()`.
+ //
+ // All the definitions are completely symmetrical, with period(x) = period(reverse(x))
+ // and local_period(u, v) = local_period(reverse(v), reverse(u)), so if (u, v)
+ // is a critical factorization, so is (reverse(v), reverse(u)). Similarly,
+ // the "period" stored in self.period is the real period if long_period is
+ // false, and so is still valid for a reversed needle, and if long_period is
+ // true, all the algorithm requires is that self.period is less than or
+ // equal to the real period, which must be true for the forward case anyway.
+ //
+ // To search in reverse through the haystack, we search forward through
+ // a reversed haystack with a reversed needle, and the above paragraph shows
+ // that the precomputed parameters can be left alone.
+ #[inline]
+ fn next_back<S>(&mut self, haystack: &[u8], needle: &[u8])
+ -> S::Output
+ where S: TwoWayStrategy
+ {
+ // `next_back()` uses `self.end` as its cursor -- so that `next()` and `next_back()`
+ // are independent.
+ let old_end = self.end;
+ 'search: loop {
+ // Check that we have room to search in
+ if needle.len() > self.end {
+ self.end = 0;
+ return S::rejecting(0, old_end);
+ }
+
+ if S::use_early_reject() && old_end != self.end {
+ return S::rejecting(self.end, old_end);
+ }
+
+ // Quickly skip by large portions unrelated to our substring
+ if !self.byteset_contains(haystack[self.end - needle.len()]) {
+ self.end -= needle.len();
+ continue 'search;
+ }
+
+ // See if the left part of the needle matches
+ for i in (0..self.crit_pos).rev() {
+ if needle[i] != haystack[self.end - needle.len() + i] {
+ self.end -= self.crit_pos - i;
+ continue 'search;
+ }
+ }
+
+ // See if the right part of the needle matches
+ for i in self.crit_pos..needle.len() {
+ if needle[i] != haystack[self.end - needle.len() + i] {
+ self.end -= self.period;
+ continue 'search;
+ }
+ }
+
+ // We have found a match!
+ let match_pos = self.end - needle.len();
+ // Note: sub self.period instead of needle.len() to have overlapping matches
+ self.end -= needle.len();
+
+ return S::matching(match_pos, match_pos + needle.len());
+ }
+ }
+
+ // Computes a critical factorization (u, v) of `arr`.
+ // Specifically, returns (i, p), where i is the starting index of v in some
+ // critical factorization (u, v) and p = period(v)
+ #[inline]
+ fn maximal_suffix(arr: &[u8], reversed: bool) -> (usize, usize) {
+ let mut left: usize = !0; // Corresponds to i in the paper
+ let mut right = 0; // Corresponds to j in the paper
+ let mut offset = 1; // Corresponds to k in the paper
+ let mut period = 1; // Corresponds to p in the paper
+
+ while right + offset < arr.len() {
+ let a;
+ let b;
+ if reversed {
+ a = arr[left.wrapping_add(offset)];
+ b = arr[right + offset];
+ } else {
+ a = arr[right + offset];
+ b = arr[left.wrapping_add(offset)];
+ }
+ if a < b {
+ // Suffix is smaller, period is entire prefix so far.
+ right += offset;
+ offset = 1;
+ period = right.wrapping_sub(left);
+ } else if a == b {
+ // Advance through repetition of the current period.
+ if offset == period {
+ right += offset;
+ offset = 1;
+ } else {
+ offset += 1;
+ }
+ } else {
+ // Suffix is larger, start over from current location.
+ left = right;
+ right += 1;
+ offset = 1;
+ period = 1;
+ }
+ }
+ (left.wrapping_add(1), period)
+ }
+}
+
+// TwoWayStrategy allows the algorithm to either skip non-matches as quickly
+// as possible, or to work in a mode where it emits Rejects relatively quickly.
+trait TwoWayStrategy {
+ type Output;
+ fn use_early_reject() -> bool;
+ fn rejecting(usize, usize) -> Self::Output;
+ fn matching(usize, usize) -> Self::Output;
+}
+
+/// Skip to match intervals as quickly as possible
+enum MatchOnly { }
+
+impl TwoWayStrategy for MatchOnly {
+ type Output = Option<(usize, usize)>;
+
+ #[inline]
+ fn use_early_reject() -> bool { false }
+ #[inline]
+ fn rejecting(_a: usize, _b: usize) -> Self::Output { None }
+ #[inline]
+ fn matching(a: usize, b: usize) -> Self::Output { Some((a, b)) }
+}
+
+/// Emit Rejects regularly
+enum RejectAndMatch { }
+
+impl TwoWayStrategy for RejectAndMatch {
+ type Output = SearchStep;
+
+ #[inline]
+ fn use_early_reject() -> bool { true }
+ #[inline]
+ fn rejecting(a: usize, b: usize) -> Self::Output { SearchStep::Reject(a, b) }
+ #[inline]
+ fn matching(a: usize, b: usize) -> Self::Output { SearchStep::Match(a, b) }
+}
// No residual flags left by pointer formatting
let p = "".as_ptr();
assert_eq!(format!("{:p} {:x}", p, 16), format!("{:p} 10", p));
+
+ assert_eq!(format!("{: >3}", 'a'), " a");
}
}
}
- #[cfg(any(target_os = "bitrig", target_os = "openbsd"))]
+ #[cfg(any(target_os = "bitrig", target_os = "netbsd", target_os ="openbsd"))]
pub mod os {
pub mod common {
pub mod posix01 {
pub __unused7: *mut c_void,
}
- #[cfg(target_os = "openbsd")]
+ #[cfg(any(target_os = "netbsd", target_os="openbsd"))]
#[repr(C)]
#[derive(Copy, Clone)] pub struct glob_t {
pub gl_pathc: c_int,
}
}
- #[cfg(any(target_os = "bitrig", target_os = "openbsd"))]
+ #[cfg(any(target_os = "bitrig", target_os = "netbsd", target_os = "openbsd"))]
pub mod os {
pub mod c95 {
use types::os::arch::c95::{c_int, c_uint};
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd",
target_os = "nacl"))]
pub mod posix88 {
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd",
target_os = "android",
target_os = "ios",
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd",
target_os = "android",
target_os = "ios",
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd",
target_os = "nacl"))]
pub mod posix01 {
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd",
target_os = "android",
target_os = "ios",
}
- #[cfg(any(target_os = "windows",
- target_os = "linux",
- target_os = "android",
- target_os = "macos",
+ #[cfg(any(target_os = "android",
+ target_os = "bitrig",
+ target_os = "dragonfly",
target_os = "ios",
target_os = "freebsd",
- target_os = "dragonfly",
- target_os = "bitrig",
+ target_os = "linux",
+ target_os = "macos",
+ target_os = "nacl",
+ target_os = "netbsd",
target_os = "openbsd",
- target_os = "nacl"))]
+ target_os = "windows"))]
pub mod posix08 {
pub mod unistd {
}
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
pub mod bsd44 {
use types::common::c95::{c_void};
#[cfg(any(target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
pub mod extra {
}
/// The helper trait for types that have a sensible way to sample
/// uniformly between two values. This should not be used directly,
/// and is only to facilitate `Range`.
+#[doc(hidden)]
pub trait SampleRange {
/// Construct the `Range` object that `sample_range`
/// requires. This should not ever be called directly, only via
mod rand_impls;
/// A type that can be randomly generated using an `Rng`.
+#[doc(hidden)]
pub trait Rand : Sized {
/// Generates a random instance of this type using the specified source of
/// randomness.
NodeLifetime(&'ast Lifetime),
}
-/// Represents an entry and its parent Node ID
+/// Represents an entry and its parent NodeID.
/// The odd layout is to bring down the total size.
#[derive(Copy, Debug)]
enum MapEntry<'ast> {
}
}
- fn parent(self) -> Option<NodeId> {
+ fn parent_node(self) -> Option<NodeId> {
Some(match self {
EntryItem(id, _) => id,
EntryForeignItem(id, _) => id,
self.find_entry(id).and_then(|x| x.to_node())
}
- /// Retrieve the parent NodeId for `id`, or `id` itself if no
- /// parent is registered in this map.
+ /// Similar to get_parent, returns the parent node id or id if there is no
+ /// parent.
+ /// This function returns the immediate parent in the AST, whereas get_parent
+ /// returns the enclosing item. Note that this might not be the actual parent
+ /// node in the AST - some kinds of nodes are not in the map and these will
+ /// never appear as the parent_node. So you can always walk the parent_nodes
+ /// from a node to the root of the ast (unless you get the same id back here
+ /// that can happen if the id is not in the map itself or is just weird).
+ pub fn get_parent_node(&self, id: NodeId) -> NodeId {
+ self.find_entry(id).and_then(|x| x.parent_node()).unwrap_or(id)
+ }
+
+ /// If there is some error when walking the parents (e.g., a node does not
+ /// have a parent in the map or a node can't be found), then we return the
+ /// last good node id we found. Note that reaching the crate root (id == 0),
+ /// is not an error, since items in the crate module have the crate root as
+ /// parent.
+ fn walk_parent_nodes<F>(&self, start_id: NodeId, found: F) -> Result<NodeId, NodeId>
+ where F: Fn(&Node<'ast>) -> bool
+ {
+ let mut id = start_id;
+ loop {
+ let parent_node = self.get_parent_node(id);
+ if parent_node == 0 {
+ return Ok(0);
+ }
+ if parent_node == id {
+ return Err(id);
+ }
+
+ let node = self.find_entry(parent_node);
+ if node.is_none() {
+ return Err(id);
+ }
+ let node = node.unwrap().to_node();
+ match node {
+ Some(ref node) => {
+ if found(node) {
+ return Ok(parent_node);
+ }
+ }
+ None => {
+ return Err(parent_node);
+ }
+ }
+ id = parent_node;
+ }
+ }
+
+ /// Retrieve the NodeId for `id`'s parent item, or `id` itself if no
+ /// parent item is in this map. The "parent item" is the closest parent node
+ /// in the AST which is recorded by the map and is an item, either an item
+ /// in a module, trait, or impl.
pub fn get_parent(&self, id: NodeId) -> NodeId {
- self.find_entry(id).and_then(|x| x.parent()).unwrap_or(id)
+ match self.walk_parent_nodes(id, |node| match *node {
+ NodeItem(_) |
+ NodeForeignItem(_) |
+ NodeTraitItem(_) |
+ NodeImplItem(_) => true,
+ _ => false,
+ }) {
+ Ok(id) => id,
+ Err(id) => id,
+ }
+ }
+
+ /// Returns the nearest enclosing scope. A scope is an item or block.
+ /// FIXME it is not clear to me that all items qualify as scopes - statics
+ /// and associated types probably shouldn't, for example. Behaviour in this
+ /// regard should be expected to be highly unstable.
+ pub fn get_enclosing_scope(&self, id: NodeId) -> Option<NodeId> {
+ match self.walk_parent_nodes(id, |node| match *node {
+ NodeItem(_) |
+ NodeForeignItem(_) |
+ NodeTraitItem(_) |
+ NodeImplItem(_) |
+ NodeBlock(_) => true,
+ _ => false,
+ }) {
+ Ok(id) => Some(id),
+ Err(_) => None,
+ }
}
pub fn get_parent_did(&self, id: NodeId) -> DefId {
return None;
}
self.idx += 1;
- let (p, name) = match self.map.find_entry(idx) {
- Some(EntryItem(p, n)) => (p, n.name()),
- Some(EntryForeignItem(p, n))=> (p, n.name()),
- Some(EntryTraitItem(p, n)) => (p, n.name()),
- Some(EntryImplItem(p, n)) => (p, n.name()),
- Some(EntryVariant(p, n)) => (p, n.name()),
+ let name = match self.map.find_entry(idx) {
+ Some(EntryItem(_, n)) => n.name(),
+ Some(EntryForeignItem(_, n))=> n.name(),
+ Some(EntryTraitItem(_, n)) => n.name(),
+ Some(EntryImplItem(_, n)) => n.name(),
+ Some(EntryVariant(_, n)) => n.name(),
_ => continue,
};
- if self.matches_names(p, name) {
+ if self.matches_names(self.map.get_parent(idx), name) {
return Some(idx)
}
}
/// A Visitor that walks over an AST and collects Node's into an AST Map.
struct NodeCollector<'ast> {
map: Vec<MapEntry<'ast>>,
- /// The node in which we are currently mapping (an item or a method).
- parent: NodeId
+ parent_node: NodeId,
}
impl<'ast> NodeCollector<'ast> {
}
fn insert(&mut self, id: NodeId, node: Node<'ast>) {
- let entry = MapEntry::from_node(self.parent, node);
+ let entry = MapEntry::from_node(self.parent_node, node);
self.insert_entry(id, entry);
}
impl<'ast> Visitor<'ast> for NodeCollector<'ast> {
fn visit_item(&mut self, i: &'ast Item) {
self.insert(i.id, NodeItem(i));
- let parent = self.parent;
- self.parent = i.id;
+
+ let parent_node = self.parent_node;
+ self.parent_node = i.id;
+
match i.node {
ItemImpl(_, _, _, _, _, ref impl_items) => {
for ii in impl_items {
_ => {}
}
visit::walk_item(self, i);
- self.parent = parent;
+ self.parent_node = parent_node;
}
fn visit_trait_item(&mut self, ti: &'ast TraitItem) {
- let parent = self.parent;
- self.parent = ti.id;
+ let parent_node = self.parent_node;
+ self.parent_node = ti.id;
visit::walk_trait_item(self, ti);
- self.parent = parent;
+ self.parent_node = parent_node;
}
fn visit_impl_item(&mut self, ii: &'ast ImplItem) {
- let parent = self.parent;
- self.parent = ii.id;
+ let parent_node = self.parent_node;
+ self.parent_node = ii.id;
+
visit::walk_impl_item(self, ii);
- self.parent = parent;
+
+ self.parent_node = parent_node;
}
fn visit_pat(&mut self, pat: &'ast Pat) {
PatIdent(..) => NodeLocal(pat),
_ => NodePat(pat)
});
+
+ let parent_node = self.parent_node;
+ self.parent_node = pat.id;
visit::walk_pat(self, pat);
+ self.parent_node = parent_node;
}
fn visit_expr(&mut self, expr: &'ast Expr) {
self.insert(expr.id, NodeExpr(expr));
+ let parent_node = self.parent_node;
+ self.parent_node = expr.id;
visit::walk_expr(self, expr);
+ self.parent_node = parent_node;
}
fn visit_stmt(&mut self, stmt: &'ast Stmt) {
- self.insert(ast_util::stmt_id(stmt), NodeStmt(stmt));
+ let id = ast_util::stmt_id(stmt);
+ self.insert(id, NodeStmt(stmt));
+ let parent_node = self.parent_node;
+ self.parent_node = id;
visit::walk_stmt(self, stmt);
+ self.parent_node = parent_node;
}
fn visit_fn(&mut self, fk: visit::FnKind<'ast>, fd: &'ast FnDecl,
- b: &'ast Block, s: Span, _: NodeId) {
+ b: &'ast Block, s: Span, id: NodeId) {
+ let parent_node = self.parent_node;
+ self.parent_node = id;
self.visit_fn_decl(fd);
visit::walk_fn(self, fk, fd, b, s);
+ self.parent_node = parent_node;
}
fn visit_ty(&mut self, ty: &'ast Ty) {
+ let parent_node = self.parent_node;
+ self.parent_node = ty.id;
match ty.node {
TyBareFn(ref fd) => {
self.visit_fn_decl(&*fd.decl);
_ => {}
}
visit::walk_ty(self, ty);
+ self.parent_node = parent_node;
}
fn visit_block(&mut self, block: &'ast Block) {
self.insert(block.id, NodeBlock(block));
+ let parent_node = self.parent_node;
+ self.parent_node = block.id;
visit::walk_block(self, block);
+ self.parent_node = parent_node;
}
fn visit_lifetime_ref(&mut self, lifetime: &'ast Lifetime) {
let mut collector = NodeCollector {
map: vec![],
- parent: CRATE_NODE_ID
+ parent_node: CRATE_NODE_ID,
};
collector.insert_entry(CRATE_NODE_ID, RootCrate);
visit::walk_crate(&mut collector, &forest.krate);
ii: ii
});
+ let ii_parent_id = fld.new_id(DUMMY_NODE_ID);
let mut collector = NodeCollector {
map: mem::replace(&mut *map.map.borrow_mut(), vec![]),
- parent: fld.new_id(DUMMY_NODE_ID)
+ parent_node: ii_parent_id,
};
- let ii_parent_id = collector.parent;
collector.insert_entry(ii_parent_id, RootInlinedParent(ii_parent));
visit::walk_inlined_item(&mut collector, &ii_parent.ii);
See the FFI section of the Reference for more information about using a custom
integer type:
-http://doc.rust-lang.org/reference.html#ffi-attributes
+https://doc.rust-lang.org/reference.html#ffi-attributes
"##,
E0109: r##"
}
```
-See also http://doc.rust-lang.org/book/unsafe.html
+See also https://doc.rust-lang.org/book/unsafe.html
"##,
E0137: r##"
E0267: r##"
This error indicates the use of a loop keyword (`break` or `continue`) inside a
-closure but outside of any loop. Break and continue can be used as normal inside
-closures as long as they are also contained within a loop. To halt the execution
-of a closure you should instead use a return statement.
+closure but outside of any loop. Erroneous code example:
+
+```
+let w = || { break; }; // error: `break` inside of a closure
+```
+
+`break` and `continue` keywords can be used as normal inside closures as long as
+they are also contained within a loop. To halt the execution of a closure you
+should instead use a return statement. Example:
+
+```
+let w = || {
+ for _ in 0..10 {
+ break;
+ }
+};
+
+w();
+```
"##,
E0268: r##"
This error indicates the use of a loop keyword (`break` or `continue`) outside
of a loop. Without a loop to break out of or continue in, no sensible action can
-be taken.
+be taken. Erroneous code example:
+
+```
+fn some_func() {
+ break; // error: `break` outside of loop
+}
+```
+
+Please verify that you are using `break` and `continue` only in loops. Example:
+
+```
+fn some_func() {
+ for _ in 0..10 {
+ break; // ok!
+ }
+}
+```
"##,
E0271: r##"
```
"##,
+E0277: r##"
+You tried to use a type which doesn't implement some trait in a place which
+expected that trait. Erroneous code example:
+
+```
+// here we declare the Foo trait with a bar method
+trait Foo {
+ fn bar(&self);
+}
+
+// we now declare a function which takes an object with Foo trait implemented
+// as parameter
+fn some_func<T: Foo>(foo: T) {
+ foo.bar();
+}
+
+fn main() {
+ // we now call the method with the i32 type, which doesn't implement
+ // the Foo trait
+ some_func(5i32); // error: the trait `Foo` is not implemented for the
+ // type `i32`
+}
+```
+
+In order to fix this error, verify that the type you're using does implement
+the trait. Example:
+
+```
+trait Foo {
+ fn bar(&self);
+}
+
+fn some_func<T: Foo>(foo: T) {
+ foo.bar(); // we can now use this method since i32 implements the
+ // Foo trait
+}
+
+// we implement the trait on the i32 type
+impl Foo for i32 {
+ fn bar(&self) {}
+}
+
+fn main() {
+ some_func(5i32); // ok!
+}
+```
+"##,
+
E0282: r##"
This error indicates that type inference did not result in one unique possible
type, and extra information is required. In most cases this can be provided
E0274, // rustc_on_unimplemented must have a value
E0275, // overflow evaluating requirement
E0276, // requirement appears on impl method but not on corresponding trait method
- E0277, // trait is not implemented for type
E0278, // requirement is not satisfied
E0279, // requirement is not satisfied
E0280, // requirement is not satisfied
#![feature(vec_push_all)]
#![feature(wrapping)]
#![feature(cell_extras)]
+#![feature(page_size)]
#![cfg_attr(test, feature(test))]
#![allow(trivial_casts)]
encode_item_sort(rbml_w, 't');
encode_family(rbml_w, 'y');
+ if let Some(ty) = associated_type.ty {
+ encode_type(ecx, rbml_w, ty);
+ }
+
is_nonstatic_method = false;
}
}
use metadata::tyencode;
use middle::cast;
use middle::check_const::ConstQualif;
-use middle::mem_categorization::Typer;
use middle::privacy::{AllPublic, LastMod};
use middle::subst;
use middle::subst::VecPerParamSpace;
c::tag_table_tcache => {
let type_scheme = val_dsr.read_type_scheme(dcx);
let lid = ast::DefId { krate: ast::LOCAL_CRATE, node: id };
- dcx.tcx.tcache.borrow_mut().insert(lid, type_scheme);
+ dcx.tcx.register_item_type(lid, type_scheme);
}
c::tag_table_param_defs => {
let bounds = val_dsr.read_type_param_def(dcx);
}
fn with_euv<'b, F, R>(&'b mut self, item_id: Option<ast::NodeId>, f: F) -> R where
- F: for<'t> FnOnce(&mut euv::ExprUseVisitor<'b, 't, 'tcx,
- ty::ParameterEnvironment<'a, 'tcx>>) -> R,
+ F: for<'t> FnOnce(&mut euv::ExprUseVisitor<'b, 't, 'b, 'tcx>) -> R,
{
let param_env = match item_id {
Some(item_id) => ty::ParameterEnvironment::for_item(self.tcx, item_id),
None => self.tcx.empty_parameter_environment()
};
- f(&mut euv::ExprUseVisitor::new(self, ¶m_env))
+
+ let infcx = infer::new_infer_ctxt(self.tcx, &self.tcx.tables, Some(param_env), false);
+
+ f(&mut euv::ExprUseVisitor::new(self, &infcx))
}
fn global_expr(&mut self, mode: Mode, expr: &ast::Expr) -> ConstQualif {
fn check_static_type(&self, e: &ast::Expr) {
let ty = self.tcx.node_id_to_type(e.id);
- let infcx = infer::new_infer_ctxt(self.tcx, &self.tcx.tables, None);
- let mut fulfill_cx = traits::FulfillmentContext::new(false);
+ let infcx = infer::new_infer_ctxt(self.tcx, &self.tcx.tables, None, false);
let cause = traits::ObligationCause::new(e.span, e.id, traits::SharedStatic);
+ let mut fulfill_cx = infcx.fulfillment_cx.borrow_mut();
fulfill_cx.register_builtin_bound(&infcx, ty, ty::BoundSync, cause);
- match fulfill_cx.select_all_or_error(&infcx, &infcx.parameter_environment) {
+ match fulfill_cx.select_all_or_error(&infcx) {
Ok(()) => { },
Err(ref errors) => {
traits::report_fulfillment_errors(&infcx, errors);
use middle::expr_use_visitor::{JustWrite, LoanCause, MutateMode};
use middle::expr_use_visitor::WriteAndRead;
use middle::expr_use_visitor as euv;
-use middle::mem_categorization::{cmt, Typer};
+use middle::infer;
+use middle::mem_categorization::{cmt};
use middle::pat_util::*;
use middle::ty::*;
use middle::ty;
match p.node {
ast::PatIdent(ast::BindByValue(_), _, ref sub) => {
let pat_ty = tcx.node_id_to_type(p.id);
- if cx.param_env.type_moves_by_default(pat_ty, pat.span) {
+ //FIXME: (@jroesch) this code should be floated up as well
+ let infcx = infer::new_infer_ctxt(cx.tcx,
+ &cx.tcx.tables,
+ Some(cx.param_env.clone()),
+ false);
+ if infcx.type_moves_by_default(pat_ty, pat.span) {
check_move(p, sub.as_ref().map(|p| &**p));
}
}
let mut checker = MutationChecker {
cx: cx,
};
- let mut visitor = ExprUseVisitor::new(&mut checker,
- &checker.cx.param_env);
+
+ let infcx = infer::new_infer_ctxt(cx.tcx,
+ &cx.tcx.tables,
+ Some(checker.cx.param_env.clone()),
+ false);
+
+ let mut visitor = ExprUseVisitor::new(&mut checker, &infcx);
visitor.walk_expr(guard);
}
// is the public starting point.
use middle::expr_use_visitor as euv;
+use middle::infer;
use middle::mem_categorization as mc;
use middle::ty::ParameterEnvironment;
use middle::ty;
s: Span,
fn_id: ast::NodeId) {
{
+ // FIXME (@jroesch) change this to be an inference context
let param_env = ParameterEnvironment::for_item(self.tcx, fn_id);
+ let infcx = infer::new_infer_ctxt(self.tcx,
+ &self.tcx.tables,
+ Some(param_env.clone()),
+ false);
let mut delegate = RvalueContextDelegate { tcx: self.tcx, param_env: ¶m_env };
- let mut euv = euv::ExprUseVisitor::new(&mut delegate, ¶m_env);
+ let mut euv = euv::ExprUseVisitor::new(&mut delegate, &infcx);
euv.walk_fn(fd, b);
}
visit::walk_fn(self, fk, fd, b, s)
substs: trait_substs });
tcx.populate_implementations_for_trait_if_necessary(trait_ref.def_id());
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None, false);
- let mut selcx = traits::SelectionContext::new(&infcx, &infcx.parameter_environment);
+ let mut selcx = traits::SelectionContext::new(&infcx);
let obligation = traits::Obligation::new(traits::ObligationCause::dummy(),
trait_ref.to_poly_trait_predicate());
let selection = match selcx.select(&obligation) {
use self::OverloadedCallType::*;
use middle::{def, region, pat_util};
+use middle::infer;
use middle::mem_categorization as mc;
-use middle::mem_categorization::Typer;
use middle::ty::{self};
use middle::ty::{MethodCall, MethodObject, MethodTraitObject};
use middle::ty::{MethodOrigin, MethodParam, MethodTypeParam};
// supplies types from the tree. After type checking is complete, you
// can just use the tcx as the typer.
-pub struct ExprUseVisitor<'d,'t,'tcx:'t,TYPER:'t> {
- typer: &'t TYPER,
- mc: mc::MemCategorizationContext<'t,TYPER>,
+pub struct ExprUseVisitor<'d,'t,'a: 't, 'tcx:'a> {
+ typer: &'t infer::InferCtxt<'a, 'tcx>,
+ mc: mc::MemCategorizationContext<'t, 'a, 'tcx>,
delegate: &'d mut (Delegate<'tcx>+'d),
}
ByRef,
}
-impl<'d,'t,'tcx,TYPER:mc::Typer<'tcx>> ExprUseVisitor<'d,'t,'tcx,TYPER> {
+impl<'d,'t,'a,'tcx> ExprUseVisitor<'d,'t,'a,'tcx> {
pub fn new(delegate: &'d mut Delegate<'tcx>,
- typer: &'t TYPER)
- -> ExprUseVisitor<'d,'t,'tcx,TYPER> {
+ typer: &'t infer::InferCtxt<'a, 'tcx>)
+ -> ExprUseVisitor<'d,'t,'a, 'tcx> {
ExprUseVisitor {
typer: typer,
mc: mc::MemCategorizationContext::new(typer),
}
fn tcx(&self) -> &'t ty::ctxt<'tcx> {
- self.typer.tcx()
+ self.typer.tcx
}
fn delegate_consume(&mut self,
match local.init {
None => {
let delegate = &mut self.delegate;
- pat_util::pat_bindings(&self.typer.tcx().def_map, &*local.pat,
+ pat_util::pat_bindings(&self.typer.tcx.def_map, &*local.pat,
|_, id, span, _| {
delegate.decl_without_init(id, span);
})
let delegate = &mut self.delegate;
return_if_err!(mc.cat_pattern(cmt_discr.clone(), pat, |mc, cmt_pat, pat| {
if pat_util::pat_is_binding(def_map, pat) {
- let tcx = typer.tcx();
+ let tcx = typer.tcx;
debug!("binding cmt_pat={:?} pat={:?} match_mode={:?}",
cmt_pat,
// the leaves of the pattern tree structure.
return_if_err!(mc.cat_pattern(cmt_discr, pat, |mc, cmt_pat, pat| {
let def_map = def_map.borrow();
- let tcx = typer.tcx();
+ let tcx = typer.tcx;
match pat.node {
ast::PatEnum(_, _) | ast::PatQPath(..) |
}
}
-fn copy_or_move<'tcx>(typer: &mc::Typer<'tcx>,
+fn copy_or_move<'a, 'tcx>(typer: &infer::InferCtxt<'a, 'tcx>,
cmt: &mc::cmt<'tcx>,
move_reason: MoveReason)
-> ConsumeMode
struct Implicator<'a, 'tcx: 'a> {
infcx: &'a InferCtxt<'a,'tcx>,
- closure_typer: &'a (ty::ClosureTyper<'tcx>+'a),
body_id: ast::NodeId,
stack: Vec<(ty::Region, Option<Ty<'tcx>>)>,
span: Span,
/// appear in a context with lifetime `outer_region`
pub fn implications<'a,'tcx>(
infcx: &'a InferCtxt<'a,'tcx>,
- closure_typer: &ty::ClosureTyper<'tcx>,
body_id: ast::NodeId,
ty: Ty<'tcx>,
outer_region: ty::Region,
let mut stack = Vec::new();
stack.push((outer_region, None));
- let mut wf = Implicator { closure_typer: closure_typer,
- infcx: infcx,
+ let mut wf = Implicator { infcx: infcx,
body_id: body_id,
span: span,
stack: stack,
{
let value =
traits::fully_normalize(self.infcx,
- self.closure_typer,
traits::ObligationCause::misc(self.span, self.body_id),
value);
match value {
where T: TypeFoldable<'tcx>,
F: FnMut(ty::Region, ty::DebruijnIndex) -> ty::Region,
{
- unbound_value.fold_with(&mut ty_fold::RegionFolder::new(tcx, &mut |region, current_depth| {
+ ty_fold::fold_regions(tcx, unbound_value, &mut false, |region, current_depth| {
// we should only be encountering "escaping" late-bound regions here,
// because the ones at the current level should have been replaced
// with fresh variables
});
fldr(region, ty::DebruijnIndex::new(current_depth))
- }))
+ })
}
impl<'a,'tcx> InferCtxtExt for InferCtxt<'a,'tcx> {
let escaping_types =
self.type_variables.borrow().types_escaping_snapshot(&snapshot.type_snapshot);
- let escaping_region_vars: FnvHashSet<_> =
- escaping_types
- .iter()
- .flat_map(|&t| ty_fold::collect_regions(self.tcx, &t))
- .collect();
+ let mut escaping_region_vars = FnvHashSet();
+ for ty in &escaping_types {
+ ty_fold::collect_regions(self.tcx, ty, &mut escaping_region_vars);
+ }
region_vars.retain(|®ion_vid| {
let r = ty::ReInfer(ty::ReVar(region_vid));
// binder is that we encountered in `value`. The caller is
// responsible for ensuring that (a) `value` contains at least one
// binder and (b) that binder is the one we want to use.
- let result = ty_fold::fold_regions(infcx.tcx, &value, |r, current_depth| {
+ let result = ty_fold::fold_regions(infcx.tcx, &value, &mut false, |r, current_depth| {
match inv_skol_map.get(&r) {
None => r,
Some(br) => {
use middle::subst;
use middle::subst::Substs;
use middle::subst::Subst;
-use middle::traits;
+use middle::traits::{self, FulfillmentContext, Normalized,
+ SelectionContext, ObligationCause};
use middle::ty::{TyVid, IntVid, FloatVid, RegionVid, UnconstrainedNumeric};
use middle::ty::{self, Ty, HasTypeFlags};
use middle::ty_fold::{self, TypeFolder, TypeFoldable};
use std::fmt;
use syntax::ast;
use syntax::codemap;
-use syntax::codemap::Span;
+use syntax::codemap::{Span, DUMMY_SP};
use util::nodemap::{FnvHashMap, NodeMap};
use self::combine::CombineFields;
pub parameter_environment: ty::ParameterEnvironment<'a, 'tcx>,
+ pub fulfillment_cx: RefCell<traits::FulfillmentContext<'tcx>>,
+
// This is a temporary field used for toggling on normalization in the inference context,
// as we move towards the approach described here:
// https://internals.rust-lang.org/t/flattening-the-contexts-for-fun-and-profit/2293
}
}
+/// errors_will_be_reported is required to proxy to the fulfillment context
+/// FIXME -- a better option would be to hold back on modifying
+/// the global cache until we know that all dependent obligations
+/// are also satisfied. In that case, we could actually remove
+/// this boolean flag, and we'd also avoid the problem of squelching
+/// duplicate errors that occur across fns.
pub fn new_infer_ctxt<'a, 'tcx>(tcx: &'a ty::ctxt<'tcx>,
tables: &'a RefCell<ty::Tables<'tcx>>,
- param_env: Option<ty::ParameterEnvironment<'a, 'tcx>>)
+ param_env: Option<ty::ParameterEnvironment<'a, 'tcx>>,
+ errors_will_be_reported: bool)
-> InferCtxt<'a, 'tcx> {
InferCtxt {
tcx: tcx,
float_unification_table: RefCell::new(UnificationTable::new()),
region_vars: RegionVarBindings::new(tcx),
parameter_environment: param_env.unwrap_or(tcx.empty_parameter_environment()),
+ fulfillment_cx: RefCell::new(traits::FulfillmentContext::new(errors_will_be_reported)),
normalize: false,
err_count_on_creation: tcx.sess.err_count()
}
}
+pub fn normalizing_infer_ctxt<'a, 'tcx>(tcx: &'a ty::ctxt<'tcx>,
+ tables: &'a RefCell<ty::Tables<'tcx>>)
+ -> InferCtxt<'a, 'tcx> {
+ let mut infcx = new_infer_ctxt(tcx, tables, None, false);
+ infcx.normalize = true;
+ infcx
+}
+
/// Computes the least upper-bound of `a` and `b`. If this is not possible, reports an error and
/// returns ty::err.
pub fn common_supertype<'a, 'tcx>(cx: &InferCtxt<'a, 'tcx>,
region_vars_snapshot: RegionSnapshot,
}
-impl<'a, 'tcx> mc::Typer<'tcx> for InferCtxt<'a, 'tcx> {
- fn node_ty(&self, id: ast::NodeId) -> McResult<Ty<'tcx>> {
- let ty = self.node_ty(id);
- self.resolve_type_vars_or_error(&ty)
- }
+pub fn normalize_associated_type<'tcx,T>(tcx: &ty::ctxt<'tcx>, value: &T) -> T
+ where T : TypeFoldable<'tcx> + HasTypeFlags
+{
+ debug!("normalize_associated_type(t={:?})", value);
- fn expr_ty_adjusted(&self, expr: &ast::Expr) -> McResult<Ty<'tcx>> {
- let ty = self.adjust_expr_ty(expr, self.tables.borrow().adjustments.get(&expr.id));
- self.resolve_type_vars_or_error(&ty)
- }
+ let value = erase_regions(tcx, value);
- fn type_moves_by_default(&self, ty: Ty<'tcx>, span: Span) -> bool {
- let ty = self.resolve_type_vars_if_possible(&ty);
- !traits::type_known_to_meet_builtin_bound(self, self, ty, ty::BoundCopy, span)
+ if !value.has_projection_types() {
+ return value;
}
- fn node_method_ty(&self, method_call: ty::MethodCall)
- -> Option<Ty<'tcx>> {
- self.tables
- .borrow()
- .method_map
- .get(&method_call)
- .map(|method| method.ty)
- .map(|ty| self.resolve_type_vars_if_possible(&ty))
- }
+ let infcx = new_infer_ctxt(tcx, &tcx.tables, None, true);
+ let mut selcx = traits::SelectionContext::new(&infcx);
+ let cause = traits::ObligationCause::dummy();
+ let traits::Normalized { value: result, obligations } =
+ traits::normalize(&mut selcx, cause, &value);
- fn node_method_origin(&self, method_call: ty::MethodCall)
- -> Option<ty::MethodOrigin<'tcx>>
- {
- self.tables
- .borrow()
- .method_map
- .get(&method_call)
- .map(|method| method.origin.clone())
- }
+ debug!("normalize_associated_type: result={:?} obligations={:?}",
+ result,
+ obligations);
- fn adjustments(&self) -> Ref<NodeMap<ty::AutoAdjustment<'tcx>>> {
- fn project_adjustments<'a, 'tcx>(tables: &'a ty::Tables<'tcx>)
- -> &'a NodeMap<ty::AutoAdjustment<'tcx>> {
- &tables.adjustments
- }
+ let mut fulfill_cx = infcx.fulfillment_cx.borrow_mut();
- Ref::map(self.tables.borrow(), project_adjustments)
+ for obligation in obligations {
+ fulfill_cx.register_predicate_obligation(&infcx, obligation);
}
- fn is_method_call(&self, id: ast::NodeId) -> bool {
- self.tables.borrow().method_map.contains_key(&ty::MethodCall::expr(id))
- }
+ let result = drain_fulfillment_cx_or_panic(DUMMY_SP, &infcx, &mut fulfill_cx, &result);
- fn temporary_scope(&self, rvalue_id: ast::NodeId) -> Option<CodeExtent> {
- self.parameter_environment.temporary_scope(rvalue_id)
- }
+ result
+}
- fn upvar_capture(&self, upvar_id: ty::UpvarId) -> Option<ty::UpvarCapture> {
- self.tables.borrow().upvar_capture_map.get(&upvar_id).cloned()
+pub fn drain_fulfillment_cx_or_panic<'a,'tcx,T>(span: Span,
+ infcx: &InferCtxt<'a,'tcx>,
+ fulfill_cx: &mut traits::FulfillmentContext<'tcx>,
+ result: &T)
+ -> T
+ where T : TypeFoldable<'tcx>
+{
+ match drain_fulfillment_cx(infcx, fulfill_cx, result) {
+ Ok(v) => v,
+ Err(errors) => {
+ infcx.tcx.sess.span_bug(
+ span,
+ &format!("Encountered errors `{:?}` fulfilling during trans",
+ errors));
+ }
}
}
-impl<'a, 'tcx> ty::ClosureTyper<'tcx> for InferCtxt<'a, 'tcx> {
- fn param_env<'b>(&'b self) -> &'b ty::ParameterEnvironment<'b,'tcx> {
- &self.parameter_environment
+/// Finishes processes any obligations that remain in the fulfillment
+/// context, and then "freshens" and returns `result`. This is
+/// primarily used during normalization and other cases where
+/// processing the obligations in `fulfill_cx` may cause type
+/// inference variables that appear in `result` to be unified, and
+/// hence we need to process those obligations to get the complete
+/// picture of the type.
+pub fn drain_fulfillment_cx<'a,'tcx,T>(infcx: &InferCtxt<'a,'tcx>,
+ fulfill_cx: &mut traits::FulfillmentContext<'tcx>,
+ result: &T)
+ -> Result<T,Vec<traits::FulfillmentError<'tcx>>>
+ where T : TypeFoldable<'tcx>
+{
+ debug!("drain_fulfillment_cx(result={:?})",
+ result);
+
+ // In principle, we only need to do this so long as `result`
+ // contains unbound type parameters. It could be a slight
+ // optimization to stop iterating early.
+ match fulfill_cx.select_all_or_error(infcx) {
+ Ok(()) => { }
+ Err(errors) => {
+ return Err(errors);
+ }
}
- fn closure_kind(&self,
- def_id: ast::DefId)
- -> Option<ty::ClosureKind>
- {
- self.tables.borrow().closure_kinds.get(&def_id).cloned()
- }
+ // Use freshen to simultaneously replace all type variables with
+ // their bindings and replace all regions with 'static. This is
+ // sort of overkill because we do not expect there to be any
+ // unbound type variables, hence no `TyFresh` types should ever be
+ // inserted.
+ Ok(result.fold_with(&mut infcx.freshener()))
+}
- fn closure_type(&self,
- def_id: ast::DefId,
- substs: &subst::Substs<'tcx>)
- -> ty::ClosureTy<'tcx>
- {
+/// Returns an equivalent value with all free regions removed (note
+/// that late-bound regions remain, because they are important for
+/// subtyping, but they are anonymized and normalized as well). This
+/// is a stronger, caching version of `ty_fold::erase_regions`.
+pub fn erase_regions<'tcx,T>(cx: &ty::ctxt<'tcx>, value: &T) -> T
+ where T : TypeFoldable<'tcx>
+{
+ let value1 = value.fold_with(&mut RegionEraser(cx));
+ debug!("erase_regions({:?}) = {:?}",
+ value, value1);
+ return value1;
- let closure_ty = self.tables
- .borrow()
- .closure_tys
- .get(&def_id)
- .unwrap()
- .subst(self.tcx, substs);
+ struct RegionEraser<'a, 'tcx: 'a>(&'a ty::ctxt<'tcx>);
- if self.normalize {
- // NOTE: this flag is currently *always* set to false, we are slowly folding
- // normalization into this trait and will come back to remove this in the near
- // future.
-
- // code from NormalizingClosureTyper:
- // the substitutions in `substs` are already monomorphized,
- // but we still must normalize associated types
- // normalize_associated_type(self.param_env.tcx, &closure_ty)
- panic!("see issue 26597: fufillment context refactor must occur")
- } else {
- closure_ty
+ impl<'a, 'tcx> TypeFolder<'tcx> for RegionEraser<'a, 'tcx> {
+ fn tcx(&self) -> &ty::ctxt<'tcx> { self.0 }
+
+ fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> {
+ match self.tcx().normalized_cache.borrow().get(&ty).cloned() {
+ None => {}
+ Some(u) => return u
+ }
+
+ let t_norm = ty_fold::super_fold_ty(self, ty);
+ self.tcx().normalized_cache.borrow_mut().insert(ty, t_norm);
+ return t_norm;
}
- }
- fn closure_upvars(&self,
- def_id: ast::DefId,
- substs: &Substs<'tcx>)
- -> Option<Vec<ty::ClosureUpvar<'tcx>>>
- {
- let result = ty::ctxt::closure_upvars(self, def_id, substs);
+ fn fold_binder<T>(&mut self, t: &ty::Binder<T>) -> ty::Binder<T>
+ where T : TypeFoldable<'tcx>
+ {
+ let u = self.tcx().anonymize_late_bound_regions(t);
+ ty_fold::super_fold_binder(self, &u)
+ }
- if self.normalize {
- // NOTE: this flag is currently *always* set to false, we are slowly folding
- // normalization into this trait and will come back to remove this in the near
- // future.
-
- // code from NormalizingClosureTyper:
- // the substitutions in `substs` are already monomorphized,
- // but we still must normalize associated types
- // monomorphize::normalize_associated_type(self.param_env.tcx, &result)
- panic!("see issue 26597: fufillment context refactor must occur")
- } else {
- result
+ fn fold_region(&mut self, r: ty::Region) -> ty::Region {
+ // because late-bound regions affect subtyping, we can't
+ // erase the bound/free distinction, but we can replace
+ // all free regions with 'static.
+ //
+ // Note that we *CAN* replace early-bound regions -- the
+ // type system never "sees" those, they get substituted
+ // away. In trans, they will always be erased to 'static
+ // whenever a substitution occurs.
+ match r {
+ ty::ReLateBound(..) => r,
+ _ => ty::ReStatic
+ }
+ }
+
+ fn fold_substs(&mut self,
+ substs: &subst::Substs<'tcx>)
+ -> subst::Substs<'tcx> {
+ subst::Substs { regions: subst::ErasedRegions,
+ types: substs.types.fold_with(self) }
}
}
}
.map(|method| resolve_ty(method.ty)))
}
- pub fn node_ty(&self, id: ast::NodeId) -> Ty<'tcx> {
+ pub fn node_type(&self, id: ast::NodeId) -> Ty<'tcx> {
match self.tables.borrow().node_types.get(&id) {
Some(&t) => t,
// FIXME
self.equate(true, trace).relate(a, b)
}).map(|_| ())
}
+
+ pub fn node_ty(&self, id: ast::NodeId) -> McResult<Ty<'tcx>> {
+ let ty = self.node_type(id);
+ self.resolve_type_vars_or_error(&ty)
+ }
+
+ pub fn expr_ty_adjusted(&self, expr: &ast::Expr) -> McResult<Ty<'tcx>> {
+ let ty = self.adjust_expr_ty(expr, self.tables.borrow().adjustments.get(&expr.id));
+ self.resolve_type_vars_or_error(&ty)
+ }
+
+ pub fn type_moves_by_default(&self, ty: Ty<'tcx>, span: Span) -> bool {
+ let ty = self.resolve_type_vars_if_possible(&ty);
+ !traits::type_known_to_meet_builtin_bound(self, ty, ty::BoundCopy, span)
+ // FIXME(@jroesch): should be able to use:
+ // ty.moves_by_default(&self.parameter_environment, span)
+ }
+
+ pub fn node_method_ty(&self, method_call: ty::MethodCall)
+ -> Option<Ty<'tcx>> {
+ self.tables
+ .borrow()
+ .method_map
+ .get(&method_call)
+ .map(|method| method.ty)
+ .map(|ty| self.resolve_type_vars_if_possible(&ty))
+ }
+
+ pub fn node_method_origin(&self, method_call: ty::MethodCall)
+ -> Option<ty::MethodOrigin<'tcx>>
+ {
+ self.tables
+ .borrow()
+ .method_map
+ .get(&method_call)
+ .map(|method| method.origin.clone())
+ }
+
+ pub fn adjustments(&self) -> Ref<NodeMap<ty::AutoAdjustment<'tcx>>> {
+ fn project_adjustments<'a, 'tcx>(tables: &'a ty::Tables<'tcx>)
+ -> &'a NodeMap<ty::AutoAdjustment<'tcx>> {
+ &tables.adjustments
+ }
+
+ Ref::map(self.tables.borrow(), project_adjustments)
+ }
+
+ pub fn is_method_call(&self, id: ast::NodeId) -> bool {
+ self.tables.borrow().method_map.contains_key(&ty::MethodCall::expr(id))
+ }
+
+ pub fn temporary_scope(&self, rvalue_id: ast::NodeId) -> Option<CodeExtent> {
+ self.tcx.region_maps.temporary_scope(rvalue_id)
+ }
+
+ pub fn upvar_capture(&self, upvar_id: ty::UpvarId) -> Option<ty::UpvarCapture> {
+ self.tables.borrow().upvar_capture_map.get(&upvar_id).cloned()
+ }
+
+ pub fn param_env<'b>(&'b self) -> &'b ty::ParameterEnvironment<'b,'tcx> {
+ &self.parameter_environment
+ }
+
+ pub fn closure_kind(&self,
+ def_id: ast::DefId)
+ -> Option<ty::ClosureKind>
+ {
+ self.tables.borrow().closure_kinds.get(&def_id).cloned()
+ }
+
+ pub fn closure_type(&self,
+ def_id: ast::DefId,
+ substs: &subst::Substs<'tcx>)
+ -> ty::ClosureTy<'tcx>
+ {
+
+ let closure_ty = self.tables
+ .borrow()
+ .closure_tys
+ .get(&def_id)
+ .unwrap()
+ .subst(self.tcx, substs);
+
+ if self.normalize {
+ normalize_associated_type(&self.tcx, &closure_ty)
+ } else {
+ closure_ty
+ }
+ }
+
+ pub fn closure_upvars(&self,
+ def_id: ast::DefId,
+ substs: &Substs<'tcx>)
+ -> Option<Vec<ty::ClosureUpvar<'tcx>>>
+ {
+ let result = ty::ctxt::closure_upvars(self, def_id, substs);
+
+ if self.normalize {
+ normalize_associated_type(&self.tcx, &result)
+ } else {
+ result
+ }
+ }
}
impl<'tcx> TypeTrace<'tcx> {
use self::VarKind::*;
use middle::def::*;
-use middle::mem_categorization::Typer;
use middle::pat_util;
use middle::region;
use middle::ty;
-use middle::ty::ClosureTyper;
use lint;
use util::nodemap::NodeMap;
use self::Aliasability::*;
use ast_map;
+use middle::infer;
use middle::check_const;
use middle::def;
use middle::region;
use middle::ty::{self, Ty};
-use util::nodemap::NodeMap;
use syntax::ast::{MutImmutable, MutMutable};
use syntax::ast;
use syntax::codemap::Span;
-use std::cell::Ref;
use std::fmt;
use std::rc::Rc;
fn span(&self) -> Span { self.span }
}
-pub struct MemCategorizationContext<'t,TYPER:'t> {
- typer: &'t TYPER
-}
-
-impl<'t,TYPER:'t> Copy for MemCategorizationContext<'t,TYPER> {}
-impl<'t,TYPER:'t> Clone for MemCategorizationContext<'t,TYPER> {
- fn clone(&self) -> MemCategorizationContext<'t,TYPER> { *self }
+#[derive(Copy, Clone)]
+pub struct MemCategorizationContext<'t, 'a: 't, 'tcx : 'a> {
+ pub typer: &'t infer::InferCtxt<'a, 'tcx>,
}
pub type McResult<T> = Result<T, ()>;
-/// The `Typer` trait provides the interface for the mem-categorization
-/// module to the results of the type check. It can be used to query
-/// the type assigned to an expression node, to inquire after adjustments,
-/// and so on.
-///
-/// This interface is needed because mem-categorization is used from
-/// two places: `regionck` and `borrowck`. `regionck` executes before
-/// type inference is complete, and hence derives types and so on from
-/// intermediate tables. This also implies that type errors can occur,
-/// and hence `node_ty()` and friends return a `Result` type -- any
-/// error will propagate back up through the mem-categorization
-/// routines.
-///
-/// In the borrow checker, in contrast, type checking is complete and we
-/// know that no errors have occurred, so we simply consult the tcx and we
-/// can be sure that only `Ok` results will occur.
-pub trait Typer<'tcx> : ty::ClosureTyper<'tcx> {
- fn node_ty(&self, id: ast::NodeId) -> McResult<Ty<'tcx>>;
- fn expr_ty_adjusted(&self, expr: &ast::Expr) -> McResult<Ty<'tcx>>;
- fn type_moves_by_default(&self, ty: Ty<'tcx>, span: Span) -> bool;
- fn node_method_ty(&self, method_call: ty::MethodCall) -> Option<Ty<'tcx>>;
- fn node_method_origin(&self, method_call: ty::MethodCall)
- -> Option<ty::MethodOrigin<'tcx>>;
- fn adjustments(&self) -> Ref<NodeMap<ty::AutoAdjustment<'tcx>>>;
- fn is_method_call(&self, id: ast::NodeId) -> bool;
- fn temporary_scope(&self, rvalue_id: ast::NodeId) -> Option<region::CodeExtent>;
- fn upvar_capture(&self, upvar_id: ty::UpvarId) -> Option<ty::UpvarCapture>;
-}
-
impl MutabilityCategory {
pub fn from_mutbl(m: ast::Mutability) -> MutabilityCategory {
let ret = match m {
}
}
-impl<'t,'tcx,TYPER:Typer<'tcx>> MemCategorizationContext<'t,TYPER> {
- pub fn new(typer: &'t TYPER) -> MemCategorizationContext<'t,TYPER> {
+impl<'t, 'a,'tcx> MemCategorizationContext<'t, 'a, 'tcx> {
+ pub fn new(typer: &'t infer::InferCtxt<'a, 'tcx>) -> MemCategorizationContext<'t, 'a, 'tcx> {
MemCategorizationContext { typer: typer }
}
- fn tcx(&self) -> &'t ty::ctxt<'tcx> {
- self.typer.tcx()
+ fn tcx(&self) -> &'a ty::ctxt<'tcx> {
+ self.typer.tcx
}
fn expr_ty(&self, expr: &ast::Expr) -> McResult<Ty<'tcx>> {
}
pub fn cat_pattern<F>(&self, cmt: cmt<'tcx>, pat: &ast::Pat, mut op: F) -> McResult<()>
- where F: FnMut(&MemCategorizationContext<'t, TYPER>, cmt<'tcx>, &ast::Pat),
+ where F: FnMut(&MemCategorizationContext<'t, 'a, 'tcx>, cmt<'tcx>, &ast::Pat),
{
self.cat_pattern_(cmt, pat, &mut op)
}
// FIXME(#19596) This is a workaround, but there should be a better way to do this
fn cat_pattern_<F>(&self, cmt: cmt<'tcx>, pat: &ast::Pat, op: &mut F)
-> McResult<()>
- where F : FnMut(&MemCategorizationContext<'t, TYPER>, cmt<'tcx>, &ast::Pat),
+ where F : FnMut(&MemCategorizationContext<'t, 'a, 'tcx>, cmt<'tcx>, &ast::Pat),
{
// Here, `cmt` is the categorization for the value being
// matched and pat is the pattern it is being matched against.
impl1_def_id,
impl2_def_id);
- let param_env = &infcx.tcx.empty_parameter_environment();
- let selcx = &mut SelectionContext::intercrate(infcx, param_env);
+ let selcx = &mut SelectionContext::intercrate(infcx);
infcx.probe(|_| {
overlap(selcx, impl1_def_id, impl2_def_id) || overlap(selcx, impl2_def_id, impl1_def_id)
})
// particular node-id).
region_obligations: NodeMap<Vec<RegionObligation<'tcx>>>,
- errors_will_be_reported: bool,
+ pub errors_will_be_reported: bool,
}
#[derive(Clone)]
/// `projection_ty` again.
pub fn normalize_projection_type<'a>(&mut self,
infcx: &InferCtxt<'a,'tcx>,
- typer: &ty::ClosureTyper<'tcx>,
projection_ty: ty::ProjectionTy<'tcx>,
cause: ObligationCause<'tcx>)
-> Ty<'tcx>
// FIXME(#20304) -- cache
- let mut selcx = SelectionContext::new(infcx, typer);
+ let mut selcx = SelectionContext::new(infcx);
let normalized = project::normalize_projection_type(&mut selcx, projection_ty, cause, 0);
for obligation in normalized.obligations {
}
pub fn select_all_or_error<'a>(&mut self,
- infcx: &InferCtxt<'a,'tcx>,
- typer: &ty::ClosureTyper<'tcx>)
+ infcx: &InferCtxt<'a,'tcx>)
-> Result<(),Vec<FulfillmentError<'tcx>>>
{
- try!(self.select_where_possible(infcx, typer));
+ try!(self.select_where_possible(infcx));
// Anything left is ambiguous.
let errors: Vec<FulfillmentError> =
/// gaining type information. It'd be equally valid to use `select_where_possible` but it
/// results in `O(n^2)` performance (#18208).
pub fn select_new_obligations<'a>(&mut self,
- infcx: &InferCtxt<'a,'tcx>,
- typer: &ty::ClosureTyper<'tcx>)
+ infcx: &InferCtxt<'a,'tcx>)
-> Result<(),Vec<FulfillmentError<'tcx>>>
{
- let mut selcx = SelectionContext::new(infcx, typer);
+ let mut selcx = SelectionContext::new(infcx);
self.select(&mut selcx, true)
}
pub fn select_where_possible<'a>(&mut self,
- infcx: &InferCtxt<'a,'tcx>,
- typer: &ty::ClosureTyper<'tcx>)
+ infcx: &InferCtxt<'a,'tcx>)
-> Result<(),Vec<FulfillmentError<'tcx>>>
{
- let mut selcx = SelectionContext::new(infcx, typer);
+ let mut selcx = SelectionContext::new(infcx);
self.select(&mut selcx, false)
}
// regions. If there are, we will call this obligation an
// error. Eventually we should be able to support some
// cases here, I imagine (e.g., `for<'a> int : 'a`).
- if selcx.tcx().count_late_bound_regions(binder) != 0 {
- errors.push(
- FulfillmentError::new(
- obligation.clone(),
- CodeSelectionError(Unimplemented)));
- } else {
- let ty::OutlivesPredicate(t_a, r_b) = binder.0;
- register_region_obligation(t_a, r_b,
- obligation.cause.clone(),
- region_obligations);
+ match selcx.tcx().no_late_bound_regions(binder) {
+ None => {
+ errors.push(
+ FulfillmentError::new(
+ obligation.clone(),
+ CodeSelectionError(Unimplemented)))
+ }
+ Some(ty::OutlivesPredicate(t_a, r_b)) => {
+ register_region_obligation(t_a, r_b,
+ obligation.cause.clone(),
+ region_obligations);
+ }
}
true
}
!self.set.insert(p.clone())
}
}
-
-
/// conservative towards *no impl*, which is the opposite of the
/// `evaluate` methods).
pub fn type_known_to_meet_builtin_bound<'a,'tcx>(infcx: &InferCtxt<'a,'tcx>,
- typer: &ty::ClosureTyper<'tcx>,
ty: Ty<'tcx>,
bound: ty::BuiltinBound,
span: Span)
// Note: we only assume something is `Copy` if we can
// *definitively* show that it implements `Copy`. Otherwise,
// assume it is move; linear is always ok.
- match fulfill_cx.select_all_or_error(infcx, typer) {
+ match fulfill_cx.select_all_or_error(infcx) {
Ok(()) => {
debug!("type_known_to_meet_builtin_bound: ty={:?} bound={:?} success",
ty,
let elaborated_env = unnormalized_env.with_caller_bounds(predicates);
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, Some(elaborated_env));
- let predicates = match fully_normalize(&infcx, &infcx.parameter_environment, cause,
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, Some(elaborated_env), false);
+ let predicates = match fully_normalize(&infcx, cause,
&infcx.parameter_environment.caller_bounds) {
Ok(predicates) => predicates,
Err(errors) => {
}
pub fn fully_normalize<'a,'tcx,T>(infcx: &InferCtxt<'a,'tcx>,
- closure_typer: &ty::ClosureTyper<'tcx>,
cause: ObligationCause<'tcx>,
value: &T)
-> Result<T, Vec<FulfillmentError<'tcx>>>
{
debug!("normalize_param_env(value={:?})", value);
- let mut selcx = &mut SelectionContext::new(infcx, closure_typer);
+ let mut selcx = &mut SelectionContext::new(infcx);
+ // FIXME (@jroesch) ISSUE 26721
+ // I'm not sure if this is a bug or not, needs further investigation.
+ // It appears that by reusing the fulfillment_cx here we incur more
+ // obligations and later trip an asssertion on regionck.rs line 337.
+ //
+ // The two possibilities I see is:
+ // - normalization is not actually fully happening and we
+ // have a bug else where
+ // - we are adding a duplicate bound into the list causing
+ // its size to change.
+ //
+ // I think we should probably land this refactor and then come
+ // back to this is a follow-up patch.
let mut fulfill_cx = FulfillmentContext::new(false);
+
let Normalized { value: normalized_value, obligations } =
project::normalize(selcx, cause, value);
debug!("normalize_param_env: normalized_value={:?} obligations={:?}",
for obligation in obligations {
fulfill_cx.register_predicate_obligation(selcx.infcx(), obligation);
}
- try!(fulfill_cx.select_all_or_error(infcx, closure_typer));
+
+ try!(fulfill_cx.select_all_or_error(infcx));
let resolved_value = infcx.resolve_type_vars_if_possible(&normalized_value);
debug!("normalize_param_env: resolved_value={:?}", resolved_value);
Ok(resolved_value)
// ought to be reported by the type checker method
// `check_impl_items_against_trait`, so here we
// just return TyError.
+ debug!("confirm_impl_candidate: no associated type {:?} for {:?}",
+ assoc_ty.name,
+ trait_ref);
return (selcx.tcx().types.err, vec!());
}
}
pub struct SelectionContext<'cx, 'tcx:'cx> {
infcx: &'cx InferCtxt<'cx, 'tcx>,
- closure_typer: &'cx (ty::ClosureTyper<'tcx>+'cx),
-
/// Freshener used specifically for skolemizing entries on the
/// obligation stack. This ensures that all entries on the stack
/// at one time will have the same set of skolemized entries,
}
impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
- pub fn new(infcx: &'cx InferCtxt<'cx, 'tcx>,
- closure_typer: &'cx ty::ClosureTyper<'tcx>)
+ pub fn new(infcx: &'cx InferCtxt<'cx, 'tcx>)
-> SelectionContext<'cx, 'tcx> {
SelectionContext {
infcx: infcx,
- closure_typer: closure_typer,
freshener: infcx.freshener(),
intercrate: false,
}
}
- pub fn intercrate(infcx: &'cx InferCtxt<'cx, 'tcx>,
- closure_typer: &'cx ty::ClosureTyper<'tcx>)
+ pub fn intercrate(infcx: &'cx InferCtxt<'cx, 'tcx>)
-> SelectionContext<'cx, 'tcx> {
SelectionContext {
infcx: infcx,
- closure_typer: closure_typer,
freshener: infcx.freshener(),
intercrate: true,
}
}
pub fn param_env(&self) -> &'cx ty::ParameterEnvironment<'cx, 'tcx> {
- self.closure_typer.param_env()
+ self.infcx.param_env()
}
- pub fn closure_typer(&self) -> &'cx (ty::ClosureTyper<'tcx>+'cx) {
- self.closure_typer
+ pub fn closure_typer(&self) -> &'cx InferCtxt<'cx, 'tcx> {
+ self.infcx
}
///////////////////////////////////////////////////////////////////////////
kind,
obligation);
- match self.closure_typer.closure_kind(closure_def_id) {
+ match self.infcx.closure_kind(closure_def_id) {
Some(closure_kind) => {
debug!("assemble_unboxed_candidates: closure_kind = {:?}", closure_kind);
if closure_kind.extends(kind) {
return ok_if(Vec::new());
}
- match self.closure_typer.closure_upvars(def_id, substs) {
+ match self.infcx.closure_upvars(def_id, substs) {
Some(upvars) => ok_if(upvars.iter().map(|c| c.ty).collect()),
None => {
debug!("assemble_builtin_bound_candidates: no upvar types available yet");
ty::TyClosure(def_id, substs) => {
assert_eq!(def_id.krate, ast::LOCAL_CRATE);
- match self.closure_typer.closure_upvars(def_id, substs) {
+ match self.infcx.closure_upvars(def_id, substs) {
Some(upvars) => {
Some(upvars.iter().map(|c| c.ty).collect())
}
substs: &Substs<'tcx>)
-> ty::PolyTraitRef<'tcx>
{
- let closure_type = self.closure_typer.closure_type(closure_def_id, substs);
+ let closure_type = self.infcx.closure_type(closure_def_id, substs);
let ty::Binder((trait_ref, _)) =
util::closure_trait_ref_and_return_type(self.tcx(),
obligation.predicate.def_id(),
use middle::fast_reject;
use middle::free_region::FreeRegionMap;
use middle::lang_items::{FnTraitLangItem, FnMutTraitLangItem, FnOnceTraitLangItem};
-use middle::mem_categorization as mc;
-use middle::mem_categorization::Typer;
use middle::region;
use middle::resolve_lifetime;
use middle::infer;
_ => false,
}
}
+
+ /// Returns the depth of `self` from the (1-based) binding level `depth`
+ pub fn from_depth(&self, depth: u32) -> Region {
+ match *self {
+ ty::ReLateBound(debruijn, r) => ty::ReLateBound(DebruijnIndex {
+ depth: debruijn.depth - (depth - 1)
+ }, r),
+ r => r
+ }
+ }
}
#[derive(Clone, PartialEq, PartialOrd, Eq, Ord, Hash,
-> Result<(),CopyImplementationError> {
let tcx = self.tcx;
+ // FIXME: (@jroesch) float this code up
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, Some(self.clone()), false);
+
let did = match self_type.sty {
ty::TyStruct(struct_did, substs) => {
let fields = tcx.struct_fields(struct_did, substs);
for field in &fields {
- if self.type_moves_by_default(field.mt.ty, span) {
+ if infcx.type_moves_by_default(field.mt.ty, span) {
return Err(FieldDoesNotImplementCopy(field.name))
}
}
for variant_arg_type in &variant.args {
let substd_arg_type =
variant_arg_type.subst(tcx, substs);
- if self.type_moves_by_default(substd_arg_type, span) {
+ if infcx.type_moves_by_default(substd_arg_type, span) {
return Err(VariantDoesNotImplementCopy(variant.name))
}
}
}
}
-pub trait ClosureTyper<'tcx> {
- fn tcx(&self) -> &ctxt<'tcx> {
- self.param_env().tcx
- }
-
- fn param_env<'a>(&'a self) -> &'a ty::ParameterEnvironment<'a, 'tcx>;
-
- /// Is this a `Fn`, `FnMut` or `FnOnce` closure? During typeck,
- /// returns `None` if the kind of this closure has not yet been
- /// inferred.
- fn closure_kind(&self,
- def_id: ast::DefId)
- -> Option<ty::ClosureKind>;
-
- /// Returns the argument/return types of this closure.
- fn closure_type(&self,
- def_id: ast::DefId,
- substs: &subst::Substs<'tcx>)
- -> ty::ClosureTy<'tcx>;
-
- /// Returns the set of all upvars and their transformed
- /// types. During typeck, maybe return `None` if the upvar types
- /// have not yet been inferred.
- fn closure_upvars(&self,
- def_id: ast::DefId,
- substs: &Substs<'tcx>)
- -> Option<Vec<ClosureUpvar<'tcx>>>;
-}
-
impl<'tcx> CommonTypes<'tcx> {
fn new(arena: &'tcx TypedArena<TyS<'tcx>>,
- interner: &mut FnvHashMap<InternedTy<'tcx>, Ty<'tcx>>)
+ interner: &RefCell<FnvHashMap<InternedTy<'tcx>, Ty<'tcx>>>)
-> CommonTypes<'tcx>
{
- let mut mk = |sty| ctxt::intern_ty(arena, interner, sty);
+ let mk = |sty| ctxt::intern_ty(arena, interner, sty);
CommonTypes {
bool: mk(TyBool),
char: mk(TyChar),
f: F) -> (Session, R)
where F: FnOnce(&ctxt<'tcx>) -> R
{
- let mut interner = FnvHashMap();
- let common_types = CommonTypes::new(&arenas.type_, &mut interner);
+ let interner = RefCell::new(FnvHashMap());
+ let common_types = CommonTypes::new(&arenas.type_, &interner);
tls::enter(ctxt {
arenas: arenas,
- interner: RefCell::new(interner),
+ interner: interner,
substs_interner: RefCell::new(FnvHashMap()),
bare_fn_interner: RefCell::new(FnvHashMap()),
region_interner: RefCell::new(FnvHashMap()),
}
fn intern_ty(type_arena: &'tcx TypedArena<TyS<'tcx>>,
- interner: &mut FnvHashMap<InternedTy<'tcx>, Ty<'tcx>>,
+ interner: &RefCell<FnvHashMap<InternedTy<'tcx>, Ty<'tcx>>>,
st: TypeVariants<'tcx>)
-> Ty<'tcx> {
- match interner.get(&st) {
- Some(ty) => return *ty,
- _ => ()
- }
+ let ty: Ty /* don't be &mut TyS */ = {
+ let mut interner = interner.borrow_mut();
+ match interner.get(&st) {
+ Some(ty) => return *ty,
+ _ => ()
+ }
+
+ let flags = FlagComputation::for_sty(&st);
- let flags = FlagComputation::for_sty(&st);
+ let ty = match () {
+ () => type_arena.alloc(TyS { sty: st,
+ flags: Cell::new(flags.flags),
+ region_depth: flags.depth, }),
+ };
- let ty = match () {
- () => type_arena.alloc(TyS { sty: st,
- flags: Cell::new(flags.flags),
- region_depth: flags.depth, }),
+ interner.insert(InternedTy { ty: ty }, ty);
+ ty
};
debug!("Interned type: {:?} Pointer: {:?}",
ty, ty as *const TyS);
-
- interner.insert(InternedTy { ty: ty }, ty);
-
ty
}
// Interns a type/name combination, stores the resulting box in cx.interner,
// and returns the box as cast to an unsafe ptr (see comments for Ty above).
pub fn mk_ty(&self, st: TypeVariants<'tcx>) -> Ty<'tcx> {
- let mut interner = self.interner.borrow_mut();
- ctxt::intern_ty(&self.arenas.type_, &mut *interner, st)
+ ctxt::intern_ty(&self.arenas.type_, &self.interner, st)
}
pub fn mk_mach_int(&self, tm: ast::IntTy) -> Ty<'tcx> {
TyClosure(did, substs) => {
// FIXME(#14449): `borrowed_contents` below assumes `&mut` closure.
let param_env = cx.empty_parameter_environment();
- let upvars = param_env.closure_upvars(did, substs).unwrap();
+ let infcx = infer::new_infer_ctxt(cx, &cx.tables, Some(param_env), false);
+ let upvars = infcx.closure_upvars(did, substs).unwrap();
TypeContents::union(&upvars, |f| tc_ty(cx, &f.ty, cache))
}
span: Span)
-> bool
{
- let tcx = param_env.tcx();
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, Some(param_env.clone()));
+ let tcx = param_env.tcx;
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, Some(param_env.clone()), false);
- let is_impld = traits::type_known_to_meet_builtin_bound(&infcx, param_env,
+ let is_impld = traits::type_known_to_meet_builtin_bound(&infcx,
self, bound, span);
debug!("Ty::impls_bound({:?}, {:?}) = {:?}",
is_impld
}
- fn moves_by_default<'a>(&'tcx self, param_env: &ParameterEnvironment<'a,'tcx>,
+ // FIXME (@jroesch): I made this public to use it, not sure if should be private
+ pub fn moves_by_default<'a>(&'tcx self, param_env: &ParameterEnvironment<'a,'tcx>,
span: Span) -> bool {
if self.flags.get().intersects(TypeFlags::MOVENESS_CACHED) {
return self.flags.get().intersects(TypeFlags::MOVES_BY_DEFAULT);
.clone()
}
+ // Register a given item type
+ pub fn register_item_type(&self, did: ast::DefId, ty: TypeScheme<'tcx>) {
+ self.tcache.borrow_mut().insert(did, ty);
+ }
// If the given item is in an external crate, looks up its type and adds it to
// the type cache. Returns the type parameters and type.
if id.krate == ast::LOCAL_CRATE {
self.node_id_to_type(id.node)
} else {
- let mut tcache = self.tcache.borrow_mut();
- tcache.entry(id).or_insert_with(|| csearch::get_field_type(self, struct_id, id)).ty
+ memoized(&self.tcache, id,
+ |id| csearch::get_field_type(self, struct_id, id)).ty
}
}
}
// Returns a list of `ClosureUpvar`s for each upvar.
- pub fn closure_upvars(typer: &Typer<'tcx>,
+ pub fn closure_upvars<'a>(typer: &infer::InferCtxt<'a, 'tcx>,
closure_id: ast::DefId,
substs: &Substs<'tcx>)
-> Option<Vec<ClosureUpvar<'tcx>>>
// This may change if abstract return types of some sort are
// implemented.
assert!(closure_id.krate == ast::LOCAL_CRATE);
- let tcx = typer.tcx();
+ let tcx = typer.tcx;
match tcx.freevars.borrow().get(&closure_id.node) {
None => Some(vec![]),
Some(ref freevars) => {
}
}
-impl<'a,'tcx> Typer<'tcx> for ParameterEnvironment<'a,'tcx> {
- fn node_ty(&self, id: ast::NodeId) -> mc::McResult<Ty<'tcx>> {
- Ok(self.tcx.node_id_to_type(id))
- }
-
- fn expr_ty_adjusted(&self, expr: &ast::Expr) -> mc::McResult<Ty<'tcx>> {
- Ok(self.tcx.expr_ty_adjusted(expr))
- }
-
- fn node_method_ty(&self, method_call: ty::MethodCall) -> Option<Ty<'tcx>> {
- self.tcx.tables.borrow().method_map.get(&method_call).map(|method| method.ty)
- }
-
- fn node_method_origin(&self, method_call: ty::MethodCall)
- -> Option<ty::MethodOrigin<'tcx>>
- {
- self.tcx.tables.borrow().method_map.get(&method_call).map(|method| method.origin.clone())
- }
-
- fn adjustments(&self) -> Ref<NodeMap<ty::AutoAdjustment<'tcx>>> {
- fn projection<'a, 'tcx>(tables: &'a Tables<'tcx>) -> &'a NodeMap<ty::AutoAdjustment<'tcx>> {
- &tables.adjustments
- }
-
- Ref::map(self.tcx.tables.borrow(), projection)
- }
-
- fn is_method_call(&self, id: ast::NodeId) -> bool {
- self.tcx.is_method_call(id)
- }
-
- fn temporary_scope(&self, rvalue_id: ast::NodeId) -> Option<region::CodeExtent> {
- self.tcx.region_maps.temporary_scope(rvalue_id)
- }
-
- fn upvar_capture(&self, upvar_id: ty::UpvarId) -> Option<ty::UpvarCapture> {
- self.tcx.upvar_capture(upvar_id)
- }
-
- fn type_moves_by_default(&self, ty: Ty<'tcx>, span: Span) -> bool {
- ty.moves_by_default(self, span)
- }
-}
-
-impl<'a,'tcx> ClosureTyper<'tcx> for ty::ParameterEnvironment<'a,'tcx> {
- fn param_env<'b>(&'b self) -> &'b ty::ParameterEnvironment<'b,'tcx> {
- self
- }
-
- fn closure_kind(&self,
- def_id: ast::DefId)
- -> Option<ty::ClosureKind>
- {
- Some(self.tcx.closure_kind(def_id))
- }
-
- fn closure_type(&self,
- def_id: ast::DefId,
- substs: &subst::Substs<'tcx>)
- -> ty::ClosureTy<'tcx>
- {
- self.tcx.closure_type(def_id, substs)
- }
-
- fn closure_upvars(&self,
- def_id: ast::DefId,
- substs: &Substs<'tcx>)
- -> Option<Vec<ClosureUpvar<'tcx>>> {
- ctxt::closure_upvars(self, def_id, substs)
- }
-}
-
-
/// The category of explicit self.
#[derive(Clone, Copy, Eq, PartialEq, Debug)]
pub enum ExplicitSelfCategory {
ByBoxExplicitSelfCategory,
}
-impl<'tcx> TyS<'tcx> {
- /// Pushes all the lifetimes in the given type onto the given list. A
- /// "lifetime in a type" is a lifetime specified by a reference or a lifetime
- /// in a list of type substitutions. This does *not* traverse into nominal
- /// types, nor does it resolve fictitious types.
- pub fn accumulate_lifetimes_in_type(&self, accumulator: &mut Vec<ty::Region>) {
- for ty in self.walk() {
- match ty.sty {
- TyRef(region, _) => {
- accumulator.push(*region)
- }
- TyTrait(ref t) => {
- accumulator.push_all(t.principal.0.substs.regions().as_slice());
- }
- TyEnum(_, substs) |
- TyStruct(_, substs) => {
- accum_substs(accumulator, substs);
- }
- TyClosure(_, substs) => {
- accum_substs(accumulator, substs);
- }
- TyBool |
- TyChar |
- TyInt(_) |
- TyUint(_) |
- TyFloat(_) |
- TyBox(_) |
- TyStr |
- TyArray(_, _) |
- TySlice(_) |
- TyRawPtr(_) |
- TyBareFn(..) |
- TyTuple(_) |
- TyProjection(_) |
- TyParam(_) |
- TyInfer(_) |
- TyError => {
- }
- }
- }
-
- fn accum_substs(accumulator: &mut Vec<Region>, substs: &Substs) {
- match substs.regions {
- subst::ErasedRegions => {}
- subst::NonerasedRegions(ref regions) => {
- for region in regions {
- accumulator.push(*region)
- }
- }
- }
- }
- }
-}
-
/// A free variable referred to in a function.
#[derive(Copy, Clone, RustcEncodable, RustcDecodable)]
pub struct Freevar {
|br| ty::ReFree(ty::FreeRegion{scope: all_outlive_scope, bound_region: br})).0
}
- pub fn count_late_bound_regions<T>(&self, value: &Binder<T>) -> usize
- where T : TypeFoldable<'tcx>
- {
- let (_, skol_map) = ty_fold::replace_late_bound_regions(self, value, |_| ty::ReStatic);
- skol_map.len()
- }
-
- pub fn binds_late_bound_regions<T>(&self, value: &Binder<T>) -> bool
- where T : TypeFoldable<'tcx>
- {
- self.count_late_bound_regions(value) > 0
- }
-
/// Flattens two binding levels into one. So `for<'a> for<'b> Foo`
/// becomes `for<'a,'b> Foo`.
pub fn flatten_late_bound_regions<T>(&self, bound2_value: &Binder<Binder<T>>)
where T: TypeFoldable<'tcx>
{
let bound0_value = bound2_value.skip_binder().skip_binder();
- let value = ty_fold::fold_regions(self, bound0_value, |region, current_depth| {
+ let value = ty_fold::fold_regions(self, bound0_value, &mut false,
+ |region, current_depth| {
match region {
ty::ReLateBound(debruijn, br) if debruijn.depth >= current_depth => {
// should be true if no escaping regions from bound2_value
}
pub fn no_late_bound_regions<T>(&self, value: &Binder<T>) -> Option<T>
- where T : TypeFoldable<'tcx>
+ where T : TypeFoldable<'tcx> + RegionEscape
{
- if self.binds_late_bound_regions(value) {
+ if value.0.has_escaping_regions() {
None
} else {
Some(value.0.clone())
}
}
+impl<T:RegionEscape> RegionEscape for Vec<T> {
+ fn has_regions_escaping_depth(&self, depth: u32) -> bool {
+ self.iter().any(|t| t.has_regions_escaping_depth(depth))
+ }
+}
+
+impl<'tcx> RegionEscape for FnSig<'tcx> {
+ fn has_regions_escaping_depth(&self, depth: u32) -> bool {
+ self.inputs.has_regions_escaping_depth(depth) ||
+ self.output.has_regions_escaping_depth(depth)
+ }
+}
+
impl<'tcx,T:RegionEscape> RegionEscape for VecPerParamSpace<T> {
fn has_regions_escaping_depth(&self, depth: u32) -> bool {
self.iter_enumerated().any(|(space, _, t)| {
}
}
+impl<'tcx> RegionEscape for FnOutput<'tcx> {
+ fn has_regions_escaping_depth(&self, depth: u32) -> bool {
+ match *self {
+ FnConverging(t) => t.has_regions_escaping_depth(depth),
+ FnDiverging => false
+ }
+ }
+}
+
impl<'tcx> RegionEscape for EquatePredicate<'tcx> {
fn has_regions_escaping_depth(&self, depth: u32) -> bool {
self.0.has_regions_escaping_depth(depth) || self.1.has_regions_escaping_depth(depth)
use syntax::abi;
use syntax::ast;
use syntax::owned_slice::OwnedSlice;
-use util::nodemap::FnvHashMap;
+use util::nodemap::{FnvHashMap, FnvHashSet};
///////////////////////////////////////////////////////////////////////////
// Two generic traits
pub struct RegionFolder<'a, 'tcx: 'a> {
tcx: &'a ty::ctxt<'tcx>,
+ skipped_regions: &'a mut bool,
current_depth: u32,
fld_r: &'a mut (FnMut(ty::Region, u32) -> ty::Region + 'a),
}
impl<'a, 'tcx> RegionFolder<'a, 'tcx> {
- pub fn new<F>(tcx: &'a ty::ctxt<'tcx>, fld_r: &'a mut F) -> RegionFolder<'a, 'tcx>
+ pub fn new<F>(tcx: &'a ty::ctxt<'tcx>,
+ skipped_regions: &'a mut bool,
+ fld_r: &'a mut F) -> RegionFolder<'a, 'tcx>
where F : FnMut(ty::Region, u32) -> ty::Region
{
RegionFolder {
tcx: tcx,
+ skipped_regions: skipped_regions,
current_depth: 1,
fld_r: fld_r,
}
}
}
-pub fn collect_regions<'tcx,T>(tcx: &ty::ctxt<'tcx>, value: &T) -> Vec<ty::Region>
+/// Collects the free and escaping regions in `value` into `region_set`. Returns
+/// whether any late-bound regions were skipped
+pub fn collect_regions<'tcx,T>(tcx: &ty::ctxt<'tcx>,
+ value: &T,
+ region_set: &mut FnvHashSet<ty::Region>) -> bool
where T : TypeFoldable<'tcx>
{
- let mut vec = Vec::new();
- fold_regions(tcx, value, |r, _| { vec.push(r); r });
- vec
+ let mut have_bound_regions = false;
+ fold_regions(tcx, value, &mut have_bound_regions,
+ |r, d| { region_set.insert(r.from_depth(d)); r });
+ have_bound_regions
}
+/// Folds the escaping and free regions in `value` using `f`, and
+/// sets `skipped_regions` to true if any late-bound region was found
+/// and skipped.
pub fn fold_regions<'tcx,T,F>(tcx: &ty::ctxt<'tcx>,
value: &T,
+ skipped_regions: &mut bool,
mut f: F)
-> T
where F : FnMut(ty::Region, u32) -> ty::Region,
T : TypeFoldable<'tcx>,
{
- value.fold_with(&mut RegionFolder::new(tcx, &mut f))
+ value.fold_with(&mut RegionFolder::new(tcx, skipped_regions, &mut f))
}
impl<'a, 'tcx> TypeFolder<'tcx> for RegionFolder<'a, 'tcx>
ty::ReLateBound(debruijn, _) if debruijn.depth < self.current_depth => {
debug!("RegionFolder.fold_region({:?}) skipped bound region (current depth={})",
r, self.current_depth);
+ *self.skipped_regions = true;
r
}
_ => {
debug!("shift_regions(value={:?}, amount={})",
value, amount);
- value.fold_with(&mut RegionFolder::new(tcx, &mut |region, _current_depth| {
+ value.fold_with(&mut RegionFolder::new(tcx, &mut false, &mut |region, _current_depth| {
shift_region(region, amount)
}))
}
// except according to those terms.
//! An iterator over the type substructure.
+//! WARNING: this does not keep track of the region depth.
use middle::ty::{self, Ty};
use std::iter::Iterator;
const NANOS_PER_SEC: f64 = 1_000_000_000.0;
let secs = dur.secs() as f64;
let secs = secs + dur.extra_nanos() as f64 / NANOS_PER_SEC;
- println!("{}time: {:.3} \t{}", repeat(" ").take(old).collect::<String>(),
- secs, what);
+
+ let mem_string = match get_resident() {
+ Some(n) => {
+ let mb = n as f64 / 1_000_000.0;
+ format!("; rss: {}MB", mb.round() as usize)
+ }
+ None => "".to_owned(),
+ };
+ println!("{}time: {:.3}{}\t{}", repeat(" ").take(old).collect::<String>(),
+ secs, mem_string, what);
DEPTH.with(|slot| slot.set(old));
rv
}
+// Memory reporting
+fn get_resident() -> Option<usize> {
+ if cfg!(unix) {
+ get_proc_self_statm_field(1)
+ } else {
+ None
+ }
+}
+
+// Like std::macros::try!, but for Option<>.
+macro_rules! option_try(
+ ($e:expr) => (match $e { Some(e) => e, None => return None })
+);
+
+fn get_proc_self_statm_field(field: usize) -> Option<usize> {
+ use std::fs::File;
+ use std::io::Read;
+
+ assert!(cfg!(unix));
+
+ let mut f = option_try!(File::open("/proc/self/statm").ok());
+ let mut contents = String::new();
+ option_try!(f.read_to_string(&mut contents).ok());
+ let s = option_try!(contents.split_whitespace().nth(field));
+ let npages = option_try!(s.parse::<usize>().ok());
+ Some(npages * ::std::env::page_size())
+}
+
pub fn indent<R, F>(op: F) -> R where
R: Debug,
F: FnOnce() -> R,
TyError => write!(f, "[type error]"),
TyParam(ref param_ty) => write!(f, "{}", param_ty),
TyEnum(did, substs) | TyStruct(did, substs) => {
- parameterized(f, substs, did, &[],
- |tcx| tcx.lookup_item_type(did).generics)
+ ty::tls::with(|tcx| {
+ if did.krate == ast::LOCAL_CRATE &&
+ !tcx.tcache.borrow().contains_key(&did) {
+ write!(f, "{}<..>", tcx.item_path_str(did))
+ } else {
+ parameterized(f, substs, did, &[],
+ |tcx| tcx.lookup_item_type(did).generics)
+ }
+ })
}
TyTrait(ref data) => write!(f, "{}", data),
ty::TyProjection(ref data) => write!(f, "{}", data),
-a:0:64-n32".to_string()
}
- abi::OsFreebsd | abi::OsDragonfly | abi::OsBitrig | abi::OsOpenbsd => {
+ abi::OsFreebsd | abi::OsDragonfly | abi::OsBitrig | abi::OsOpenbsd | abi::OsNetbsd => {
"e-p:32:32:32\
-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64\
-f32:32:32-f64:64:64\
-a:0:64-n32".to_string()
}
- abi::OsFreebsd | abi::OsDragonfly | abi::OsBitrig | abi::OsOpenbsd => {
+ abi::OsBitrig | abi::OsDragonfly | abi::OsFreebsd | abi::OsNetbsd | abi::OsOpenbsd => {
"E-p:32:32:32\
-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64\
-f32:32:32-f64:64:64\
-a:0:64-n32".to_string()
}
- abi::OsFreebsd | abi::OsDragonfly | abi::OsBitrig | abi::OsOpenbsd => {
+ abi::OsFreebsd | abi::OsDragonfly | abi::OsBitrig | abi::OsOpenbsd | abi::OsNetbsd => {
"e-p:32:32:32\
-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64\
-f32:32:32-f64:64:64\
mod freebsd_base;
mod linux_base;
mod openbsd_base;
+mod netbsd_base;
mod windows_base;
mod windows_msvc_base;
x86_64_unknown_bitrig,
x86_64_unknown_openbsd,
+ x86_64_unknown_netbsd,
x86_64_apple_darwin,
i686_apple_darwin,
--- /dev/null
+// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use target::TargetOptions;
+use std::default::Default;
+
+pub fn opts() -> TargetOptions {
+ TargetOptions {
+ linker: "cc".to_string(),
+ dynamic_linking: true,
+ executables: true,
+ morestack: false,
+ linker_is_gnu: true,
+ has_rpath: true,
+ pre_link_args: vec!(
+ // GNU-style linkers will use this to omit linking to libraries
+ // which don't actually fulfill any relocations, but only for
+ // libraries which follow this flag. Thus, use it before
+ // specifying libraries to link to.
+ "-Wl,--as-needed".to_string(),
+ ),
+ position_independent_executables: true,
+ .. Default::default()
+ }
+}
--- /dev/null
+// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use target::Target;
+
+pub fn target() -> Target {
+ let mut base = super::netbsd_base::opts();
+ base.pre_link_args.push("-m64".to_string());
+
+ Target {
+ data_layout: "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-\
+ f32:32:32-f64:64:64-v64:64:64-v128:128:128-a:0:64-\
+ s0:64:64-f80:128:128-n8:16:32:64-S128".to_string(),
+ llvm_target: "x86_64-unknown-netbsd".to_string(),
+ target_endian: "little".to_string(),
+ target_pointer_width: "64".to_string(),
+ arch: "x86_64".to_string(),
+ target_os: "netbsd".to_string(),
+ target_env: "".to_string(),
+ options: base,
+ }
+}
"e-p:32:32-f64:32:64-i64:32:64-f80:32:32-n8:16:32".to_string()
}
- abi::OsFreebsd | abi::OsDragonfly | abi::OsBitrig | abi::OsOpenbsd => {
+ abi::OsFreebsd | abi::OsDragonfly | abi::OsBitrig | abi::OsOpenbsd | abi::OsNetbsd => {
"e-p:32:32-f64:32:64-i64:32:64-f80:32:32-n8:16:32".to_string()
}
s0:64:64-f80:128:128-n8:16:32:64-S128".to_string()
}
- abi::OsFreebsd | abi::OsDragonfly | abi::OsBitrig | abi::OsOpenbsd => {
+ abi::OsBitrig | abi::OsDragonfly | abi::OsFreebsd | abi::OsNetbsd | abi::OsOpenbsd => {
"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-\
f32:32:32-f64:64:64-v64:64:64-v128:128:128-a:0:64-\
s0:64:64-f80:128:128-n8:16:32:64-S128".to_string()
use borrowck::*;
use borrowck::InteriorKind::{InteriorElement, InteriorField};
use rustc::middle::expr_use_visitor as euv;
+use rustc::middle::infer;
use rustc::middle::mem_categorization as mc;
use rustc::middle::region;
use rustc::middle::ty;
debug!("check_loans(body id={})", body.id);
let param_env = ty::ParameterEnvironment::for_item(bccx.tcx, fn_id);
+ let infcx = infer::new_infer_ctxt(bccx.tcx, &bccx.tcx.tables, Some(param_env), false);
let mut clcx = CheckLoanCtxt {
bccx: bccx,
dfcx_loans: dfcx_loans,
move_data: move_data,
all_loans: all_loans,
- param_env: ¶m_env,
+ param_env: &infcx.parameter_environment
};
{
- let mut euv = euv::ExprUseVisitor::new(&mut clcx, ¶m_env);
+ let mut euv = euv::ExprUseVisitor::new(&mut clcx, &infcx);
euv.walk_fn(decl, body);
}
}
use borrowck::*;
use borrowck::move_data::MoveData;
use rustc::middle::expr_use_visitor as euv;
+use rustc::middle::infer;
use rustc::middle::mem_categorization as mc;
use rustc::middle::region;
use rustc::middle::ty;
};
let param_env = ty::ParameterEnvironment::for_item(bccx.tcx, fn_id);
-
+ let infcx = infer::new_infer_ctxt(bccx.tcx, &bccx.tcx.tables, Some(param_env), false);
{
- let mut euv = euv::ExprUseVisitor::new(&mut glcx, ¶m_env);
+ let mut euv = euv::ExprUseVisitor::new(&mut glcx, &infcx);
euv.walk_fn(decl, body);
}
impl<'a, 'tcx, 'v> Visitor<'v> for StaticInitializerCtxt<'a, 'tcx> {
fn visit_expr(&mut self, ex: &Expr) {
if let ast::ExprAddrOf(mutbl, ref base) = ex.node {
- let param_env = self.bccx.tcx.empty_parameter_environment();
- let mc = mc::MemCategorizationContext::new(¶m_env);
+ let infcx = infer::new_infer_ctxt(self.bccx.tcx, &self.bccx.tcx.tables, None, false);
+ let mc = mc::MemCategorizationContext::new(&infcx);
let base_cmt = mc.cat_expr(&**base).unwrap();
let borrow_kind = ty::BorrowKind::from_mutbl(mutbl);
// Check that we don't allow borrows of unsafe static items.
use rustc::middle::expr_use_visitor as euv;
use rustc::middle::free_region::FreeRegionMap;
use rustc::middle::mem_categorization as mc;
-use rustc::middle::mem_categorization::Typer;
use rustc::middle::region;
use rustc::middle::ty::{self, Ty};
-> (&'static str, &'static str) {
match ty.sty {
_ => {
- if param_env.type_moves_by_default(ty, span) {
+ if ty.moves_by_default(param_env, span) {
("non-copyable",
"perhaps you meant to use `clone()`?")
} else {
lang_items,
stability::Index::new(krate),
|tcx| {
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None, false);
body(Env { infcx: &infcx });
let free_regions = FreeRegionMap::new();
infcx.resolve_regions_and_report_errors(&free_regions, ast::CRATE_NODE_ID);
//! Use the former for unit-like structs and the latter for structs with
//! a `pub fn new()`.
+// BitSet
+#![allow(deprecated)]
+
use metadata::{csearch, decoder};
use middle::def::*;
-use middle::mem_categorization::Typer;
use middle::subst::Substs;
use middle::ty::{self, Ty};
use middle::{def, pat_util, stability};
}
fn check_item(&mut self, cx: &Context, it: &ast::Item) {
- let has_extern_repr = it.attrs.iter().any(|attr| {
+ let extern_repr_count = it.attrs.iter().filter(|attr| {
attr::find_repr_attrs(cx.tcx.sess.diagnostic(), attr).iter()
.any(|r| r == &attr::ReprExtern)
- });
+ }).count();
+ let has_extern_repr = extern_repr_count > 0;
+
if has_extern_repr {
return;
}
_ => return,
};
let parameter_environment = cx.tcx.empty_parameter_environment();
- if !parameter_environment.type_moves_by_default(ty, item.span) {
+ // FIXME (@jroesch) should probably inver this so that the parameter env still impls this
+ // method
+ if !ty.moves_by_default(¶meter_environment, item.span) {
return;
}
if parameter_environment.can_type_implement_copy(ty, item.span).is_ok() {
fn_id: ast::NodeId,
_: ast::Ident,
id: ast::NodeId) -> bool {
- tcx.def_map.borrow().get(&id)
- .map_or(false, |def| def.def_id() == local_def(fn_id))
+ match tcx.map.get(id) {
+ ast_map::NodeExpr(&ast::Expr { node: ast::ExprCall(ref callee, _), .. }) => {
+ tcx.def_map.borrow().get(&callee.id)
+ .map_or(false, |def| def.def_id() == local_def(fn_id))
+ }
+ _ => false
+ }
}
// check if the method call `id` refers to method `method_id`
// method instead.
ty::MethodTypeParam(
ty::MethodParam { ref trait_ref, method_num, impl_def_id: None, }) => {
+
+ let on_self = m.substs.self_ty().map_or(false, |t| t.is_self());
+ if !on_self {
+ // we can only be recurring in a default
+ // method if we're being called literally
+ // on the `Self` type.
+ return false
+ }
+
tcx.trait_item(trait_ref.def_id, method_num).def_id()
}
#![feature(unicode)]
#![feature(unicode)]
#![feature(vec_push_all)]
-#![feature(cell_extras)]
#![allow(trivial_casts)]
fn process_pat(&mut self, p:&ast::Pat) {
if generated_code(p.span) {
- return
+ return;
}
match p.node {
if let Some(struct_def) = struct_def {
let struct_fields = self.tcx.lookup_struct_fields(struct_def);
for &Spanned { node: ref field, span } in fields {
+ if generated_code(span) {
+ continue;
+ }
+
let sub_span = self.span.span_for_first_ident(span);
for f in &struct_fields {
if f.name == field.ident.name {
break;
}
}
- self.visit_pat(&*field.pat);
+ self.visit_pat(&field.pat);
}
}
}
qualname: qualname,
declaration: None,
span: sub_span.unwrap(),
- scope: self.tcx.map.get_parent(item.id),
+ scope: self.tcx.map.get_enclosing_scope(item.id).unwrap_or(0),
})
}
ast::ItemStatic(ref typ, mt, ref expr) => {
name: get_ident(item.ident).to_string(),
qualname: qualname,
span: sub_span.unwrap(),
- scope: self.tcx.map.get_parent(item.id),
+ scope: self.tcx.map.get_enclosing_scope(item.id).unwrap_or(0),
value: value,
type_value: ty_to_string(&typ),
})
name: get_ident(item.ident).to_string(),
qualname: qualname,
span: sub_span.unwrap(),
- scope: self.tcx.map.get_parent(item.id),
+ scope: self.tcx.map.get_enclosing_scope(item.id).unwrap_or(0),
value: self.span_utils.snippet(expr.span),
type_value: ty_to_string(&typ),
})
name: get_ident(item.ident).to_string(),
qualname: qualname,
span: sub_span.unwrap(),
- scope: self.tcx.map.get_parent(item.id),
+ scope: self.tcx.map.get_enclosing_scope(item.id).unwrap_or(0),
filename: filename,
})
},
value: val,
span: sub_span.unwrap(),
qualname: enum_name,
- scope: self.tcx.map.get_parent(item.id),
+ scope: self.tcx.map.get_enclosing_scope(item.id).unwrap_or(0),
})
},
ast::ItemImpl(_, _, _, ref trait_ref, ref typ, _) => {
let mut type_data = None;
let sub_span;
- let parent = self.tcx.map.get_parent(item.id);
+ let parent = self.tcx.map.get_enclosing_scope(item.id).unwrap_or(0);
match typ.node {
// Common case impl for a struct or something basic.
return Some(Data::VariableRefData(VariableRefData {
name: get_ident(ident.node).to_string(),
span: sub_span.unwrap(),
- scope: self.tcx.map.get_parent(expr.id),
+ scope: self.tcx.map.get_enclosing_scope(expr.id).unwrap_or(0),
ref_id: f.id,
}));
}
let sub_span = self.span_utils.span_for_last_ident(path.span);
Some(Data::TypeRefData(TypeRefData {
span: sub_span.unwrap(),
- scope: self.tcx.map.get_parent(expr.id),
+ scope: self.tcx.map.get_enclosing_scope(expr.id).unwrap_or(0),
ref_id: def_id,
}))
}
use middle::const_eval;
use middle::def::{self, DefMap};
use middle::expr_use_visitor as euv;
+use middle::infer;
use middle::lang_items::StrEqFnLangItem;
use middle::mem_categorization as mc;
-use middle::mem_categorization::Typer;
use middle::pat_util::*;
use trans::adt;
use trans::base::*;
use trans::tvec;
use trans::type_of;
use middle::ty::{self, Ty};
-use session::config::{NoDebugInfo, FullDebugInfo};
+use session::config::NoDebugInfo;
use util::common::indenter;
use util::nodemap::FnvHashMap;
use util::ppaux;
reassigned: false
};
{
- let mut visitor = euv::ExprUseVisitor::new(&mut rc, bcx);
+ let infcx = infer::new_infer_ctxt(bcx.tcx(), &bcx.tcx().tables, None, false);
+ let mut visitor = euv::ExprUseVisitor::new(&mut rc, &infcx);
visitor.walk_expr(body);
}
rc.reassigned
let trmode;
match bm {
ast::BindByValue(_)
- if !param_env.type_moves_by_default(variable_ty, span) || reassigned =>
+ if !variable_ty.moves_by_default(¶m_env, span) || reassigned =>
{
llmatch = alloca_no_lifetime(bcx,
llvariable_ty.ptr_to(),
}
}
-/// Generates code for argument patterns like `fn foo(<pat>: T)`.
-/// Creates entries in the `lllocals` map for each of the bindings
-/// in `pat`.
-///
-/// # Arguments
-///
-/// - `pat` is the argument pattern
-/// - `llval` is a pointer to the argument value (in other words,
-/// if the argument type is `T`, then `llval` is a `T*`). In some
-/// cases, this code may zero out the memory `llval` points at.
-pub fn store_arg<'blk, 'tcx>(mut bcx: Block<'blk, 'tcx>,
- pat: &ast::Pat,
- arg: Datum<'tcx, Rvalue>,
- arg_scope: cleanup::ScopeId)
- -> Block<'blk, 'tcx> {
- let _icx = push_ctxt("match::store_arg");
-
- match simple_identifier(&*pat) {
- Some(ident) => {
- // Generate nicer LLVM for the common case of fn a pattern
- // like `x: T`
- let arg_ty = node_id_type(bcx, pat.id);
- if type_of::arg_is_indirect(bcx.ccx(), arg_ty)
- && bcx.sess().opts.debuginfo != FullDebugInfo {
- // Don't copy an indirect argument to an alloca, the caller
- // already put it in a temporary alloca and gave it up, unless
- // we emit extra-debug-info, which requires local allocas :(.
- let arg_val = arg.add_clean(bcx.fcx, arg_scope);
- bcx.fcx.lllocals.borrow_mut()
- .insert(pat.id, Datum::new(arg_val, arg_ty, Lvalue));
- bcx
- } else {
- mk_binding_alloca(
- bcx, pat.id, ident.name, arg_scope, arg,
- |arg, bcx, llval, _| arg.store_to(bcx, llval))
- }
- }
-
- None => {
- // General path. Copy out the values that are used in the
- // pattern.
- let arg = unpack_datum!(
- bcx, arg.to_lvalue_datum_in_scope(bcx, "__arg", arg_scope));
- bind_irrefutable_pat(bcx, pat, arg.val, arg_scope)
- }
- }
-}
-
fn mk_binding_alloca<'blk, 'tcx, A, F>(bcx: Block<'blk, 'tcx>,
p_id: ast::NodeId,
name: ast::Name,
/// - bcx: starting basic block context
/// - pat: the irrefutable pattern being matched.
/// - val: the value being matched -- must be an lvalue (by ref, with cleanup)
-fn bind_irrefutable_pat<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
+pub fn bind_irrefutable_pat<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
pat: &ast::Pat,
val: ValueRef,
cleanup_scope: cleanup::ScopeId)
use llvm::{ValueRef, True, IntEQ, IntNE};
use back::abi::FAT_PTR_ADDR;
use middle::subst;
-use middle::ty::{self, Ty, ClosureTyper};
+use middle::infer;
+use middle::ty::{self, Ty};
use middle::ty::Disr;
use syntax::ast;
use syntax::attr;
Univariant(mk_struct(cx, &ftys[..], packed, t), dtor_to_init_u8(dtor))
}
ty::TyClosure(def_id, substs) => {
- let typer = NormalizingClosureTyper::new(cx.tcx());
- let upvars = typer.closure_upvars(def_id, substs).unwrap();
+ let infcx = infer::normalizing_infer_ctxt(cx.tcx(), &cx.tcx().tables);
+ let upvars = infcx.closure_upvars(def_id, substs).unwrap();
let upvar_types = upvars.iter().map(|u| u.ty).collect::<Vec<_>>();
Univariant(mk_struct(cx, &upvar_types[..], false, t), 0)
}
// Perhaps one of the upvars of this struct is non-zero
// Let's recurse and find out!
ty::TyClosure(def_id, substs) => {
- let typer = NormalizingClosureTyper::new(tcx);
- let upvars = typer.closure_upvars(def_id, substs).unwrap();
+ let infcx = infer::normalizing_infer_ctxt(tcx, &tcx.tables);
+ let upvars = infcx.closure_upvars(def_id, substs).unwrap();
let upvar_types = upvars.iter().map(|u| u.ty).collect::<Vec<_>>();
for (j, &ty) in upvar_types.iter().enumerate() {
use libc::{c_uint, c_ulonglong};
use llvm::{self, ValueRef, AttrHelper};
-use middle::ty::{self, ClosureTyper};
+use middle::ty;
+use middle::infer;
use session::config::NoDebugInfo;
use syntax::abi;
use syntax::ast;
let (fn_sig, abi, env_ty) = match fn_type.sty {
ty::TyBareFn(_, ref f) => (&f.sig, f.abi, None),
ty::TyClosure(closure_did, substs) => {
- let typer = common::NormalizingClosureTyper::new(ccx.tcx());
- function_type = typer.closure_type(closure_did, substs);
+ let infcx = infer::normalizing_infer_ctxt(ccx.tcx(), &ccx.tcx().tables);
+ function_type = infcx.closure_type(closure_did, substs);
let self_type = base::self_type_for_closure(ccx, closure_did, fn_type);
(&function_type.sig, abi::RustCall, Some(self_type))
}
use metadata::{csearch, encoder, loader};
use middle::astencode;
use middle::cfg;
+use middle::infer;
use middle::lang_items::{LangItem, ExchangeMallocFnLangItem, StartFnLangItem};
use middle::weak_lang_items;
+use middle::pat_util::simple_identifier;
use middle::subst::Substs;
-use middle::ty::{self, Ty, ClosureTyper, HasTypeFlags};
+use middle::ty::{self, Ty, HasTypeFlags};
use rustc::ast_map;
-use session::config::{self, NoDebugInfo};
+use session::config::{self, NoDebugInfo, FullDebugInfo};
use session::Session;
use trans::_match;
use trans::adt;
}
ty::TyClosure(def_id, substs) => {
let repr = adt::represent_type(cx.ccx(), t);
- let typer = common::NormalizingClosureTyper::new(cx.tcx());
- let upvars = typer.closure_upvars(def_id, substs).unwrap();
+ let infcx = infer::normalizing_infer_ctxt(cx.tcx(), &cx.tcx().tables);
+ let upvars = infcx.closure_upvars(def_id, substs).unwrap();
for (i, upvar) in upvars.iter().enumerate() {
let llupvar = adt::trans_field_ptr(cx, &*repr, data_ptr, 0, i);
cx = f(cx, llupvar, upvar.ty);
Alloca(cx, ty, name)
}
+pub fn set_value_name(val: ValueRef, name: &str) {
+ unsafe {
+ let name = CString::new(name).unwrap();
+ llvm::LLVMSetValueName(val, name.as_ptr());
+ }
+}
+
// Creates the alloca slot which holds the pointer to the slot for the final return value
pub fn make_return_slot_pointer<'a, 'tcx>(fcx: &FunctionContext<'a, 'tcx>,
output_type: Ty<'tcx>) -> ValueRef {
}
}
-// work around bizarre resolve errors
-pub type RvalueDatum<'tcx> = datum::Datum<'tcx, datum::Rvalue>;
-
-// create_datums_for_fn_args: creates rvalue datums for each of the
-// incoming function arguments. These will later be stored into
-// appropriate lvalue datums.
-pub fn create_datums_for_fn_args<'a, 'tcx>(bcx: Block<'a, 'tcx>,
- arg_tys: &[Ty<'tcx>])
- -> Vec<RvalueDatum<'tcx>> {
+// create_datums_for_fn_args: creates lvalue datums for each of the
+// incoming function arguments.
+pub fn create_datums_for_fn_args<'a, 'tcx>(mut bcx: Block<'a, 'tcx>,
+ args: &[ast::Arg],
+ arg_tys: &[Ty<'tcx>],
+ has_tupled_arg: bool,
+ arg_scope: cleanup::CustomScopeIndex)
+ -> Block<'a, 'tcx> {
let _icx = push_ctxt("create_datums_for_fn_args");
let fcx = bcx.fcx;
+ let arg_scope_id = cleanup::CustomScope(arg_scope);
// Return an array wrapping the ValueRefs that we get from `get_param` for
// each argument into datums.
- let mut i = fcx.arg_offset() as c_uint;
- arg_tys.iter().map(|&arg_ty| {
- if common::type_is_fat_ptr(bcx.tcx(), arg_ty) {
- let llty = type_of::type_of(bcx.ccx(), arg_ty);
- let data = get_param(fcx.llfn, i);
- let extra = get_param(fcx.llfn, i + 1);
- let fat_ptr = expr::make_fat_ptr(bcx, llty, data, extra);
- i += 2;
- datum::Datum::new(fat_ptr, arg_ty, datum::Rvalue { mode: datum::ByValue })
- } else {
- let llarg = get_param(fcx.llfn, i);
- i += 1;
- datum::Datum::new(llarg, arg_ty, arg_kind(fcx, arg_ty))
- }
- }).collect()
-}
-
-/// Creates rvalue datums for each of the incoming function arguments and
-/// tuples the arguments. These will later be stored into appropriate lvalue
-/// datums.
-///
-/// FIXME(pcwalton): Reduce the amount of code bloat this is responsible for.
-fn create_datums_for_fn_args_under_call_abi<'blk, 'tcx>(
- mut bcx: Block<'blk, 'tcx>,
- arg_scope: cleanup::CustomScopeIndex,
- arg_tys: &[Ty<'tcx>])
- -> Vec<RvalueDatum<'tcx>> {
- let mut result = Vec::new();
- let mut idx = bcx.fcx.arg_offset() as c_uint;
+ //
+ // For certain mode/type combinations, the raw llarg values are passed
+ // by value. However, within the fn body itself, we want to always
+ // have all locals and arguments be by-ref so that we can cancel the
+ // cleanup and for better interaction with LLVM's debug info. So, if
+ // the argument would be passed by value, we store it into an alloca.
+ // This alloca should be optimized away by LLVM's mem-to-reg pass in
+ // the event it's not truly needed.
+ let mut idx = fcx.arg_offset() as c_uint;
for (i, &arg_ty) in arg_tys.iter().enumerate() {
- if i < arg_tys.len() - 1 {
- // Regular argument.
- result.push(if common::type_is_fat_ptr(bcx.tcx(), arg_ty) {
- let llty = type_of::type_of(bcx.ccx(), arg_ty);
- let data = get_param(bcx.fcx.llfn, idx);
- let extra = get_param(bcx.fcx.llfn, idx + 1);
+ let arg_datum = if !has_tupled_arg || i < arg_tys.len() - 1 {
+ if type_of::arg_is_indirect(bcx.ccx(), arg_ty)
+ && bcx.sess().opts.debuginfo != FullDebugInfo {
+ // Don't copy an indirect argument to an alloca, the caller
+ // already put it in a temporary alloca and gave it up, unless
+ // we emit extra-debug-info, which requires local allocas :(.
+ let llarg = get_param(fcx.llfn, idx);
+ idx += 1;
+ bcx.fcx.schedule_lifetime_end(arg_scope_id, llarg);
+ bcx.fcx.schedule_drop_mem(arg_scope_id, llarg, arg_ty);
+
+ datum::Datum::new(llarg, arg_ty, datum::Lvalue)
+ } else if common::type_is_fat_ptr(bcx.tcx(), arg_ty) {
+ let data = get_param(fcx.llfn, idx);
+ let extra = get_param(fcx.llfn, idx + 1);
idx += 2;
- let fat_ptr = expr::make_fat_ptr(bcx, llty, data, extra);
- datum::Datum::new(fat_ptr, arg_ty, datum::Rvalue { mode: datum::ByValue })
+ unpack_datum!(bcx, datum::lvalue_scratch_datum(bcx, arg_ty, "",
+ arg_scope_id, (data, extra),
+ |(data, extra), bcx, dst| {
+ Store(bcx, data, expr::get_dataptr(bcx, dst));
+ Store(bcx, extra, expr::get_len(bcx, dst));
+ bcx
+ }))
} else {
- let val = get_param(bcx.fcx.llfn, idx);
+ let llarg = get_param(fcx.llfn, idx);
idx += 1;
- datum::Datum::new(val, arg_ty, arg_kind(bcx.fcx, arg_ty))
- });
-
- continue
- }
-
- // This is the last argument. Tuple it.
- match arg_ty.sty {
- ty::TyTuple(ref tupled_arg_tys) => {
- let tuple_args_scope_id = cleanup::CustomScope(arg_scope);
- let tuple =
+ let tmp = datum::Datum::new(llarg, arg_ty, arg_kind(fcx, arg_ty));
+ unpack_datum!(bcx, datum::lvalue_scratch_datum(bcx, arg_ty, "",
+ arg_scope_id, tmp,
+ |tmp, bcx, dst| tmp.store_to(bcx, dst)))
+ }
+ } else {
+ // FIXME(pcwalton): Reduce the amount of code bloat this is responsible for.
+ match arg_ty.sty {
+ ty::TyTuple(ref tupled_arg_tys) => {
unpack_datum!(bcx,
datum::lvalue_scratch_datum(bcx,
arg_ty,
"tupled_args",
- tuple_args_scope_id,
+ arg_scope_id,
(),
|(),
mut bcx,
};
}
bcx
- }));
- let tuple = unpack_datum!(bcx,
- tuple.to_expr_datum()
- .to_rvalue_datum(bcx,
- "argtuple"));
- result.push(tuple);
- }
- _ => {
- bcx.tcx().sess.bug("last argument of a function with \
- `rust-call` ABI isn't a tuple?!")
+ }))
+ }
+ _ => {
+ bcx.tcx().sess.bug("last argument of a function with \
+ `rust-call` ABI isn't a tuple?!")
+ }
}
};
- }
-
- result
-}
-
-fn copy_args_to_allocas<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
- arg_scope: cleanup::CustomScopeIndex,
- args: &[ast::Arg],
- arg_datums: Vec<RvalueDatum<'tcx>>)
- -> Block<'blk, 'tcx> {
- debug!("copy_args_to_allocas");
-
- let _icx = push_ctxt("copy_args_to_allocas");
- let mut bcx = bcx;
-
- let arg_scope_id = cleanup::CustomScope(arg_scope);
-
- for (i, arg_datum) in arg_datums.into_iter().enumerate() {
- // For certain mode/type combinations, the raw llarg values are passed
- // by value. However, within the fn body itself, we want to always
- // have all locals and arguments be by-ref so that we can cancel the
- // cleanup and for better interaction with LLVM's debug info. So, if
- // the argument would be passed by value, we store it into an alloca.
- // This alloca should be optimized away by LLVM's mem-to-reg pass in
- // the event it's not truly needed.
-
- bcx = _match::store_arg(bcx, &*args[i].pat, arg_datum, arg_scope_id);
+ let pat = &*args[i].pat;
+ bcx = if let Some(ident) = simple_identifier(&*pat) {
+ // Generate nicer LLVM for the common case of fn a pattern
+ // like `x: T`
+ set_value_name(arg_datum.val, &bcx.name(ident.name));
+ bcx.fcx.lllocals.borrow_mut().insert(pat.id, arg_datum);
+ bcx
+ } else {
+ // General path. Copy out the values that are used in the
+ // pattern.
+ _match::bind_irrefutable_pat(bcx, pat, arg_datum.val, arg_scope_id)
+ };
debuginfo::create_argument_metadata(bcx, &args[i]);
}
decl.inputs.iter()
.map(|arg| node_id_type(bcx, arg.id))
.collect::<Vec<_>>();
- let monomorphized_arg_types = match closure_env {
- closure::ClosureEnv::NotClosure => {
- monomorphized_arg_types
- }
-
- // Tuple up closure argument types for the "rust-call" ABI.
- closure::ClosureEnv::Closure(_) => {
- vec![ccx.tcx().mk_tup(monomorphized_arg_types)]
- }
- };
for monomorphized_arg_type in &monomorphized_arg_types {
debug!("trans_closure: monomorphized_arg_type: {:?}",
monomorphized_arg_type);
debug!("trans_closure: function lltype: {}",
bcx.fcx.ccx.tn().val_to_string(bcx.fcx.llfn));
- let arg_datums = match closure_env {
- closure::ClosureEnv::NotClosure if abi == RustCall => {
- create_datums_for_fn_args_under_call_abi(bcx, arg_scope, &monomorphized_arg_types[..])
- }
- _ => {
- let arg_tys = untuple_arguments_if_necessary(ccx, &monomorphized_arg_types, abi);
- create_datums_for_fn_args(bcx, &arg_tys)
- }
+ let has_tupled_arg = match closure_env {
+ closure::ClosureEnv::NotClosure => abi == RustCall,
+ _ => false
};
- bcx = copy_args_to_allocas(bcx, arg_scope, &decl.inputs, arg_datums);
+ bcx = create_datums_for_fn_args(bcx, &decl.inputs, &monomorphized_arg_types,
+ has_tupled_arg, arg_scope);
bcx = closure_env.load(bcx, cleanup::CustomScope(arg_scope));
let arg_tys = ccx.tcx().erase_late_bound_regions(&ctor_ty.fn_args());
- let arg_datums = create_datums_for_fn_args(bcx, &arg_tys[..]);
-
if !type_is_zero_size(fcx.ccx, result_ty.unwrap()) {
let dest = fcx.get_ret_slot(bcx, result_ty, "eret_slot");
let repr = adt::represent_type(ccx, result_ty.unwrap());
- for (i, arg_datum) in arg_datums.into_iter().enumerate() {
+ let mut llarg_idx = fcx.arg_offset() as c_uint;
+ for (i, arg_ty) in arg_tys.into_iter().enumerate() {
let lldestptr = adt::trans_field_ptr(bcx,
&*repr,
dest,
disr,
i);
- arg_datum.store_to(bcx, lldestptr);
+ if common::type_is_fat_ptr(bcx.tcx(), arg_ty) {
+ Store(bcx, get_param(fcx.llfn, llarg_idx), expr::get_dataptr(bcx, lldestptr));
+ Store(bcx, get_param(fcx.llfn, llarg_idx + 1), expr::get_len(bcx, lldestptr));
+ llarg_idx += 2;
+ } else {
+ let arg = get_param(fcx.llfn, llarg_idx);
+ llarg_idx += 1;
+
+ if arg_is_indirect(ccx, arg_ty) {
+ memcpy_ty(bcx, lldestptr, arg, arg_ty);
+ } else {
+ store_ty(bcx, arg, lldestptr, arg_ty);
+ }
+ }
}
adt::trans_set_discr(bcx, &*repr, dest, disr);
}
pub trait Cleanup<'tcx> {
fn must_unwind(&self) -> bool;
- fn clean_on_unwind(&self) -> bool;
fn is_lifetime_end(&self) -> bool;
fn trans<'blk>(&self,
bcx: Block<'blk, 'tcx>,
if !self.type_needs_drop(ty) { return; }
let drop = box DropValue {
is_immediate: false,
- must_unwind: common::type_needs_unwind_cleanup(self.ccx, ty),
val: val,
ty: ty,
fill_on_drop: false,
let drop = box DropValue {
is_immediate: false,
- must_unwind: common::type_needs_unwind_cleanup(self.ccx, ty),
val: val,
ty: ty,
fill_on_drop: true,
let drop = box DropValue {
is_immediate: false,
- must_unwind: common::type_needs_unwind_cleanup(self.ccx, ty),
val: val,
ty: ty,
fill_on_drop: false,
if !self.type_needs_drop(ty) { return; }
let drop = box DropValue {
is_immediate: true,
- must_unwind: common::type_needs_unwind_cleanup(self.ccx, ty),
val: val,
ty: ty,
fill_on_drop: false,
//
// At this point, `popped_scopes` is empty, and so the final block
// that we return to the user is `Cleanup(AST 24)`.
- while !popped_scopes.is_empty() {
- let mut scope = popped_scopes.pop().unwrap();
-
- if scope.cleanups.iter().any(|c| cleanup_is_suitable_for(&**c, label))
- {
- let name = scope.block_name("clean");
- debug!("generating cleanups for {}", name);
- let bcx_in = self.new_block(label.is_unwind(),
- &name[..],
- None);
- let mut bcx_out = bcx_in;
- for cleanup in scope.cleanups.iter().rev() {
- if cleanup_is_suitable_for(&**cleanup, label) {
- bcx_out = cleanup.trans(bcx_out,
- scope.debug_loc);
- }
- }
- build::Br(bcx_out, prev_llbb, DebugLoc::None);
- prev_llbb = bcx_in.llbb;
- } else {
- debug!("no suitable cleanups in {}",
- scope.block_name("clean"));
+ while let Some(mut scope) = popped_scopes.pop() {
+ let name = scope.block_name("clean");
+ debug!("generating cleanups for {}", name);
+ let bcx_in = self.new_block(label.is_unwind(),
+ &name[..],
+ None);
+ let mut bcx_out = bcx_in;
+ for cleanup in scope.cleanups.iter().rev() {
+ bcx_out = cleanup.trans(bcx_out,
+ scope.debug_loc);
}
+ build::Br(bcx_out, prev_llbb, DebugLoc::None);
+ prev_llbb = bcx_in.llbb;
scope.add_cached_early_exit(label, prev_llbb);
self.push_scope(scope);
#[derive(Copy, Clone)]
pub struct DropValue<'tcx> {
is_immediate: bool,
- must_unwind: bool,
val: ValueRef,
ty: Ty<'tcx>,
fill_on_drop: bool,
impl<'tcx> Cleanup<'tcx> for DropValue<'tcx> {
fn must_unwind(&self) -> bool {
- self.must_unwind
- }
-
- fn clean_on_unwind(&self) -> bool {
- self.must_unwind
+ true
}
fn is_lifetime_end(&self) -> bool {
true
}
- fn clean_on_unwind(&self) -> bool {
- true
- }
-
fn is_lifetime_end(&self) -> bool {
false
}
false
}
- fn clean_on_unwind(&self) -> bool {
- true
- }
-
fn is_lifetime_end(&self) -> bool {
true
}
r
}
-fn cleanup_is_suitable_for(c: &Cleanup,
- label: EarlyExitLabel) -> bool {
- !label.is_unwind() || c.clean_on_unwind()
-}
-
///////////////////////////////////////////////////////////////////////////
// These traits just exist to put the methods into this file.
use arena::TypedArena;
use back::link::{self, mangle_internal_name_by_path_and_seq};
use llvm::{ValueRef, get_params};
-use middle::mem_categorization::Typer;
+use middle::infer;
use trans::adt;
use trans::attributes;
use trans::base::*;
use trans::expr;
use trans::monomorphize::{self, MonoId};
use trans::type_of::*;
-use middle::ty::{self, ClosureTyper};
+use middle::ty;
use middle::subst::Substs;
use session::config::FullDebugInfo;
// takes the same set of type arguments as the enclosing fn, and
// this function (`trans_closure`) is invoked at the point
// of the closure expression.
- let typer = NormalizingClosureTyper::new(tcx);
- let function_type = typer.closure_type(closure_id, param_substs);
+
+ let infcx = infer::normalizing_infer_ctxt(ccx.tcx(), &ccx.tcx().tables);
+ let function_type = infcx.closure_type(closure_id, param_substs);
let freevars: Vec<ty::Freevar> =
tcx.with_freevars(id, |fv| fv.iter().cloned().collect());
ccx.tn().val_to_string(llreffn));
let tcx = ccx.tcx();
- let typer = NormalizingClosureTyper::new(tcx);
+ let infcx = infer::normalizing_infer_ctxt(ccx.tcx(), &ccx.tcx().tables);
// Find a version of the closure type. Substitute static for the
// region since it doesn't really matter.
let ref_closure_ty = tcx.mk_imm_ref(tcx.mk_region(ty::ReStatic), closure_ty);
// Make a version with the type of by-ref closure.
- let ty::ClosureTy { unsafety, abi, mut sig } = typer.closure_type(closure_def_id, substs);
+ let ty::ClosureTy { unsafety, abi, mut sig } = infcx.closure_type(closure_def_id, substs);
sig.0.inputs.insert(0, ref_closure_ty); // sig has no self type as of yet
let llref_bare_fn_ty = tcx.mk_bare_fn(ty::BareFnTy { unsafety: unsafety,
abi: abi,
use middle::def;
use middle::infer;
use middle::lang_items::LangItem;
-use middle::mem_categorization as mc;
-use middle::mem_categorization::Typer;
-use middle::region;
-use middle::subst::{self, Subst, Substs};
+use middle::subst::{self, Substs};
use trans::base;
use trans::build;
use trans::cleanup;
use arena::TypedArena;
use libc::{c_uint, c_char};
use std::ffi::CString;
-use std::cell::{Cell, RefCell, Ref};
+use std::cell::{Cell, RefCell};
use std::result::Result as StdResult;
use std::vec::Vec;
use syntax::ast;
use syntax::codemap::{DUMMY_SP, Span};
use syntax::parse::token::InternedString;
use syntax::parse::token;
-use util::common::memoized;
-use util::nodemap::FnvHashSet;
pub use trans::context::CrateContext;
}
}
-// Some things don't need cleanups during unwinding because the
-// thread can free them all at once later. Currently only things
-// that only contain scalars and shared boxes can avoid unwind
-// cleanups.
-pub fn type_needs_unwind_cleanup<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>, ty: Ty<'tcx>) -> bool {
- return memoized(ccx.needs_unwind_cleanup_cache(), ty, |ty| {
- type_needs_unwind_cleanup_(ccx.tcx(), ty, &mut FnvHashSet())
- });
-
- fn type_needs_unwind_cleanup_<'tcx>(tcx: &ty::ctxt<'tcx>,
- ty: Ty<'tcx>,
- tycache: &mut FnvHashSet<Ty<'tcx>>)
- -> bool
- {
- // Prevent infinite recursion
- if !tycache.insert(ty) {
- return false;
- }
-
- let mut needs_unwind_cleanup = false;
- ty.maybe_walk(|ty| {
- needs_unwind_cleanup |= match ty.sty {
- ty::TyBool | ty::TyInt(_) | ty::TyUint(_) |
- ty::TyFloat(_) | ty::TyTuple(_) | ty::TyRawPtr(_) => false,
-
- ty::TyEnum(did, substs) =>
- tcx.enum_variants(did).iter().any(|v|
- v.args.iter().any(|&aty| {
- let t = aty.subst(tcx, substs);
- type_needs_unwind_cleanup_(tcx, t, tycache)
- })
- ),
-
- _ => true
- };
- !needs_unwind_cleanup
- });
- needs_unwind_cleanup
- }
-}
-
/// If `type_needs_drop` returns true, then `ty` is definitely
/// non-copy and *might* have a destructor attached; if it returns
/// false, then `ty` definitely has no destructor (i.e. no drop glue).
// normalized version of the type, and therefore will definitely
// know whether the type implements Copy (and thus needs no
// cleanup/drop/zeroing) ...
- let implements_copy = !param_env.type_moves_by_default(ty, DUMMY_SP);
+ let implements_copy = !ty.moves_by_default(param_env, DUMMY_SP);
if implements_copy { return false; }
}
}
-impl<'blk, 'tcx> mc::Typer<'tcx> for BlockS<'blk, 'tcx> {
- fn node_ty(&self, id: ast::NodeId) -> mc::McResult<Ty<'tcx>> {
- Ok(node_id_type(self, id))
- }
-
- fn expr_ty_adjusted(&self, expr: &ast::Expr) -> mc::McResult<Ty<'tcx>> {
- Ok(expr_ty_adjusted(self, expr))
- }
-
- fn node_method_ty(&self, method_call: ty::MethodCall) -> Option<Ty<'tcx>> {
- self.tcx()
- .tables
- .borrow()
- .method_map
- .get(&method_call)
- .map(|method| monomorphize_type(self, method.ty))
- }
-
- fn node_method_origin(&self, method_call: ty::MethodCall)
- -> Option<ty::MethodOrigin<'tcx>>
- {
- self.tcx()
- .tables
- .borrow()
- .method_map
- .get(&method_call)
- .map(|method| method.origin.clone())
- }
-
- fn adjustments<'a>(&'a self) -> Ref<NodeMap<ty::AutoAdjustment<'tcx>>> {
- // FIXME (@jroesch): this is becuase we currently have a HR inference problem
- // in the snapshot that causes this code not to work.
- fn project_adjustments<'a, 'tcx>(tables: &'a ty::Tables<'tcx>) ->
- &'a NodeMap<ty::AutoAdjustment<'tcx>> {
- &tables.adjustments
- }
-
- Ref::map(self.tcx().tables.borrow(), project_adjustments)
- }
-
- fn is_method_call(&self, id: ast::NodeId) -> bool {
- self.tcx().tables.borrow().method_map.contains_key(&ty::MethodCall::expr(id))
- }
-
- fn temporary_scope(&self, rvalue_id: ast::NodeId) -> Option<region::CodeExtent> {
- self.tcx().region_maps.temporary_scope(rvalue_id)
- }
-
- fn upvar_capture(&self, upvar_id: ty::UpvarId) -> Option<ty::UpvarCapture> {
- Some(self.tcx().tables.borrow().upvar_capture_map.get(&upvar_id).unwrap().clone())
- }
-
- fn type_moves_by_default(&self, ty: Ty<'tcx>, span: Span) -> bool {
- self.fcx.param_env.type_moves_by_default(ty, span)
- }
-}
-
-impl<'blk, 'tcx> ty::ClosureTyper<'tcx> for BlockS<'blk, 'tcx> {
- fn param_env<'a>(&'a self) -> &'a ty::ParameterEnvironment<'a, 'tcx> {
- &self.fcx.param_env
- }
-
- fn closure_kind(&self,
- def_id: ast::DefId)
- -> Option<ty::ClosureKind>
- {
- let typer = NormalizingClosureTyper::new(self.tcx());
- typer.closure_kind(def_id)
- }
-
- fn closure_type(&self,
- def_id: ast::DefId,
- substs: &subst::Substs<'tcx>)
- -> ty::ClosureTy<'tcx>
- {
- let typer = NormalizingClosureTyper::new(self.tcx());
- typer.closure_type(def_id, substs)
- }
-
- fn closure_upvars(&self,
- def_id: ast::DefId,
- substs: &Substs<'tcx>)
- -> Option<Vec<ty::ClosureUpvar<'tcx>>>
- {
- let typer = NormalizingClosureTyper::new(self.tcx());
- typer.closure_upvars(def_id, substs)
- }
-}
-
pub struct Result<'blk, 'tcx: 'blk> {
pub bcx: Block<'blk, 'tcx>,
pub val: ValueRef
trait_ref, trait_ref.def_id());
tcx.populate_implementations_for_trait_if_necessary(trait_ref.def_id());
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
// Do the initial selection for the obligation. This yields the
// shallow result we are looking for -- that is, what specific impl.
- let typer = NormalizingClosureTyper::new(tcx);
- let mut selcx = traits::SelectionContext::new(&infcx, &typer);
+ let infcx = infer::normalizing_infer_ctxt(tcx, &tcx.tables);
+ let mut selcx = traits::SelectionContext::new(&infcx);
+
let obligation =
traits::Obligation::new(traits::ObligationCause::misc(span, ast::DUMMY_NODE_ID),
trait_ref.to_poly_trait_predicate());
// Currently, we use a fulfillment context to completely resolve
// all nested obligations. This is because they can inform the
// inference of the impl's type parameters.
- let mut fulfill_cx = traits::FulfillmentContext::new(true);
+ let mut fulfill_cx = infcx.fulfillment_cx.borrow_mut();
let vtable = selection.map(|predicate| {
fulfill_cx.register_predicate_obligation(&infcx, predicate);
});
predicates);
let tcx = ccx.tcx();
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
- let typer = NormalizingClosureTyper::new(tcx);
- let mut selcx = traits::SelectionContext::new(&infcx, &typer);
- let mut fulfill_cx = traits::FulfillmentContext::new(false);
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None, true);
+ let mut selcx = traits::SelectionContext::new(&infcx);
+ let mut fulfill_cx = infcx.fulfillment_cx.borrow_mut();
let cause = traits::ObligationCause::dummy();
let traits::Normalized { value: predicates, obligations } =
traits::normalize(&mut selcx, cause.clone(), &predicates);
drain_fulfillment_cx(&infcx, &mut fulfill_cx, &()).is_ok()
}
-// NOTE: here is another use of parameter environment without an InferCtxt,
-// this is obviously related to the typer interface requiring a parameter env.
-// We should pay attention to this when refactoring
-// - @jroesch
-pub struct NormalizingClosureTyper<'a,'tcx:'a> {
- param_env: ty::ParameterEnvironment<'a, 'tcx>
-}
-
-impl<'a,'tcx> NormalizingClosureTyper<'a,'tcx> {
- pub fn new(tcx: &'a ty::ctxt<'tcx>) -> NormalizingClosureTyper<'a,'tcx> {
- // Parameter environment is used to give details about type parameters,
- // but since we are in trans, everything is fully monomorphized.
- NormalizingClosureTyper { param_env: tcx.empty_parameter_environment() }
- }
-}
-
-impl<'a,'tcx> ty::ClosureTyper<'tcx> for NormalizingClosureTyper<'a,'tcx> {
- fn param_env<'b>(&'b self) -> &'b ty::ParameterEnvironment<'b,'tcx> {
- &self.param_env
- }
-
- fn closure_kind(&self,
- def_id: ast::DefId)
- -> Option<ty::ClosureKind>
- {
- self.param_env.closure_kind(def_id)
- }
-
- fn closure_type(&self,
- def_id: ast::DefId,
- substs: &subst::Substs<'tcx>)
- -> ty::ClosureTy<'tcx>
- {
- // the substitutions in `substs` are already monomorphized,
- // but we still must normalize associated types
- let closure_ty = self.param_env.tcx.closure_type(def_id, substs);
- monomorphize::normalize_associated_type(self.param_env.tcx, &closure_ty)
- }
-
- fn closure_upvars(&self,
- def_id: ast::DefId,
- substs: &Substs<'tcx>)
- -> Option<Vec<ty::ClosureUpvar<'tcx>>>
- {
- // the substitutions in `substs` are already monomorphized,
- // but we still must normalize associated types
- let result = self.param_env.closure_upvars(def_id, substs);
- monomorphize::normalize_associated_type(self.param_env.tcx, &result)
- }
-}
-
pub fn drain_fulfillment_cx_or_panic<'a,'tcx,T>(span: Span,
infcx: &infer::InferCtxt<'a,'tcx>,
fulfill_cx: &mut traits::FulfillmentContext<'tcx>,
// In principle, we only need to do this so long as `result`
// contains unbound type parameters. It could be a slight
// optimization to stop iterating early.
- let typer = NormalizingClosureTyper::new(infcx.tcx);
- match fulfill_cx.select_all_or_error(infcx, &typer) {
+ match fulfill_cx.select_all_or_error(infcx) {
Ok(()) => { }
Err(errors) => {
return Err(errors);
use trans::expr;
use trans::tvec;
use trans::type_of;
-use middle::mem_categorization::Typer;
use middle::ty::Ty;
use std::fmt;
* affine values (since they must never be duplicated).
*/
- assert!(!bcx.tcx().empty_parameter_environment()
- .type_moves_by_default(self.ty, DUMMY_SP));
+ assert!(!self.ty
+ .moves_by_default(&bcx.tcx().empty_parameter_environment(), DUMMY_SP));
self.shallow_copy_raw(bcx, dst)
}
use trans::common::{C_bytes, CrateContext};
use trans::declare;
use trans::type_::Type;
-use middle::ty::ClosureTyper;
use session::config::NoDebugInfo;
use std::ffi::CString;
use metadata::csearch;
use middle::pat_util;
use middle::subst::{self, Substs};
+use middle::infer;
use rustc::ast_map;
use trans::{type_of, adt, machine, monomorphize};
-use trans::common::{self, CrateContext, FunctionContext, NormalizingClosureTyper, Block};
+use trans::common::{self, CrateContext, FunctionContext, Block};
use trans::_match::{BindingInfo, TrByCopy, TrByMove, TrByRef};
use trans::type_::Type;
-use middle::ty::{self, Ty, ClosureTyper};
+use middle::ty::{self, Ty};
use session::config::{self, FullDebugInfo};
use util::nodemap::FnvHashMap;
use util::common::path2cstr;
}
},
ty::TyClosure(def_id, substs) => {
- let typer = NormalizingClosureTyper::new(cx.tcx());
- let closure_ty = typer.closure_type(def_id, substs);
+ let infcx = infer::normalizing_infer_ctxt(cx.tcx(), &cx.tcx().tables);
+ let closure_ty = infcx.closure_type(def_id, substs);
self.get_unique_type_id_of_closure_type(cx,
closure_ty,
&mut unique_type_id);
subroutine_type_metadata(cx, unique_type_id, &barefnty.sig, usage_site_span)
}
ty::TyClosure(def_id, substs) => {
- let typer = NormalizingClosureTyper::new(cx.tcx());
- let sig = typer.closure_type(def_id, substs).sig;
+ let infcx = infer::normalizing_infer_ctxt(cx.tcx(), &cx.tcx().tables);
+ let sig = infcx.closure_type(def_id, substs).sig;
subroutine_type_metadata(cx, unique_type_id, &sig, usage_site_span)
}
ty::TyStruct(def_id, substs) => {
use trans::common::{NodeIdAndSpan, CrateContext, FunctionContext, Block};
use trans;
use trans::monomorphize;
-use middle::ty::{Ty, ClosureTyper};
+use middle::ty::Ty;
use session::config::{self, FullDebugInfo, LimitedDebugInfo, NoDebugInfo};
use util::nodemap::{DefIdMap, NodeMap, FnvHashMap, FnvHashSet};
use llvm::debuginfo::DIScope;
use rustc::ast_map;
use trans::common::CrateContext;
-use middle::ty::ClosureTyper;
use std::ffi::CString;
use std::ptr;
use trans::common::CrateContext;
use middle::subst::{self, Substs};
-use middle::ty::{self, Ty, ClosureTyper};
+use middle::ty::{self, Ty};
use syntax::ast;
use syntax::parse::token;
output.push('>');
}
}
-
//! * Use define_* family of methods when you might be defining the ValueRef.
//! * When in doubt, define.
use llvm::{self, ValueRef};
-use middle::ty::{self, ClosureTyper};
+use middle::ty;
+use middle::infer;
use syntax::abi;
use trans::attributes;
use trans::base;
-use trans::common;
use trans::context::CrateContext;
use trans::monomorphize;
use trans::type_::Type;
(&f.sig, f.abi, None)
}
ty::TyClosure(closure_did, substs) => {
- let typer = common::NormalizingClosureTyper::new(ccx.tcx());
- function_type = typer.closure_type(closure_did, substs);
+ let infcx = infer::normalizing_infer_ctxt(ccx.tcx(), &ccx.tcx().tables);
+ function_type = infcx.closure_type(closure_did, substs);
let self_type = base::self_type_for_closure(ccx, closure_did, fn_type);
let llenvironment_type = type_of::type_of_explicit_arg(ccx, self_type);
debug!("declare_rust_fn function_type={:?} self_type={:?}",
use middle::check_const;
use middle::def;
use middle::lang_items::CoerceUnsizedTraitLangItem;
-use middle::mem_categorization::Typer;
use middle::subst::{Substs, VecPerParamSpace};
use middle::traits;
use trans::{_match, adt, asm, base, callee, closure, consts, controlflow};
GEPi(bcx, fat_ptr, &[0, abi::FAT_PTR_ADDR])
}
-pub fn make_fat_ptr(bcx: Block, ty: Type, data: ValueRef, extra: ValueRef) -> ValueRef {
- InsertValue(bcx, InsertValue(bcx, C_undef(ty), data, 0), extra, 1)
-}
pub fn copy_fat_ptr(bcx: Block, src_ptr: ValueRef, dst_ptr: ValueRef) {
Store(bcx, Load(bcx, get_dataptr(bcx, src_ptr)), get_dataptr(bcx, dst_ptr));
Store(bcx, Load(bcx, get_len(bcx, src_ptr)), get_len(bcx, dst_ptr));
let ty = Type::from_ref(llvm::LLVMTypeOf(dtor_addr));
ty.element_type().func_params()
};
- assert_eq!(params.len(), 1);
+ assert_eq!(params.len(), if type_is_sized(bcx.tcx(), t) { 1 } else { 2 });
// Be sure to put the contents into a scope so we can use an invoke
// instruction to call the user destructor but still call the field
let glue_type = get_drop_glue_type(bcx.ccx(), t);
let dtor_ty = bcx.tcx().mk_ctor_fn(class_did, &[glue_type], bcx.tcx().mk_nil());
- let (_, bcx) = invoke(bcx, dtor_addr, &[v0], dtor_ty, DebugLoc::None);
+ let (_, bcx) = if type_is_sized(bcx.tcx(), t) {
+ invoke(bcx, dtor_addr, &[v0], dtor_ty, DebugLoc::None)
+ } else {
+ let args = [Load(bcx, expr::get_dataptr(bcx, v0)), Load(bcx, expr::get_len(bcx, v0))];
+ invoke(bcx, dtor_addr, &args, dtor_ty, DebugLoc::None)
+ };
bcx.fcx.pop_and_trans_custom_cleanup_scope(bcx, contents_scope)
}
use middle::subst::VecPerParamSpace;
use middle::subst;
use middle::traits;
-use middle::ty::ClosureTyper;
use rustc::ast_map;
use trans::base::*;
use trans::build::*;
}
// FIXME(#20304) -- cache
- // NOTE: @jroesch
- // Here is of an example where we do not use a param_env but use a typer instead.
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
- let typer = NormalizingClosureTyper::new(tcx);
- let mut selcx = traits::SelectionContext::new(&infcx, &typer);
+ let infcx = infer::normalizing_infer_ctxt(tcx, &tcx.tables);
+ let mut selcx = traits::SelectionContext::new(&infcx);
let cause = traits::ObligationCause::dummy();
let traits::Normalized { value: result, obligations } =
traits::normalize(&mut selcx, cause, &value);
result,
obligations);
- let mut fulfill_cx = traits::FulfillmentContext::new(true);
+ let mut fulfill_cx = infcx.fulfillment_cx.borrow_mut();
+
for obligation in obligations {
fulfill_cx.register_predicate_obligation(&infcx, obligation);
}
}
}
-/// Yields the types of the "real" arguments for this function. For most
-/// functions, these are simply the types of the arguments. For functions with
-/// the `RustCall` ABI, however, this untuples the arguments of the function.
-pub fn untuple_arguments_if_necessary<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>,
- inputs: &[Ty<'tcx>],
- abi: abi::Abi)
- -> Vec<Ty<'tcx>> {
- if abi != abi::RustCall {
- return inputs.iter().cloned().collect()
- }
-
+/// Yields the types of the "real" arguments for a function using the `RustCall`
+/// ABI by untupling the arguments of the function.
+pub fn untuple_arguments<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>,
+ inputs: &[Ty<'tcx>])
+ -> Vec<Ty<'tcx>> {
if inputs.is_empty() {
return Vec::new()
}
match inputs[inputs.len() - 1].sty {
ty::TyTuple(ref tupled_arguments) => {
- debug!("untuple_arguments_if_necessary(): untupling arguments");
+ debug!("untuple_arguments(): untupling arguments");
for &tupled_argument in tupled_arguments {
result.push(tupled_argument);
}
let mut atys: Vec<Type> = Vec::new();
// First, munge the inputs, if this has the `rust-call` ABI.
- let inputs = untuple_arguments_if_necessary(cx, &sig.inputs, abi);
+ let inputs = &if abi == abi::RustCall {
+ untuple_arguments(cx, &sig.inputs)
+ } else {
+ sig.inputs
+ };
// Arg 0: Output pointer.
// (if the output type is non-immediate)
}
// ... then explicit args.
- for input in &inputs {
+ for input in inputs {
let arg_ty = type_of_explicit_arg(cx, input);
if type_is_fat_ptr(cx.tcx(), input) {
use middle::ty::{self, RegionEscape, Ty, ToPredicate, HasTypeFlags};
use middle::ty_fold;
use rscope::{self, UnelidableRscope, RegionScope, ElidableRscope, ExplicitRscope,
- ObjectLifetimeDefaultRscope, ShiftedRscope, BindingRscope};
+ ObjectLifetimeDefaultRscope, ShiftedRscope, BindingRscope,
+ ElisionFailureInfo, ElidedLifetime};
use util::common::{ErrorReported, FN_OUTPUT_NAME};
use util::nodemap::FnvHashSet;
item_name: ast::Name)
-> Ty<'tcx>
{
- if self.tcx().binds_late_bound_regions(&poly_trait_ref) {
+ if let Some(trait_ref) = self.tcx().no_late_bound_regions(&poly_trait_ref) {
+ self.projected_ty(span, trait_ref, item_name)
+ } else {
+ // no late-bound regions, we can just ignore the binder
span_err!(self.tcx().sess, span, E0212,
"cannot extract an associated type from a higher-ranked trait bound \
in this context");
self.tcx().types.err
- } else {
- // no late-bound regions, we can just ignore the binder
- self.projected_ty(span, poly_trait_ref.0.clone(), item_name)
}
}
r
}
+fn report_elision_failure(
+ tcx: &ty::ctxt,
+ default_span: Span,
+ params: Vec<ElisionFailureInfo>)
+{
+ let mut m = String::new();
+ let len = params.len();
+ for (i, info) in params.into_iter().enumerate() {
+ let ElisionFailureInfo {
+ name, lifetime_count: n, have_bound_regions
+ } = info;
+
+ let help_name = if name.is_empty() {
+ format!("argument {}", i + 1)
+ } else {
+ format!("`{}`", name)
+ };
+
+ m.push_str(&(if n == 1 {
+ help_name
+ } else {
+ format!("one of {}'s {} elided {}lifetimes", help_name, n,
+ if have_bound_regions { "free " } else { "" } )
+ })[..]);
+
+ if len == 2 && i == 0 {
+ m.push_str(" or ");
+ } else if i + 2 == len {
+ m.push_str(", or ");
+ } else if i + 1 != len {
+ m.push_str(", ");
+ }
+ }
+ if len == 1 {
+ fileline_help!(tcx.sess, default_span,
+ "this function's return type contains a borrowed value, but \
+ the signature does not say which {} it is borrowed from",
+ m);
+ } else if len == 0 {
+ fileline_help!(tcx.sess, default_span,
+ "this function's return type contains a borrowed value, but \
+ there is no value for it to be borrowed from");
+ fileline_help!(tcx.sess, default_span,
+ "consider giving it a 'static lifetime");
+ } else {
+ fileline_help!(tcx.sess, default_span,
+ "this function's return type contains a borrowed value, but \
+ the signature does not say whether it is borrowed from {}",
+ m);
+ }
+}
+
pub fn opt_ast_region_to_region<'tcx>(
this: &AstConv<'tcx>,
rscope: &RegionScope,
ast_region_to_region(this.tcx(), lifetime)
}
- None => {
- match rscope.anon_regions(default_span, 1) {
- Err(v) => {
- debug!("optional region in illegal location");
- span_err!(this.tcx().sess, default_span, E0106,
- "missing lifetime specifier");
- match v {
- Some(v) => {
- let mut m = String::new();
- let len = v.len();
- for (i, (name, n)) in v.into_iter().enumerate() {
- let help_name = if name.is_empty() {
- format!("argument {}", i + 1)
- } else {
- format!("`{}`", name)
- };
-
- m.push_str(&(if n == 1 {
- help_name
- } else {
- format!("one of {}'s {} elided lifetimes", help_name, n)
- })[..]);
-
- if len == 2 && i == 0 {
- m.push_str(" or ");
- } else if i + 2 == len {
- m.push_str(", or ");
- } else if i + 1 != len {
- m.push_str(", ");
- }
- }
- if len == 1 {
- fileline_help!(this.tcx().sess, default_span,
- "this function's return type contains a borrowed value, but \
- the signature does not say which {} it is borrowed from",
- m);
- } else if len == 0 {
- fileline_help!(this.tcx().sess, default_span,
- "this function's return type contains a borrowed value, but \
- there is no value for it to be borrowed from");
- fileline_help!(this.tcx().sess, default_span,
- "consider giving it a 'static lifetime");
- } else {
- fileline_help!(this.tcx().sess, default_span,
- "this function's return type contains a borrowed value, but \
- the signature does not say whether it is borrowed from {}",
- m);
- }
- }
- None => {},
- }
- ty::ReStatic
+ None => match rscope.anon_regions(default_span, 1) {
+ Ok(rs) => rs[0],
+ Err(params) => {
+ span_err!(this.tcx().sess, default_span, E0106,
+ "missing lifetime specifier");
+ if let Some(params) = params {
+ report_elision_failure(this.tcx(), default_span, params);
}
-
- Ok(rs) => rs[0],
+ ty::ReStatic
}
}
};
/// Returns the appropriate lifetime to use for any output lifetimes
/// (if one exists) and a vector of the (pattern, number of lifetimes)
/// corresponding to each input type/pattern.
-fn find_implied_output_region(input_tys: &[Ty], input_pats: Vec<String>)
- -> (Option<ty::Region>, Vec<(String, usize)>)
+fn find_implied_output_region<'tcx>(tcx: &ty::ctxt<'tcx>,
+ input_tys: &[Ty<'tcx>],
+ input_pats: Vec<String>) -> ElidedLifetime
{
- let mut lifetimes_for_params: Vec<(String, usize)> = Vec::new();
+ let mut lifetimes_for_params = Vec::new();
let mut possible_implied_output_region = None;
for (input_type, input_pat) in input_tys.iter().zip(input_pats) {
- let mut accumulator = Vec::new();
- input_type.accumulate_lifetimes_in_type(&mut accumulator);
+ let mut regions = FnvHashSet();
+ let have_bound_regions = ty_fold::collect_regions(tcx,
+ input_type,
+ &mut regions);
+
+ debug!("find_implied_output_regions: collected {:?} from {:?} \
+ have_bound_regions={:?}", ®ions, input_type, have_bound_regions);
- if accumulator.len() == 1 {
+ if regions.len() == 1 {
// there's a chance that the unique lifetime of this
// iteration will be the appropriate lifetime for output
// parameters, so lets store it.
- possible_implied_output_region = Some(accumulator[0])
+ possible_implied_output_region = regions.iter().cloned().next();
}
- lifetimes_for_params.push((input_pat, accumulator.len()));
+ lifetimes_for_params.push(ElisionFailureInfo {
+ name: input_pat,
+ lifetime_count: regions.len(),
+ have_bound_regions: have_bound_regions
+ });
}
- let implied_output_region =
- if lifetimes_for_params.iter().map(|&(_, n)| n).sum::<usize>() == 1 {
- assert!(possible_implied_output_region.is_some());
- possible_implied_output_region
- } else {
- None
- };
- (implied_output_region, lifetimes_for_params)
+ if lifetimes_for_params.iter().map(|e| e.lifetime_count).sum::<usize>() == 1 {
+ Ok(possible_implied_output_region.unwrap())
+ } else {
+ Err(Some(lifetimes_for_params))
+ }
}
fn convert_ty_with_lifetime_elision<'tcx>(this: &AstConv<'tcx>,
- implied_output_region: Option<ty::Region>,
- param_lifetimes: Vec<(String, usize)>,
+ elided_lifetime: ElidedLifetime,
ty: &ast::Ty)
-> Ty<'tcx>
{
- match implied_output_region {
- Some(implied_output_region) => {
+ match elided_lifetime {
+ Ok(implied_output_region) => {
let rb = ElidableRscope::new(implied_output_region);
ast_ty_to_ty(this, &rb, ty)
}
- None => {
+ Err(param_lifetimes) => {
// All regions must be explicitly specified in the output
// if the lifetime elision rules do not apply. This saves
// the user from potentially-confusing errors.
.collect::<Vec<Ty<'tcx>>>();
let input_params: Vec<_> = repeat(String::new()).take(inputs.len()).collect();
- let (implied_output_region,
- params_lifetimes) = find_implied_output_region(&*inputs, input_params);
+ let implied_output_region = find_implied_output_region(this.tcx(), &inputs, input_params);
let input_ty = this.tcx().mk_tup(inputs);
Some(ref output_ty) => {
(convert_ty_with_lifetime_elision(this,
implied_output_region,
- params_lifetimes,
- &**output_ty),
+ &output_ty),
output_ty.span)
}
None => {
// here), if self is by-reference, then the implied output region is the
// region of the self parameter.
let mut explicit_self_category_result = None;
- let (self_ty, mut implied_output_region) = match opt_self_info {
+ let (self_ty, implied_output_region) = match opt_self_info {
None => (None, None),
Some(self_info) => {
// This type comes from an impl or trait; no late-bound
// Second, if there was exactly one lifetime (either a substitution or a
// reference) in the arguments, then any anonymous regions in the output
// have that lifetime.
- let lifetimes_for_params = if implied_output_region.is_none() {
- let input_tys = if self_ty.is_some() {
- // Skip the first argument if `self` is present.
- &self_and_input_tys[1..]
- } else {
- &self_and_input_tys[..]
- };
+ let implied_output_region = match implied_output_region {
+ Some(r) => Ok(r),
+ None => {
+ let input_tys = if self_ty.is_some() {
+ // Skip the first argument if `self` is present.
+ &self_and_input_tys[1..]
+ } else {
+ &self_and_input_tys[..]
+ };
- let (ior, lfp) = find_implied_output_region(input_tys, input_pats);
- implied_output_region = ior;
- lfp
- } else {
- vec![]
+ find_implied_output_region(this.tcx(), input_tys, input_pats)
+ }
};
let output_ty = match decl.output {
ast::Return(ref output) =>
ty::FnConverging(convert_ty_with_lifetime_elision(this,
implied_output_region,
- lifetimes_for_params,
- &**output)),
+ &output)),
ast::DefaultReturn(..) => ty::FnConverging(this.tcx().mk_nil()),
ast::NoReturn(..) => ty::FnDiverging
};
use middle::infer::InferCtxt;
use middle::traits::{self, FulfillmentContext, Normalized, MiscObligation,
SelectionContext, ObligationCause};
-use middle::ty::{self, HasTypeFlags};
+use middle::ty::HasTypeFlags;
use middle::ty_fold::TypeFoldable;
use syntax::ast;
use syntax::codemap::Span;
+//FIXME(@jroesch): Ideally we should be able to drop the fulfillment_cx argument.
pub fn normalize_associated_types_in<'a,'tcx,T>(infcx: &InferCtxt<'a,'tcx>,
- typer: &(ty::ClosureTyper<'tcx>+'a),
fulfillment_cx: &mut FulfillmentContext<'tcx>,
span: Span,
body_id: ast::NodeId,
where T : TypeFoldable<'tcx> + HasTypeFlags
{
debug!("normalize_associated_types_in(value={:?})", value);
- let mut selcx = SelectionContext::new(infcx, typer);
+ let mut selcx = SelectionContext::new(infcx);
let cause = ObligationCause::new(span, body_id, MiscObligation);
let Normalized { value: result, obligations } = traits::normalize(&mut selcx, cause, value);
debug!("normalize_associated_types_in: result={:?} predicates={:?}",
use CrateCtxt;
use middle::infer;
-use middle::ty::{self, Ty, ClosureTyper};
+use middle::ty::{self, Ty};
use syntax::ast;
use syntax::codemap::Span;
use syntax::parse::token;
expected_vid: ty::TyVid)
-> (Option<ty::FnSig<'tcx>>, Option<ty::ClosureKind>)
{
- let fulfillment_cx = fcx.inh.fulfillment_cx.borrow();
+ let fulfillment_cx = fcx.inh.infcx.fulfillment_cx.borrow();
// Here `expected_ty` is known to be a type inference variable.
let expected_sig =
};
let source = source.adjust_for_autoref(self.tcx(), reborrow);
- let mut selcx = traits::SelectionContext::new(self.fcx.infcx(), self.fcx.infcx());
+ let mut selcx = traits::SelectionContext::new(self.fcx.infcx());
// Use a FIFO queue for this custom fulfillment procedure.
let mut queue = VecDeque::new();
debug!("compare_impl_method: impl_trait_ref (liberated) = {:?}",
impl_trait_ref);
- let mut infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
- let mut fulfillment_cx = traits::FulfillmentContext::new(true);
+ let mut infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None, true);
+ let mut fulfillment_cx = infcx.fulfillment_cx.borrow_mut();
let trait_to_impl_substs = &impl_trait_ref.substs;
debug!("compare_impl_method: trait_bounds={:?}",
infcx.parameter_environment.caller_bounds);
- let mut selcx = traits::SelectionContext::new(&infcx, &infcx.parameter_environment);
+ let mut selcx = traits::SelectionContext::new(&infcx);
for predicate in impl_pred.fns {
let traits::Normalized { value: predicate, .. } =
impl_sig.subst(tcx, impl_to_skol_substs);
let impl_sig =
assoc::normalize_associated_types_in(&infcx,
- &impl_param_env,
&mut fulfillment_cx,
impl_m_span,
impl_m_body_id,
trait_sig.subst(tcx, &trait_to_skol_substs);
let trait_sig =
assoc::normalize_associated_types_in(&infcx,
- &impl_param_env,
&mut fulfillment_cx,
impl_m_span,
impl_m_body_id,
// Check that all obligations are satisfied by the implementation's
// version.
- match fulfillment_cx.select_all_or_error(&infcx, &infcx.parameter_environment) {
+ match fulfillment_cx.select_all_or_error(&infcx) {
Err(ref errors) => { traits::report_fulfillment_errors(&infcx, errors) }
Ok(_) => {}
}
debug!("compare_const_impl(impl_trait_ref={:?})",
impl_trait_ref);
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
- let mut fulfillment_cx = traits::FulfillmentContext::new(true);
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None, true);
+ let mut fulfillment_cx = infcx.fulfillment_cx.borrow_mut();
// The below is for the most part highly similar to the procedure
// for methods above. It is simpler in many respects, especially
// There is no "body" here, so just pass dummy id.
let impl_ty =
assoc::normalize_associated_types_in(&infcx,
- &impl_param_env,
&mut fulfillment_cx,
impl_c_span,
0,
&impl_ty);
+
debug!("compare_const_impl: impl_ty={:?}",
impl_ty);
let trait_ty =
assoc::normalize_associated_types_in(&infcx,
- &impl_param_env,
&mut fulfillment_cx,
impl_c_span,
0,
&trait_ty);
+
debug!("compare_const_impl: trait_ty={:?}",
trait_ty);
ty: named_type } =
tcx.lookup_item_type(self_type_did);
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None, false);
infcx.commit_if_ok(|snapshot| {
let (named_type_to_skolem, skol_map) =
use check::{self, FnCtxt, NoPreference, PreferMutLvalue, callee, demand};
use check::UnresolvedTypeAction;
-use middle::mem_categorization::Typer;
use middle::subst::{self};
use middle::traits;
use middle::ty::{self, Ty};
poly_trait_ref.to_predicate());
// Now we want to know if this can be matched
- let mut selcx = traits::SelectionContext::new(fcx.infcx(), fcx.infcx());
+ let mut selcx = traits::SelectionContext::new(fcx.infcx());
if !selcx.evaluate_obligation(&obligation) {
debug!("--> Cannot match obligation");
return None; // Cannot be matched, no such method resolution is possible.
// We can't use normalize_associated_types_in as it will pollute the
// fcx's fulfillment context after this probe is over.
let cause = traits::ObligationCause::misc(self.span, self.fcx.body_id);
- let mut selcx = &mut traits::SelectionContext::new(self.fcx.infcx(), self.fcx.infcx());
+ let mut selcx = &mut traits::SelectionContext::new(self.fcx.infcx());
let traits::Normalized { value: xform_self_ty, obligations } =
traits::normalize(selcx, cause, &xform_self_ty);
debug!("assemble_inherent_impl_probe: xform_self_ty = {:?}",
// as it will pollute the fcx's fulfillment context after this probe
// is over.
let cause = traits::ObligationCause::misc(self.span, self.fcx.body_id);
- let mut selcx = &mut traits::SelectionContext::new(self.fcx.infcx(), self.fcx.infcx());
+ let mut selcx = &mut traits::SelectionContext::new(self.fcx.infcx());
let traits::Normalized { value: xform_self_ty, obligations } =
traits::normalize(selcx, cause, &xform_self_ty);
match probe.kind {
InherentImplCandidate(impl_def_id, ref substs, ref ref_obligations) |
ExtensionImplCandidate(impl_def_id, _, ref substs, _, ref ref_obligations) => {
- let selcx = &mut traits::SelectionContext::new(self.infcx(), self.fcx.infcx());
+ let selcx = &mut traits::SelectionContext::new(self.infcx());
let cause = traits::ObligationCause::misc(self.span, self.fcx.body_id);
// Check whether the impl imposes obligations we have to worry about.
let obligation = Obligation::misc(span,
fcx.body_id,
poly_trait_ref.to_predicate());
- let mut selcx = SelectionContext::new(infcx, fcx.infcx());
+ let mut selcx = SelectionContext::new(infcx);
if selcx.evaluate_obligation(&obligation) {
span_stored_function();
use middle::ty::{self, HasTypeFlags, RegionEscape, ToPolyTraitRef, Ty};
use middle::ty::{MethodCall, MethodCallee};
use middle::ty_fold::{TypeFolder, TypeFoldable};
-use rscope::RegionScope;
+use rscope::{ElisionFailureInfo, RegionScope};
use session::Session;
use {CrateCtxt, lookup_full_def, require_same_types};
use TypeAndSubsts;
// one is never copied into the tcx: it is only used by regionck.
fn_sig_map: RefCell<NodeMap<Vec<Ty<'tcx>>>>,
- // Tracks trait obligations incurred during this function body.
- fulfillment_cx: RefCell<traits::FulfillmentContext<'tcx>>,
-
// When we process a call like `c()` where `c` is a closure type,
// we may not have decided yet whether `c` is a `Fn`, `FnMut`, or
// `FnOnce` closure. In that case, we defer full resolution of the
-> Inherited<'a, 'tcx> {
Inherited {
- infcx: infer::new_infer_ctxt(tcx, tables, Some(param_env)),
+ infcx: infer::new_infer_ctxt(tcx, tables, Some(param_env), true),
locals: RefCell::new(NodeMap()),
tables: tables,
fn_sig_map: RefCell::new(NodeMap()),
- fulfillment_cx: RefCell::new(traits::FulfillmentContext::new(true)),
deferred_call_resolutions: RefCell::new(DefIdMap()),
deferred_cast_checks: RefCell::new(Vec::new()),
}
}
fn normalize_associated_types_in<T>(&self,
- typer: &ty::ClosureTyper<'tcx>,
span: Span,
body_id: ast::NodeId,
value: &T)
-> T
where T : TypeFoldable<'tcx> + HasTypeFlags
{
- let mut fulfillment_cx = self.fulfillment_cx.borrow_mut();
+ let mut fulfillment_cx = self.infcx.fulfillment_cx.borrow_mut();
assoc::normalize_associated_types_in(&self.infcx,
- typer,
- &mut *fulfillment_cx, span,
+ &mut fulfillment_cx,
+ span,
body_id,
value)
}
ccx.tcx.liberate_late_bound_regions(region::DestructionScopeData::new(body.id),
&fn_sig);
let fn_sig =
- inh.normalize_associated_types_in(&inh.infcx.parameter_environment,
- body.span,
+ inh.normalize_associated_types_in(body.span,
body.id,
&fn_sig);
fn normalize_associated_types_in<T>(&self, span: Span, value: &T) -> T
where T : TypeFoldable<'tcx> + HasTypeFlags
{
- self.inh.normalize_associated_types_in(self.infcx(), span, self.body_id, value)
+ self.inh.normalize_associated_types_in(span, self.body_id, value)
}
fn normalize_associated_type(&self,
let cause = traits::ObligationCause::new(span,
self.body_id,
traits::ObligationCauseCode::MiscObligation);
- self.inh.fulfillment_cx
+ self.inh
+ .infcx
+ .fulfillment_cx
.borrow_mut()
.normalize_projection_type(self.infcx(),
- self.infcx(),
ty::ProjectionTy {
trait_ref: trait_ref,
item_name: item_name,
-> bool
{
traits::type_known_to_meet_builtin_bound(self.infcx(),
- self.param_env(),
ty,
ty::BoundSized,
span)
builtin_bound: ty::BuiltinBound,
cause: traits::ObligationCause<'tcx>)
{
- self.inh.fulfillment_cx.borrow_mut()
+ self.inh.infcx.fulfillment_cx.borrow_mut()
.register_builtin_bound(self.infcx(), ty, builtin_bound, cause);
}
{
debug!("register_predicate({:?})",
obligation);
- self.inh.fulfillment_cx
+ self.inh.infcx.fulfillment_cx
.borrow_mut()
.register_predicate_obligation(self.infcx(), obligation);
}
region: ty::Region,
cause: traits::ObligationCause<'tcx>)
{
- let mut fulfillment_cx = self.inh.fulfillment_cx.borrow_mut();
+ let mut fulfillment_cx = self.inh.infcx.fulfillment_cx.borrow_mut();
fulfillment_cx.register_region_obligation(ty, region, cause);
}
assert!(self.inh.deferred_call_resolutions.borrow().is_empty());
self.select_all_obligations_and_apply_defaults();
- let mut fulfillment_cx = self.inh.fulfillment_cx.borrow_mut();
- match fulfillment_cx.select_all_or_error(self.infcx(), self.infcx()) {
+ let mut fulfillment_cx = self.inh.infcx.fulfillment_cx.borrow_mut();
+ match fulfillment_cx.select_all_or_error(self.infcx()) {
Ok(()) => { }
Err(errors) => { report_fulfillment_errors(self.infcx(), &errors); }
}
/// Select as many obligations as we can at present.
fn select_obligations_where_possible(&self) {
match
- self.inh.fulfillment_cx
+ self.inh.infcx.fulfillment_cx
.borrow_mut()
- .select_where_possible(self.infcx(), self.infcx())
+ .select_where_possible(self.infcx())
{
Ok(()) => { }
Err(errors) => { report_fulfillment_errors(self.infcx(), &errors); }
/// work.
fn select_new_obligations(&self) {
match
- self.inh.fulfillment_cx
+ self.inh.infcx.fulfillment_cx
.borrow_mut()
- .select_new_obligations(self.infcx(), self.infcx())
+ .select_new_obligations(self.infcx())
{
Ok(()) => { }
Err(errors) => { report_fulfillment_errors(self.infcx(), &errors); }
}
fn anon_regions(&self, span: Span, count: usize)
- -> Result<Vec<ty::Region>, Option<Vec<(String, usize)>>> {
+ -> Result<Vec<ty::Region>, Option<Vec<ElisionFailureInfo>>> {
Ok((0..count).map(|_| {
self.infcx().next_region_var(infer::MiscVariable(span))
}).collect())
let inh = static_inherited_fields(ccx, &tables);
let rty = ccx.tcx.node_id_to_type(id);
let fcx = blank_fn_ctxt(ccx, &inh, ty::FnConverging(rty), e.id);
- let declty = fcx.ccx.tcx.tcache.borrow().get(&local_def(id)).unwrap().ty;
+ let declty = fcx.ccx.tcx.lookup_item_type(local_def(id)).ty;
check_const_with_ty(&fcx, sp, e, declty);
}
use check::dropck;
use check::FnCtxt;
use middle::free_region::FreeRegionMap;
-use middle::infer::InferCtxt;
use middle::implicator;
use middle::mem_categorization as mc;
use middle::region::CodeExtent;
use middle::subst::Substs;
use middle::traits;
-use middle::ty::{self, ClosureTyper, ReScope, Ty, MethodCall, HasTypeFlags};
+use middle::ty::{self, ReScope, Ty, MethodCall, HasTypeFlags};
use middle::infer::{self, GenericKind};
use middle::pat_util;
// Make a copy of the region obligations vec because we'll need
// to be able to borrow the fulfillment-cx below when projecting.
let region_obligations =
- self.fcx.inh.fulfillment_cx.borrow()
- .region_obligations(node_id)
- .to_vec();
+ self.fcx
+ .inh
+ .infcx
+ .fulfillment_cx
+ .borrow()
+ .region_obligations(node_id)
+ .to_vec();
for r_o in ®ion_obligations {
debug!("visit_region_obligations: r_o={:?}",
// Processing the region obligations should not cause the list to grow further:
assert_eq!(region_obligations.len(),
- self.fcx.inh.fulfillment_cx.borrow().region_obligations(node_id).len());
+ self.fcx.inh.infcx.fulfillment_cx.borrow().region_obligations(node_id).len());
}
/// This method populates the region map's `free_region_map`. It walks over the transformed
debug!("relate_free_regions(t={:?})", ty);
let body_scope = CodeExtent::from_node_id(body_id);
let body_scope = ty::ReScope(body_scope);
- let implications = implicator::implications(self.fcx.infcx(), self.fcx.infcx(), body_id,
+ let implications = implicator::implications(self.fcx.infcx(), body_id,
ty, body_scope, span);
// Record any relations between free regions that we observe into the free-region-map.
/// Link lifetimes of any ref bindings in `root_pat` to the pointers found in the discriminant, if
/// needed.
-fn link_pattern<'a, 'tcx>(rcx: &Rcx<'a, 'tcx>,
- mc: mc::MemCategorizationContext<InferCtxt<'a, 'tcx>>,
+fn link_pattern<'t, 'a, 'tcx>(rcx: &Rcx<'a, 'tcx>,
+ mc: mc::MemCategorizationContext<'t, 'a, 'tcx>,
discr_cmt: mc::cmt<'tcx>,
root_pat: &ast::Pat) {
debug!("link_pattern(discr_cmt={:?}, root_pat={:?})",
ty,
region);
- let implications = implicator::implications(rcx.fcx.infcx(), rcx.fcx.infcx(), rcx.body_id,
+ let implications = implicator::implications(rcx.fcx.infcx(), rcx.body_id,
ty, region, origin.span());
for implication in implications {
debug!("implication: {:?}", implication);
let predicates = fcx.tcx().lookup_super_predicates(poly_trait_ref.def_id());
let predicates = predicates.instantiate_supertrait(fcx.tcx(), &poly_trait_ref);
let predicates = {
- let selcx = &mut traits::SelectionContext::new(fcx.infcx(), fcx.infcx());
+ let selcx = &mut traits::SelectionContext::new(fcx.infcx());
traits::normalize(selcx, cause.clone(), &predicates)
};
for predicate in predicates.value.predicates {
};
debug!("new_polytype={:?}", new_polytype);
- tcx.tcache.borrow_mut().insert(new_did, new_polytype);
+ tcx.register_item_type(new_did, new_polytype);
tcx.predicates.borrow_mut().insert(new_did, new_method_ty.predicates.clone());
tcx.impl_or_trait_items
.borrow_mut()
debug!("check_implementations_of_coerce_unsized: {:?} -> {:?} (free)",
source, target);
- let infcx = new_infer_ctxt(tcx, &tcx.tables, Some(param_env));
+ let infcx = new_infer_ctxt(tcx, &tcx.tables, Some(param_env), true);
let check_mutbl = |mt_a: ty::mt<'tcx>, mt_b: ty::mt<'tcx>,
mk_ptr: &Fn(Ty<'tcx>) -> Ty<'tcx>| {
}
};
- let mut fulfill_cx = traits::FulfillmentContext::new(true);
+ let mut fulfill_cx = infcx.fulfillment_cx.borrow_mut();
// Register an obligation for `A: Trait<B>`.
let cause = traits::ObligationCause::misc(span, impl_did.node);
fulfill_cx.register_predicate_obligation(&infcx, predicate);
// Check that all transitive obligations are satisfied.
- if let Err(errors) = fulfill_cx.select_all_or_error(&infcx,
- &infcx.parameter_environment) {
+ if let Err(errors) = fulfill_cx.select_all_or_error(&infcx) {
traits::report_fulfillment_errors(&infcx, &errors);
}
pub fn check_coherence(crate_context: &CrateCtxt) {
CoherenceChecker {
crate_context: crate_context,
- inference_context: new_infer_ctxt(crate_context.tcx, &crate_context.tcx.tables, None),
+ inference_context: new_infer_ctxt(crate_context.tcx, &crate_context.tcx.tables, None, true),
inherent_impls: RefCell::new(FnvHashMap()),
}.check(crate_context.tcx.map.krate());
unsafety::check(crate_context.tcx);
impl1_def_id,
impl2_def_id);
- let infcx = infer::new_infer_ctxt(self.tcx, &self.tcx.tables, None);
+ let infcx = infer::new_infer_ctxt(self.tcx, &self.tcx.tables, None, false);
if traits::overlapping_impls(&infcx, impl1_def_id, impl2_def_id) {
self.report_overlap_error(trait_def_id, impl1_def_id, impl2_def_id);
}
ty: result_ty
};
- tcx.tcache.borrow_mut().insert(variant_def_id, variant_scheme.clone());
+ tcx.register_item_type(variant_def_id, variant_scheme.clone());
tcx.predicates.borrow_mut().insert(variant_def_id, enum_predicates.clone());
write_ty_to_tcx(tcx, variant.node.id, result_ty);
}
ccx.tcx.mk_bare_fn(ty_method.fty.clone()));
debug!("method {} (id {}) has type {:?}",
ident, id, fty);
- ccx.tcx.tcache.borrow_mut().insert(def_id,TypeScheme {
+ ccx.tcx.register_item_type(def_id, TypeScheme {
generics: ty_method.generics.clone(),
ty: fty
});
write_ty_to_tcx(ccx.tcx, v.node.id, tt);
/* add the field to the tcache */
- ccx.tcx.tcache.borrow_mut().insert(local_def(v.node.id),
- ty::TypeScheme {
- generics: struct_generics.clone(),
- ty: tt
- });
+ ccx.tcx.register_item_type(local_def(v.node.id),
+ ty::TypeScheme {
+ generics: struct_generics.clone(),
+ ty: tt
+ });
ccx.tcx.predicates.borrow_mut().insert(local_def(v.node.id),
struct_predicates.clone());
let selfty = ccx.icx(&ty_predicates).to_ty(&ExplicitRscope, &**selfty);
write_ty_to_tcx(tcx, it.id, selfty);
- tcx.tcache.borrow_mut().insert(local_def(it.id),
- TypeScheme { generics: ty_generics.clone(),
- ty: selfty });
+ tcx.register_item_type(local_def(it.id),
+ TypeScheme { generics: ty_generics.clone(),
+ ty: selfty });
tcx.predicates.borrow_mut().insert(local_def(it.id),
ty_predicates.clone());
if let ast::ConstImplItem(ref ty, ref expr) = impl_item.node {
let ty = ccx.icx(&ty_predicates)
.to_ty(&ExplicitRscope, &*ty);
- tcx.tcache.borrow_mut().insert(local_def(impl_item.id),
- TypeScheme {
- generics: ty_generics.clone(),
- ty: ty,
- });
+ tcx.register_item_type(local_def(impl_item.id),
+ TypeScheme {
+ generics: ty_generics.clone(),
+ ty: ty,
+ });
convert_associated_const(ccx, ImplContainer(local_def(it.id)),
impl_item.ident, impl_item.id,
impl_item.vis.inherit_from(parent_visibility),
ast::ConstTraitItem(ref ty, ref default) => {
let ty = ccx.icx(&trait_predicates)
.to_ty(&ExplicitRscope, ty);
- tcx.tcache.borrow_mut().insert(local_def(trait_item.id),
- TypeScheme {
- generics: trait_def.generics.clone(),
- ty: ty,
- });
+ tcx.register_item_type(local_def(trait_item.id),
+ TypeScheme {
+ generics: trait_def.generics.clone(),
+ ty: ty,
+ });
convert_associated_const(ccx, TraitContainer(local_def(it.id)),
trait_item.ident, trait_item.id,
ast::Public, ty, default.as_ref().map(|d| &**d));
// Enum-like.
write_ty_to_tcx(tcx, ctor_id, selfty);
- tcx.tcache.borrow_mut().insert(local_def(ctor_id), scheme);
+ tcx.register_item_type(local_def(ctor_id), scheme);
tcx.predicates.borrow_mut().insert(local_def(ctor_id), predicates);
} else if struct_def.fields[0].node.kind.is_unnamed() {
// Tuple-like.
let inputs: Vec<_> =
struct_def.fields
.iter()
- .map(|field| tcx.tcache.borrow().get(&local_def(field.node.id))
- .unwrap()
- .ty)
+ .map(|field| tcx.lookup_item_type(
+ local_def(field.node.id)).ty)
.collect();
let ctor_fn_ty = tcx.mk_ctor_fn(local_def(ctor_id),
&inputs[..],
selfty);
write_ty_to_tcx(tcx, ctor_id, ctor_fn_ty);
- tcx.tcache.borrow_mut().insert(local_def(ctor_id),
- TypeScheme {
- generics: scheme.generics,
- ty: ctor_fn_ty
- });
+ tcx.register_item_type(local_def(ctor_id),
+ TypeScheme {
+ generics: scheme.generics,
+ ty: ctor_fn_ty
+ });
tcx.predicates.borrow_mut().insert(local_def(ctor_id), predicates);
}
}
result
}
+fn convert_default_type_parameter<'a, 'tcx>(ccx: &CrateCtxt<'a, 'tcx>,
+ path: &P<ast::Ty>,
+ space: ParamSpace,
+ index: u32)
+ -> Ty<'tcx>
+{
+ let ty = ast_ty_to_ty(&ccx.icx(&()), &ExplicitRscope, &path);
+
+ for leaf_ty in ty.walk() {
+ if let ty::TyParam(p) = leaf_ty.sty {
+ if p.space == space && p.idx >= index {
+ span_err!(ccx.tcx.sess, path.span, E0128,
+ "type parameters with a default cannot use \
+ forward declared identifiers");
+
+ return ccx.tcx.types.err
+ }
+ }
+ }
+
+ ty
+}
+
fn get_or_create_type_parameter_def<'a,'tcx>(ccx: &CrateCtxt<'a,'tcx>,
ast_generics: &ast::Generics,
space: ParamSpace,
None => { }
}
- let default = match param.default {
- None => None,
- Some(ref path) => {
- let ty = ast_ty_to_ty(&ccx.icx(&()), &ExplicitRscope, &**path);
- let cur_idx = index;
-
- for leaf_ty in ty.walk() {
- if let ty::TyParam(p) = leaf_ty.sty {
- if p.idx > cur_idx {
- span_err!(tcx.sess, path.span, E0128,
- "type parameters with a default cannot use \
- forward declared identifiers");
- }
- }
- }
-
- Some(ty)
- }
- };
+ let default = param.default.as_ref().map(
+ |def| convert_default_type_parameter(ccx, def, space, index)
+ );
let object_lifetime_default =
compute_object_lifetime_default(ccx, param.id,
base_type,
base_type_free);
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None, false);
drop(::require_same_types(tcx,
Some(&infcx),
false,
* before we really have a `ParameterEnvironment` to check.
*/
- ty_fold::fold_regions(tcx, value, |region, _| {
+ ty_fold::fold_regions(tcx, value, &mut false, |region, _| {
match region {
ty::ReEarlyBound(data) => {
let def_id = local_def(data.param_id);
```
"##,
+E0092: r##"
+You tried to declare an undefined atomic operation function.
+Erroneous code example:
+
+```
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+ fn atomic_foo(); // error: unrecognized atomic operation
+ // function
+}
+```
+
+Please check you didn't make a mistake in the function's name. All intrinsic
+functions are defined in librustc_trans/trans/intrinsic.rs and in
+libcore/intrinsics.rs in the Rust source code. Example:
+
+```
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+ fn atomic_fence(); // ok!
+}
+```
+"##,
+
+E0093: r##"
+You declared an unknown intrinsic function. Erroneous code example:
+
+```
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+ fn foo(); // error: unrecognized intrinsic function: `foo`
+}
+
+fn main() {
+ unsafe {
+ foo();
+ }
+}
+```
+
+Please check you didn't make a mistake in the function's name. All intrinsic
+functions are defined in librustc_trans/trans/intrinsic.rs and in
+libcore/intrinsics.rs in the Rust source code. Example:
+
+```
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+ fn atomic_fence(); // ok!
+}
+
+fn main() {
+ unsafe {
+ atomic_fence();
+ }
+}
+```
+"##,
+
+E0094: r##"
+You gave an invalid number of type parameters to an intrinsic function.
+Erroneous code example:
+
+```
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+ fn size_of<T, U>() -> usize; // error: intrinsic has wrong number
+ // of type parameters
+}
+```
+
+Please check that you provided the right number of lifetime parameters
+and verify with the function declaration in the Rust source code.
+Example:
+
+```
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+ fn size_of<T>() -> usize; // ok!
+}
+```
+"##,
+
+E0101: r##"
+You hit this error because the compiler the compiler lacks information
+to determine a type for this expression. Erroneous code example:
+
+```
+fn main() {
+ let x = |_| {}; // error: cannot determine a type for this expression
+}
+```
+
+You have two possibilities to solve this situation:
+ * Give an explicit definition of the expression
+ * Infer the expression
+
+Examples:
+
+```
+fn main() {
+ let x = |_ : u32| {}; // ok!
+ // or:
+ let x = |_| {};
+ x(0u32);
+}
+```
+"##,
+
E0106: r##"
This error indicates that a lifetime is missing from a type. If it is an error
inside a function signature, the problem may be with failing to adhere to the
```
"##,
+E0117: r##"
+You got this error because because you tried to implement a foreign
+trait for a foreign type (with maybe a foreign type parameter). Erroneous
+code example:
+
+```
+impl Drop for u32 {}
+```
+
+The type, trait or the type parameter (or all of them) has to be defined
+in your crate. Example:
+
+```
+pub struct Foo; // you define your type in your crate
+
+impl Drop for Foo { // and you can implement the trait on it!
+ // code of trait implementation here
+}
+
+trait Bar { // or define your trait in your crate
+ fn get(&self) -> usize;
+}
+
+impl Bar for u32 { // and then you implement it on a foreign type
+ fn get(&self) -> usize { 0 }
+}
+
+impl From<Foo> for i32 { // or you use a type from your crate as
+ // a type parameter
+ fn from(i: Foo) -> i32 {
+ 0
+ }
+}
+```
+"##,
+
+E0119: r##"
+There are conflicting trait implementations for the same type.
+Erroneous code example:
+
+```
+trait MyTrait {
+ fn get(&self) -> usize;
+}
+
+impl<T> MyTrait for T {
+ fn get(&self) -> usize { 0 }
+}
+
+struct Foo {
+ value: usize
+}
+
+impl MyTrait for Foo { // error: conflicting implementations for trait
+ // `MyTrait`
+ fn get(&self) -> usize { self.value }
+}
+```
+
+When you write:
+
+```
+impl<T> MyTrait for T {
+ fn get(&self) -> usize { 0 }
+}
+```
+
+This makes the trait implemented on all types in the scope. So if you
+try to implement it on another one after that, the implementations will
+conflict. Example:
+
+```
+trait MyTrait {
+ fn get(&self) -> usize;
+}
+
+impl<T> MyTrait for T {
+ fn get(&self) -> usize { 0 }
+}
+
+struct Foo;
+
+fn main() {
+ let f = Foo;
+
+ f.get(); // the trait is implemented so we can use it
+}
+```
+"##,
+
E0121: r##"
In order to be consistent with Rust's lack of global type inference, type
placeholders are disallowed by design in item signatures.
```
"##,
+E0124: r##"
+You declared two fields of a struct with the same name. Erroneous code
+example:
+
+```
+struct Foo {
+ field1: i32,
+ field1: i32 // error: field is already declared
+}
+```
+
+Please verify that the field names have been correctly spelled. Example:
+
+```
+struct Foo {
+ field1: i32,
+ field2: i32 // ok!
+}
+```
+"##,
+
E0131: r##"
It is not possible to define `main` with type parameters, or even with function
parameters. When `main` is present, it must take no arguments and return `()`.
rfcs/blob/master/text/0019-opt-in-builtin-traits.md).
"##,
+E0195: r##"
+Your method's lifetime parameters do not match the trait declaration.
+Erroneous code example:
+
+```
+trait Trait {
+ fn bar<'a,'b:'a>(x: &'a str, y: &'b str);
+}
+
+struct Foo;
+
+impl Trait for Foo {
+ fn bar<'a,'b>(x: &'a str, y: &'b str) {
+ // error: lifetime parameters or bounds on method `bar`
+ // do not match the trait declaration
+ }
+}
+```
+
+The lifetime constraint `'b` for bar() implementation does not match the
+trait declaration. Ensure lifetime declarations match exactly in both trait
+declaration and implementation. Example:
+
+```
+trait Trait {
+ fn t<'a,'b:'a>(x: &'a str, y: &'b str);
+}
+
+struct Foo;
+
+impl Trait for Foo {
+ fn t<'a,'b:'a>(x: &'a str, y: &'b str) { // ok!
+ }
+}
+```
+"##,
+
E0197: r##"
Inherent implementations (one that do not implement a trait but provide
methods associated with a type) are always safe because they are not
```
"##,
+E0207: r##"
+You declared an unused type parameter when implementing a trait on an object.
+Erroneous code example:
+
+```
+trait MyTrait {
+ fn get(&self) -> usize;
+}
+
+struct Foo;
+
+impl<T> MyTrait for Foo {
+ fn get(&self) -> usize {
+ 0
+ }
+}
+```
+
+Please check your object definition and remove unused type
+parameter(s). Example:
+
+```
+trait MyTrait {
+ fn get(&self) -> usize;
+}
+
+struct Foo;
+
+impl MyTrait for Foo {
+ fn get(&self) -> usize {
+ 0
+ }
+}
+```
+"##,
+
+E0211: r##"
+You used an intrinsic function which doesn't correspond to its
+definition. Erroneous code example:
+
+```
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+ fn size_of<T>(); // error: intrinsic has wrong type
+}
+```
+
+Please check the function definition. Example:
+
+```
+#![feature(intrinsics)]
+
+extern "rust-intrinsic" {
+ fn size_of<T>() -> usize;
+}
+```
+"##,
+
E0243: r##"
This error indicates that not enough type parameters were found in a type or
trait.
E0085,
E0086,
E0090,
- E0092,
- E0093,
- E0094,
- E0101,
E0102,
E0103,
E0104,
- E0117,
E0118,
- E0119,
E0120,
E0122,
E0123,
- E0124,
E0127,
E0128,
E0129,
E0193, // cannot bound type where clause bounds may only be attached to types
// involving type parameters
E0194,
- E0195, // lifetime parameters or bounds on method do not match the trait declaration
E0196, // cannot determine a type for this closure
E0203, // type parameter has more than one relaxed default bound,
// and only one is supported
- E0207, // type parameter is not constrained by the impl trait, self type, or predicate
E0208,
E0209, // builtin traits can only be implemented on structs or enums
E0210, // type parameter is not constrained by any local type
- E0211,
E0212, // cannot extract an associated type from a higher-ranked trait bound
E0213, // associated types are not accepted in this context
E0214, // parenthesized parameters may only be used with a trait
{
let result = match maybe_infcx {
None => {
- let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None);
+ let infcx = infer::new_infer_ctxt(tcx, &tcx.tables, None, false);
infer::mk_eqty(&infcx, t1_is_expected, infer::Misc(span), t1, t2)
}
Some(infcx) => {
use std::iter::repeat;
use syntax::codemap::Span;
+#[derive(Clone)]
+pub struct ElisionFailureInfo {
+ pub name: String,
+ pub lifetime_count: usize,
+ pub have_bound_regions: bool
+}
+
+pub type ElidedLifetime = Result<ty::Region, Option<Vec<ElisionFailureInfo>>>;
+
/// Defines strategies for handling regions that are omitted. For
/// example, if one writes the type `&Foo`, then the lifetime of
/// this reference has been omitted. When converting this
fn anon_regions(&self,
span: Span,
count: usize)
- -> Result<Vec<ty::Region>, Option<Vec<(String, usize)>>>;
+ -> Result<Vec<ty::Region>, Option<Vec<ElisionFailureInfo>>>;
/// If an object omits any explicit lifetime bound, and none can
/// be derived from the object traits, what should we use? If
fn anon_regions(&self,
_span: Span,
_count: usize)
- -> Result<Vec<ty::Region>, Option<Vec<(String, usize)>>> {
+ -> Result<Vec<ty::Region>, Option<Vec<ElisionFailureInfo>>> {
Err(None)
}
}
// Same as `ExplicitRscope`, but provides some extra information for diagnostics
-pub struct UnelidableRscope(Vec<(String, usize)>);
+pub struct UnelidableRscope(Option<Vec<ElisionFailureInfo>>);
impl UnelidableRscope {
- pub fn new(v: Vec<(String, usize)>) -> UnelidableRscope {
+ pub fn new(v: Option<Vec<ElisionFailureInfo>>) -> UnelidableRscope {
UnelidableRscope(v)
}
}
fn anon_regions(&self,
_span: Span,
_count: usize)
- -> Result<Vec<ty::Region>, Option<Vec<(String, usize)>>> {
+ -> Result<Vec<ty::Region>, Option<Vec<ElisionFailureInfo>>> {
let UnelidableRscope(ref v) = *self;
- Err(Some(v.clone()))
+ Err(v.clone())
}
}
fn anon_regions(&self,
_span: Span,
count: usize)
- -> Result<Vec<ty::Region>, Option<Vec<(String, usize)>>>
+ -> Result<Vec<ty::Region>, Option<Vec<ElisionFailureInfo>>>
{
Ok(repeat(self.default).take(count).collect())
}
fn anon_regions(&self,
_: Span,
count: usize)
- -> Result<Vec<ty::Region>, Option<Vec<(String, usize)>>>
+ -> Result<Vec<ty::Region>, Option<Vec<ElisionFailureInfo>>>
{
Ok((0..count).map(|_| self.next_region()).collect())
}
fn anon_regions(&self,
span: Span,
count: usize)
- -> Result<Vec<ty::Region>, Option<Vec<(String, usize)>>>
+ -> Result<Vec<ty::Region>, Option<Vec<ElisionFailureInfo>>>
{
self.base_scope.anon_regions(span, count)
}
fn anon_regions(&self,
span: Span,
count: usize)
- -> Result<Vec<ty::Region>, Option<Vec<(String, usize)>>>
+ -> Result<Vec<ty::Region>, Option<Vec<ElisionFailureInfo>>>
{
match self.base_scope.anon_regions(span, count) {
Ok(mut v) => {
#[cfg(any(target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
mod os {
use libc;
-// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Add all the static files. These may already exist, but we just
// overwrite them anyway to make sure that they're fresh and up-to-date.
try!(write(cx.dst.join("jquery.js"),
- include_bytes!("static/jquery-2.1.0.min.js")));
+ include_bytes!("static/jquery-2.1.4.min.js")));
try!(write(cx.dst.join("main.js"), include_bytes!("static/main.js")));
try!(write(cx.dst.join("playpen.js"), include_bytes!("static/playpen.js")));
try!(write(cx.dst.join("main.css"), include_bytes!("static/main.css")));
+++ /dev/null
-/*! jQuery v2.1.0 | (c) 2005, 2014 jQuery Foundation, Inc. | jquery.org/license */
-!function(a,b){"object"==typeof module&&"object"==typeof module.exports?module.exports=a.document?b(a,!0):function(a){if(!a.document)throw new Error("jQuery requires a window with a document");return b(a)}:b(a)}("undefined"!=typeof window?window:this,function(a,b){var c=[],d=c.slice,e=c.concat,f=c.push,g=c.indexOf,h={},i=h.toString,j=h.hasOwnProperty,k="".trim,l={},m=a.document,n="2.1.0",o=function(a,b){return new o.fn.init(a,b)},p=/^-ms-/,q=/-([\da-z])/gi,r=function(a,b){return b.toUpperCase()};o.fn=o.prototype={jquery:n,constructor:o,selector:"",length:0,toArray:function(){return d.call(this)},get:function(a){return null!=a?0>a?this[a+this.length]:this[a]:d.call(this)},pushStack:function(a){var b=o.merge(this.constructor(),a);return b.prevObject=this,b.context=this.context,b},each:function(a,b){return o.each(this,a,b)},map:function(a){return this.pushStack(o.map(this,function(b,c){return a.call(b,c,b)}))},slice:function(){return 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highlightSourceLines(null);
$(window).on('hashchange', highlightSourceLines);
- $(document).on('keyup', function handleKeyboardShortcut(e) {
+ // Helper function for Keyboard events,
+ // Get's the char from the keypress event
+ //
+ // This method is used because e.wich === x is not
+ // compatible with non-english keyboard layouts
+ //
+ // Note: event.type must be keypress !
+ function getChar(event) {
+ if (event.which == null) {
+ return String.fromCharCode(event.keyCode) // IE
+ } else if (event.which!=0 && event.charCode!=0) {
+ return String.fromCharCode(event.which) // the rest
+ } else {
+ return null // special key
+ }
+ }
+
+ $(document).on('keypress', function handleKeyboardShortcut(e) {
if (document.activeElement.tagName === 'INPUT') {
return;
}
- if (e.which === 191) { // question mark
+ if (getChar(e) === '?') {
if (e.shiftKey && $('#help').hasClass('hidden')) {
e.preventDefault();
$('#help').removeClass('hidden');
}
- } else if (e.which === 27) { // esc
+ } else if (getChar(e) === 's' || getChar(e) === 'S') {
+ e.preventDefault();
+ $('.search-input').focus();
+ }
+ }).on('keydown', function(e) {
+ // The escape key event has to be captured with the keydown event.
+ // Because keypressed has no keycode for the escape key
+ // (and other special keys in general)...
+ if (document.activeElement.tagName === 'INPUT') {
+ return;
+ }
+
+ if (e.keyCode === 27) { // escape key
if (!$('#help').hasClass('hidden')) {
e.preventDefault();
$('#help').addClass('hidden');
$('#search').addClass('hidden');
$('#main').removeClass('hidden');
}
- } else if (e.which === 83) { // S
- e.preventDefault();
- $('.search-input').focus();
}
}).on('click', function(e) {
if (!$(e.target).closest('#help').length) {
}
});
+
$('.version-selector').on('change', function() {
var i, match,
url = document.location.href,
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
fn test_errors_do_not_crash() {
// Open /dev/null as a library to get an error, and make sure
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
mod dl {
use prelude::v1::*;
/// - freebsd
/// - dragonfly
/// - bitrig
+ /// - netbsd
/// - openbsd
/// - android
/// - windows
pub const EXE_EXTENSION: &'static str = "";
}
+#[cfg(target_os = "netbsd")]
+mod os {
+ pub const FAMILY: &'static str = "unix";
+ pub const OS: &'static str = "netbsd";
+ pub const DLL_PREFIX: &'static str = "lib";
+ pub const DLL_SUFFIX: &'static str = ".so";
+ pub const DLL_EXTENSION: &'static str = "so";
+ pub const EXE_SUFFIX: &'static str = "";
+ pub const EXE_EXTENSION: &'static str = "";
+}
+
#[cfg(target_os = "openbsd")]
mod os {
pub const FAMILY: &'static str = "unix";
///
/// For detailed semantics of this method, see the documentation on
/// `BufRead::read_line`.
+ ///
+ /// # Examples
+ ///
+ /// ```no_run
+ /// use std::io;
+ ///
+ /// let mut input = String::new();
+ /// match io::stdin().read_line(&mut input) {
+ /// Ok(n) => {
+ /// println!("{} bytes read", n);
+ /// println!("{}", input);
+ /// }
+ /// Err(error) => println!("error: {}", error),
+ /// }
+ /// ```
+ ///
+ /// You can run the example one of two ways:
+ ///
+ /// - Pipe some text to it, e.g. `printf foo | path/to/executable`
+ /// - Give it text interactively by running the executable directly,
+ // in which case it will wait for the Enter key to be pressed before
+ /// continuing
#[stable(feature = "rust1", since = "1.0.0")]
pub fn read_line(&mut self, buf: &mut String) -> io::Result<usize> {
self.lock().read_line(buf)
// FIXME: re-enabled bitrig/openbsd tests once their socket timeout code
// no longer has rounding errors.
- #[cfg_attr(any(target_os = "bitrig", target_os = "openbsd"), ignore)]
+ #[cfg_attr(any(target_os = "bitrig", target_os = "netbsd", target_os = "openbsd"), ignore)]
#[test]
fn timeouts() {
let addr = next_test_ip4();
assert_eq!(format!("{:?}", udpsock), compare);
}
- // FIXME: re-enabled bitrig/openbsd tests once their socket timeout code
+ // FIXME: re-enabled bitrig/openbsd/netbsd tests once their socket timeout code
// no longer has rounding errors.
- #[cfg_attr(any(target_os = "bitrig", target_os = "openbsd"), ignore)]
+ #[cfg_attr(any(target_os = "bitrig", target_os = "netbsd", target_os = "openbsd"), ignore)]
#[test]
fn timeouts() {
let addr = next_test_ip4();
#[cfg(target_os = "linux")] pub mod linux;
#[cfg(target_os = "macos")] pub mod macos;
#[cfg(target_os = "nacl")] pub mod nacl;
+#[cfg(target_os = "netbsd")] pub mod netbsd;
#[cfg(target_os = "openbsd")] pub mod openbsd;
pub mod raw;
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! OpenBSD-specific definitions
+
+#![stable(feature = "raw_ext", since = "1.1.0")]
+
+pub mod raw;
+
+pub mod fs {
+ #![stable(feature = "raw_ext", since = "1.1.0")]
+ pub use sys::fs::MetadataExt;
+}
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! NetBSD/OpenBSD-specific raw type definitions
+
+#![stable(feature = "raw_ext", since = "1.1.0")]
+
+use os::raw::c_long;
+use os::unix::raw::{uid_t, gid_t};
+
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type blkcnt_t = i64;
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type blksize_t = u32;
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type dev_t = i32;
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type fflags_t = u32;
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type ino_t = u64;
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type mode_t = u32;
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type nlink_t = u32;
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type off_t = i64;
+#[stable(feature = "raw_ext", since = "1.1.0")] pub type time_t = i64;
+
+#[repr(C)]
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub struct stat {
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_mode: mode_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_dev: dev_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_ino: ino_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_nlink: nlink_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_uid: uid_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_gid: gid_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_rdev: dev_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_atime: time_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_atime_nsec: c_long,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_mtime: time_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_mtime_nsec: c_long,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_ctime: time_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_ctime_nsec: c_long,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_size: off_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_blocks: blkcnt_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_blksize: blksize_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_flags: fflags_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_gen: u32,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_birthtime: time_t,
+ #[stable(feature = "raw_ext", since = "1.1.0")]
+ pub st_birthtime_nsec: c_long,
+}
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
mod imp {
use prelude::v1::*;
#[link(name = "unwind", kind = "static")]
extern {}
-#[cfg(any(target_os = "android", target_os = "openbsd"))]
+#[cfg(any(target_os = "android", target_os = "netbsd", target_os = "openbsd"))]
#[link(name = "gcc")]
extern {}
#[cfg(any(target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
#[link(name = "pthread")]
extern {}
/// If the corresponding `Sender` has disconnected, or it disconnects while
/// this call is blocking, this call will wake up and return `Err` to
/// indicate that no more messages can ever be received on this channel.
+ /// However, since channels are buffered, messages sent before the disconnect
+ /// will still be properly received.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use std::sync::mpsc;
+ /// use std::thread;
+ ///
+ /// let (send, recv) = mpsc::channel();
+ /// let handle = thread::spawn(move || {
+ /// send.send(1u8).unwrap();
+ /// });
+ ///
+ /// handle.join().unwrap();
+ ///
+ /// assert_eq!(Ok(1), recv.recv());
+ /// ```
+ ///
+ /// Buffering behavior:
+ ///
+ /// ```
+ /// use std::sync::mpsc;
+ /// use std::thread;
+ /// use std::sync::mpsc::RecvError;
+ ///
+ /// let (send, recv) = mpsc::channel();
+ /// let handle = thread::spawn(move || {
+ /// send.send(1u8).unwrap();
+ /// send.send(2).unwrap();
+ /// send.send(3).unwrap();
+ /// drop(send);
+ /// });
+ ///
+ /// // wait for the thread to join so we ensure the sender is dropped
+ /// handle.join().unwrap();
+ ///
+ /// assert_eq!(Ok(1), recv.recv());
+ /// assert_eq!(Ok(2), recv.recv());
+ /// assert_eq!(Ok(3), recv.recv());
+ /// assert_eq!(Err(RecvError), recv.recv());
+ /// ```
#[stable(feature = "rust1", since = "1.0.0")]
pub fn recv(&self) -> Result<T, RecvError> {
loop {
target_arch = "powerpc",
all(target_arch = "arm", target_os = "ios"),
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
unsafe fn target_record_sp_limit(_: usize) {
}
target_arch = "powerpc",
all(target_arch = "arm", target_os = "ios"),
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
#[inline(always)]
unsafe fn target_get_sp_limit() -> usize {
let selfname = if cfg!(target_os = "freebsd") ||
cfg!(target_os = "dragonfly") ||
cfg!(target_os = "bitrig") ||
+ cfg!(target_os = "netbsd") ||
cfg!(target_os = "openbsd") {
env::current_exe().ok()
} else {
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
pub const FIOCLEX: libc::c_ulong = 0x20006601;
target_os = "dragonfly"))]
pub const _SC_GETPW_R_SIZE_MAX: libc::c_int = 71;
#[cfg(any(target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
pub const _SC_GETPW_R_SIZE_MAX: libc::c_int = 101;
#[cfg(target_os = "android")]
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
pub struct passwd {
pub pw_name: *mut libc::c_char,
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
mod signal_os {
use libc;
pub struct sigset_t {
bits: [u32; 4],
}
- #[cfg(any(target_os = "bitrig", target_os = "openbsd"))]
+ #[cfg(any(target_os = "bitrig", target_os = "netbsd", target_os = "openbsd"))]
pub type sigset_t = libc::c_uint;
// This structure has more fields, but we're not all that interested in
pub _status: libc::c_int,
pub si_addr: *mut libc::c_void
}
- #[cfg(any(target_os = "bitrig", target_os = "openbsd"))]
+ #[cfg(any(target_os = "bitrig", target_os = "netbsd", target_os = "openbsd"))]
#[repr(C)]
pub struct siginfo {
pub si_signo: libc::c_int,
}
#[cfg(any(target_os = "macos", target_os = "ios",
- target_os = "bitrig", target_os = "openbsd"))]
+ target_os = "bitrig", target_os = "netbsd", target_os = "openbsd"))]
#[repr(C)]
pub struct sigaction {
pub sa_sigaction: sighandler_t,
#[cfg(target_os = "linux")] pub use os::linux as platform;
#[cfg(target_os = "macos")] pub use os::macos as platform;
#[cfg(target_os = "nacl")] pub use os::nacl as platform;
+#[cfg(target_os = "netbsd")] pub use os::netbsd as platform;
#[cfg(target_os = "openbsd")] pub use os::openbsd as platform;
pub mod backtrace;
__error()
}
- #[cfg(target_os = "bitrig")]
- fn errno_location() -> *const c_int {
- extern {
- fn __errno() -> *const c_int;
- }
- unsafe {
- __errno()
- }
- }
-
#[cfg(target_os = "dragonfly")]
unsafe fn errno_location() -> *const c_int {
extern { fn __dfly_error() -> *const c_int; }
__dfly_error()
}
- #[cfg(target_os = "openbsd")]
+ #[cfg(any(target_os = "bitrig", target_os = "netbsd", target_os = "openbsd"))]
unsafe fn errno_location() -> *const c_int {
extern { fn __errno() -> *const c_int; }
__errno()
::fs::read_link("/proc/curproc/file")
}
-#[cfg(any(target_os = "bitrig", target_os = "openbsd"))]
+#[cfg(any(target_os = "bitrig", target_os = "netbsd", target_os = "openbsd"))]
pub fn current_exe() -> io::Result<PathBuf> {
use sync::StaticMutex;
static LOCK: StaticMutex = StaticMutex::new();
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
pub fn args() -> Args {
use rt;
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
mod imp {
pub fn WIFEXITED(status: i32) -> bool { (status & 0x7f) == 0 }
#[cfg(any(target_os = "linux",
target_os = "macos",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
mod imp {
use sys_common::stack;
#[cfg(not(any(target_os = "linux",
target_os = "macos",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd")))]
mod imp {
use libc;
#[cfg(any(target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
mod os {
use libc;
#[cfg(any(target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
pub fn set_name(name: &str) {
extern {
#[cfg(all(not(target_os = "linux"),
not(target_os = "macos"),
not(target_os = "bitrig"),
+ not(target_os = "netbsd"),
not(target_os = "openbsd")))]
pub mod guard {
pub unsafe fn current() -> usize { 0 }
#[cfg(any(target_os = "linux",
target_os = "macos",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
#[allow(unused_imports)]
pub mod guard {
#[cfg(any(target_os = "macos",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
unsafe fn get_stack_start() -> *mut libc::c_void {
current() as *mut libc::c_void
pthread_get_stacksize_np(pthread_self())) as usize
}
- #[cfg(any(target_os = "openbsd", target_os = "bitrig"))]
+ #[cfg(any(target_os = "openbsd", target_os = "netbsd", target_os = "bitrig"))]
pub unsafe fn current() -> usize {
#[repr(C)]
struct stack_t {
#[cfg(any(target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd"))]
type pthread_key_t = ::libc::c_int;
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd")))]
type pthread_key_t = ::libc::c_uint;
// OpenBSD provide it via libc
#[cfg(not(any(target_os = "android",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd",
target_env = "musl")))]
#[link(name = "rt")]
pub const STD_OUTPUT_HANDLE: libc::DWORD = -11i32 as libc::DWORD;
pub const STD_ERROR_HANDLE: libc::DWORD = -12i32 as libc::DWORD;
+pub const HANDLE_FLAG_INHERIT: libc::DWORD = 0x00000001;
+
#[repr(C)]
#[cfg(target_arch = "x86")]
pub struct WSADATA {
pub fn GetUserProfileDirectoryW(hToken: libc::HANDLE,
lpProfileDir: libc::LPCWSTR,
lpcchSize: *mut libc::DWORD) -> libc::BOOL;
+ pub fn SetHandleInformation(hObject: libc::HANDLE,
+ dwMask: libc::DWORD,
+ dwFlags: libc::DWORD) -> libc::BOOL;
}
// Functions that aren't available on Windows XP, but we still use them and just
SocketAddr::V4(..) => libc::AF_INET,
SocketAddr::V6(..) => libc::AF_INET6,
};
- let socket = unsafe {
- c::WSASocketW(fam, ty, 0, 0 as *mut _, 0,
- c::WSA_FLAG_OVERLAPPED | c::WSA_FLAG_NO_HANDLE_INHERIT)
- };
- match socket {
- INVALID_SOCKET => Err(last_error()),
- n => Ok(Socket(n)),
- }
+ let socket = try!(unsafe {
+ match c::WSASocketW(fam, ty, 0, 0 as *mut _, 0,
+ c::WSA_FLAG_OVERLAPPED) {
+ INVALID_SOCKET => Err(last_error()),
+ n => Ok(Socket(n)),
+ }
+ });
+ try!(socket.set_no_inherit());
+ Ok(socket)
}
pub fn accept(&self, storage: *mut libc::sockaddr,
len: *mut libc::socklen_t) -> io::Result<Socket> {
- match unsafe { libc::accept(self.0, storage, len) } {
- INVALID_SOCKET => Err(last_error()),
- n => Ok(Socket(n)),
- }
+ let socket = try!(unsafe {
+ match libc::accept(self.0, storage, len) {
+ INVALID_SOCKET => Err(last_error()),
+ n => Ok(Socket(n)),
+ }
+ });
+ try!(socket.set_no_inherit());
+ Ok(socket)
}
pub fn duplicate(&self) -> io::Result<Socket> {
- unsafe {
+ let socket = try!(unsafe {
let mut info: c::WSAPROTOCOL_INFO = mem::zeroed();
try!(cvt(c::WSADuplicateSocketW(self.0,
c::GetCurrentProcessId(),
info.iSocketType,
info.iProtocol,
&mut info, 0,
- c::WSA_FLAG_OVERLAPPED |
- c::WSA_FLAG_NO_HANDLE_INHERIT) {
+ c::WSA_FLAG_OVERLAPPED) {
INVALID_SOCKET => Err(last_error()),
n => Ok(Socket(n)),
}
- }
+ });
+ try!(socket.set_no_inherit());
+ Ok(socket)
}
pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
Ok(Some(Duration::new(secs as u64, nsec as u32)))
}
}
+
+ fn set_no_inherit(&self) -> io::Result<()> {
+ sys::cvt(unsafe {
+ c::SetHandleInformation(self.0 as libc::HANDLE,
+ c::HANDLE_FLAG_INHERIT, 0)
+ }).map(|_| ())
+ }
}
impl Drop for Socket {
#[cfg_attr(not(any(windows,
target_os = "android",
target_os = "ios",
+ target_os = "netbsd",
target_os = "openbsd",
target_arch = "aarch64")),
thread_local)]
#[cfg(not(any(windows,
target_os = "android",
target_os = "ios",
+ target_os = "netbsd",
target_os = "openbsd",
target_arch = "aarch64",
no_elf_tls)))]
#[cfg(any(windows,
target_os = "android",
target_os = "ios",
+ target_os = "netbsd",
target_os = "openbsd",
target_arch = "aarch64",
no_elf_tls))]
OsiOS,
OsDragonfly,
OsBitrig,
+ OsNetbsd,
OsOpenbsd,
}
OsFreebsd => "freebsd".fmt(f),
OsDragonfly => "dragonfly".fmt(f),
OsBitrig => "bitrig".fmt(f),
+ OsNetbsd => "netbsd".fmt(f),
OsOpenbsd => "openbsd".fmt(f),
}
}
// Functions dealing with attributes and meta items
+// BitSet
+#![allow(deprecated)]
+
pub use self::StabilityLevel::*;
pub use self::ReprAttr::*;
pub use self::IntType::*;
let display_line_infos = &lines.lines[..display_lines];
let display_line_strings = &line_strings[..display_lines];
+ // Calculate the widest number to format evenly and fix #11715
+ assert!(display_line_infos.len() > 0);
+ let mut max_line_num = display_line_infos[display_line_infos.len() - 1].line_index + 1;
+ let mut digits = 0;
+ while max_line_num > 0 {
+ max_line_num /= 10;
+ digits += 1;
+ }
+
// Print the offending lines
for (line_info, line) in display_line_infos.iter().zip(display_line_strings) {
- try!(write!(&mut err.dst, "{}:{} {}\n",
+ try!(write!(&mut err.dst, "{}:{:>width$} {}\n",
fm.name,
line_info.line_index + 1,
- line));
+ line,
+ width=digits));
}
// If we elided something, put an ellipsis.
None => diag.handler().bug(&msg()),
}
}
+
+#[cfg(test)]
+mod test {
+ use super::{EmitterWriter, highlight_lines, Level};
+ use codemap::{mk_sp, CodeMap, BytePos};
+ use std::sync::{Arc, Mutex};
+ use std::io::{self, Write};
+ use std::str::from_utf8;
+
+ // Diagnostic doesn't align properly in span where line number increases by one digit
+ #[test]
+ fn test_hilight_suggestion_issue_11715() {
+ struct Sink(Arc<Mutex<Vec<u8>>>);
+ impl Write for Sink {
+ fn write(&mut self, data: &[u8]) -> io::Result<usize> {
+ Write::write(&mut *self.0.lock().unwrap(), data)
+ }
+ fn flush(&mut self) -> io::Result<()> { Ok(()) }
+ }
+ let data = Arc::new(Mutex::new(Vec::new()));
+ let mut ew = EmitterWriter::new(Box::new(Sink(data.clone())), None);
+ let cm = CodeMap::new();
+ let content = "abcdefg
+ koksi
+ line3
+ line4
+ cinq
+ line6
+ line7
+ line8
+ line9
+ line10
+ e-lä-vän
+ tolv
+ dreizehn
+ ";
+ let file = cm.new_filemap("dummy.txt".to_string(), content.to_string());
+ for (i, b) in content.bytes().enumerate() {
+ if b == b'\n' {
+ file.next_line(BytePos(i as u32));
+ }
+ }
+ let start = file.lines.borrow()[7];
+ let end = file.lines.borrow()[11];
+ let sp = mk_sp(start, end);
+ let lvl = Level::Error;
+ println!("span_to_lines");
+ let lines = cm.span_to_lines(sp);
+ println!("highlight_lines");
+ highlight_lines(&mut ew, &cm, sp, lvl, lines).unwrap();
+ println!("done");
+ let vec = data.lock().unwrap().clone();
+ let vec: &[u8] = &vec;
+ println!("{}", from_utf8(vec).unwrap());
+ assert_eq!(vec, "dummy.txt: 8 \n\
+ dummy.txt: 9 \n\
+ dummy.txt:10 \n\
+ dummy.txt:11 \n\
+ dummy.txt:12 \n".as_bytes());
+ }
+}
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+pub trait Foo {
+ type Input = usize;
+ fn bar(&self, _: Self::Input) {}
+}
+
+impl Foo for () {}
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+pub struct Foo<Bar=Bar>; //~ ERROR E0128
+pub struct Baz(Foo);
+fn main() {}
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn parse_type(iter: Box<Iterator<Item=&str>+'static>) -> &str { iter.next() }
+//~^ ERROR missing lifetime specifier [E0106]
+//~^^ HELP 2 elided lifetimes
+
+fn parse_type_2(iter: fn(&u8)->&u8) -> &str { iter() }
+//~^ ERROR missing lifetime specifier [E0106]
+//~^^ HELP 0 elided free lifetimes
+
+fn main() {}
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[allow(unused_imports)]
+
+mod foo {
+ use baz::bar;
+ //~^ ERROR import `bar` conflicts with existing submodule
+ mod bar {}
+}
+mod baz { pub mod bar {} }
+
+fn main() {}
}
}
+fn all_fine() {
+ let _f = all_fine;
+}
+
+// issue 26333
+trait Bar {
+ fn method<T: Bar>(&self, x: &T) {
+ x.method(x)
+ }
+}
+
fn main() {}
_x: Port<()>,
}
- impl Drop for foo {
+ impl Drop for foo {
fn drop(&mut self) {}
}
// ignore-windows
// ignore-freebsd
// ignore-openbsd
+// ignore-netbsd
// ignore-bitrig
// compile-flags: -Z parse-only
// Test a very simple custom DST coercion.
-#![feature(core)]
+#![feature(core, rc_weak)]
use std::cell::RefCell;
-use std::rc::Rc;
+use std::rc::{Rc, Weak};
trait Baz {
fn get(&self) -> i32;
let b: Rc<Baz> = a.clone();
assert_eq!(b.get(), 42);
+ let c: Weak<i32> = a.downgrade();
+ let d: Weak<Baz> = c.clone();
+
let _c = b.clone();
let a: Rc<RefCell<i32>> = Rc::new(RefCell::new(42));
let b: Rc<RefCell<Baz>> = a.clone();
assert_eq!(b.borrow().get(), 42);
+ let c: Weak<RefCell<Baz>> = a.downgrade();
}
target_os = "macos",
target_os = "freebsd",
target_os = "dragonfly",
+ target_os = "netbsd",
target_os = "openbsd"))]
mod m {
#[main]
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+const JSVAL_TAG_CLEAR: u32 = 0xFFFFFF80;
+const JSVAL_TYPE_INT32: u8 = 0x01;
+const JSVAL_TYPE_UNDEFINED: u8 = 0x02;
+#[repr(u32)]
+enum ValueTag {
+ JSVAL_TAG_INT32 = JSVAL_TAG_CLEAR | (JSVAL_TYPE_INT32 as u32),
+ JSVAL_TAG_UNDEFINED = JSVAL_TAG_CLEAR | (JSVAL_TYPE_UNDEFINED as u32),
+}
+
+fn main() {
+ let _ = ValueTag::JSVAL_TAG_INT32;
+}
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+const count : usize = 2 as usize;
+fn main() {
+ let larger : [usize; count*2];
+}
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![deny(unused_attributes)]
+
+#[repr(C)]
+#[repr(packed)]
+pub struct Foo;
+
+#[repr(packed)]
+#[repr(C)]
+pub struct Bar;
+
+fn main() { }
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(const_fn)]
+
+// Check that the destructors of simple enums are run on unwinding
+
+use std::sync::atomic::{Ordering, AtomicUsize};
+use std::thread;
+
+static LOG: AtomicUsize = AtomicUsize::new(0);
+
+enum WithDtor { Val }
+impl Drop for WithDtor {
+ fn drop(&mut self) {
+ LOG.store(LOG.load(Ordering::SeqCst)+1,Ordering::SeqCst);
+ }
+}
+
+pub fn main() {
+ thread::spawn(move|| {
+ let _e: WithDtor = WithDtor::Val;
+ panic!("fail");
+ }).join().unwrap_err();
+
+ assert_eq!(LOG.load(Ordering::SeqCst), 1);
+}
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+struct Wrapper<'a, T: ?Sized>(&'a mut i32, T);
+
+impl<'a, T: ?Sized> Drop for Wrapper<'a, T> {
+ fn drop(&mut self) {
+ *self.0 = 432;
+ }
+}
+
+fn main() {
+ let mut x = 0;
+ {
+ let wrapper = Box::new(Wrapper(&mut x, 123));
+ let _: Box<Wrapper<Send>> = wrapper;
+ }
+ assert_eq!(432, x)
+}
p: Option<*const packet<T>>,
}
- impl<T:Send> Drop for send_packet<T> {
+ impl<T:Send> Drop for send_packet<T> {
fn drop(&mut self) {
unsafe {
if self.p != None {
p: Option<*const packet<T>>,
}
- impl<T:Send> Drop for recv_packet<T> {
+ impl<T:Send> Drop for recv_packet<T> {
fn drop(&mut self) {
unsafe {
if self.p != None {
target_os = "macos",
target_os = "freebsd",
target_os = "dragonfly",
+ target_os = "netbsd",
target_os = "openbsd"))]
mod m {
#[cfg(target_arch = "x86")]
// except according to those terms.
// ignore-android needs extra network permissions
-// ignore-openbsd system ulimit (Too many open files)
// ignore-bitrig system ulimit (Too many open files)
+// ignore-netbsd system ulimit (Too many open files)
+// ignore-openbsd system ulimit (Too many open files)
use std::io::prelude::*;
use std::net::{TcpListener, TcpStream};
target_os = "freebsd",
target_os = "dragonfly",
target_os = "bitrig",
+ target_os = "netbsd",
target_os = "openbsd",
target_os = "android"))]
pub fn main() { }
--- /dev/null
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// aux-build:xcrate_associated_type_defaults.rs
+
+extern crate xcrate_associated_type_defaults;
+use xcrate_associated_type_defaults::Foo;
+
+fn main() {
+ ().bar(5);
+}
projects / rust.git / commitdiff