Auto merge of #32977 - alexcrichton:ignore-panics, r=brson
std: Change String::truncate to panic less
The `Vec::truncate` method does not panic if the length argument is greater than
the vector's current length, but `String::truncate` will indeed panic. This
semantic difference can be a bit jarring (e.g. #32717), and after some
discussion the libs team concluded that although this can technically be a
breaking change it is almost undoubtedly not so in practice.
This commit changes the semantics of `String::truncate` to be a noop if
`new_len` is greater than the length of the current string.
Auto merge of #32952 - eddyb:mir-debuginfo-2, r=michaelwoerister
Get all (but one) of debuginfo tests to pass with MIR codegen.
I didn't get much feedback in #31005 so I went ahead and implemented something simple.
Closes #31005, as MIR debuginfo should work now for most usecases.
The `no-debug-attribute` test no longer assumes variables are in scope of `return`.
We might also want to revisit that in #32949, but the test is more reliable now either way.
In order to get one last function in the `associated-type` test pass, this PR also fixes #32790.
Auto merge of #32875 - jseyfried:1422_implementation, r=nikomatsakis
Implement `pub(restricted)` privacy (RFC 1422)
This implements `pub(restricted)` privacy from RFC 1422 (cc #32409) behind a feature gate.
`pub(restricted)` paths currently cannot use re-exported modules both for simplicity of implementation and for future compatibility with RFC 1560 (cf #31783).
Auto merge of #32779 - michaelwoerister:partitioning, r=nikomatsakis
Add initial version of codegen unit partitioning for incremental compilation.
The task of the partitioning module is to take the complete set of translation items of a crate and produce a set of codegen units from it, where a codegen unit is a named set of (translation-item, linkage) pairs. That is, this module decides which translation item appears in which codegen units with which linkage.
This version only handles the case of partitioning for incremental compilation, not the regular N-codegen units case. In the future the regular case should be handled too, maybe even doing a bit more analysis to intelligently figure out a good partitioning.
One thing that could be improved is the syntax of the codegen unit tests. Right now they still use the compile-fail error specification infrastructure, so everything has to be on one line. Would be nice to be able to format things in a more readable way.
Rollup merge of #32935 - pierzchalski:restore_trait_impl_docs, r=alexcrichton
Restore trait impl docs
Currently, documentation on methods in trait implementations doesn't get rendered. This changes that; trait implementations have all documentation associated with impl items displayed (documentation from the trait definition is ignored).
Rollup merge of #32926 - caipre:rustbuild-verify-download, r=alexcrichton
rustbuild: Verify sha256 of downloaded tarballs
Here's a quick first pass at this.
I don't use Python often enough to claim that this is totally Pythonic. I've left off some (almost certainly unnecessary) error handling regarding opening and processing files. The whole tarball is read into memory to calculate the hash, but the file isn't *so* large so that should be fine. I don't care for the output from `raise RuntimeError`, but that's how `run()` does it so I'm following precedent.
Tested by manually changing the value of `expected`, and by modifying the tarball then forcing `rustc_out_of_date()`. Both cases tripped the error.
Rollup merge of #32923 - jseyfried:fix_hygiene, r=nrc
Fix macro hygiene bug
This fixes #32922 (EDIT: and fixes #31856), macro hygiene bugs.
It is a [breaking-change]. For example, the following would break:
```rust
fn main() {
let x = true;
macro_rules! foo { () => {
let x = 0;
macro_rules! bar { () => {x} }
let _: bool = bar!();
//^ `bar!()` used to resolve the first `x` (a bool),
//| but will now resolve to the second x (an i32).
}}
foo! {};
}
```
Auto merge of #32338 - lukaspustina:doc-std-process, r=alexcrichton
Extends rustdoc on how to caputure output
- The documentation is quite about how to caputure a process' output when using
` std::process::Child::wait_with_output()`.
- This PR adds an example for this particular use case.
Auto merge of #32972 - alexcrichton:cargotest, r=brson
cargotest: Put output in build directory
Right now cargotest uses `TempDir` to place output into the system temp
directory, but unfortunately this means that if the process is interrupted then
it'll leak the directory and that'll never get cleaned up. One of our bots
filled up its disk space and there were 20 cargotest directories lying around so
seems prudent to clean them up!
By putting the output in the build directory it should ensure that we don't leak
too many extra builds.
Alex Crichton [Thu, 14 Apr 2016 23:56:59 +0000 (16:56 -0700)]
std: Change String::truncate to panic less
The `Vec::truncate` method does not panic if the length argument is greater than
the vector's current length, but `String::truncate` will indeed panic. This
semantic difference can be a bit jarring (e.g. #32717), and after some
discussion the libs team concluded that although this can technically be a
breaking change it is almost undoubtedly not so in practice.
This commit changes the semantics of `String::truncate` to be a noop if
`new_len` is greater than the length of the current string.
Alex Crichton [Thu, 14 Apr 2016 21:27:51 +0000 (14:27 -0700)]
cargotest: Put output in build directory
Right now cargotest uses `TempDir` to place output into the system temp
directory, but unfortunately this means that if the process is interrupted then
it'll leak the directory and that'll never get cleaned up. One of our bots
filled up its disk space and there were 20 cargotest directories lying around so
seems prudent to clean them up!
By putting the output in the build directory it should ensure that we don't leak
too many extra builds.
Auto merge of #32895 - alexcrichton:rustbuild-beta, r=brson
rustbuild: Fix handling of the bootstrap key
Bring the calculation logic in line with the makefiles and also set the
RUSTC_BOOTSTRAP_KEY environment variable to enable the bootstrap on the stable
compiler.
Auto merge of #32693 - kamalmarhubi:binary_search_by_key, r=alexcrichton
collections: Add slice::binary_search_by_key
This method adds to the family of `_by_key` methods, and is the
counterpart of `slice::sort_by_key`. It was mentioned on #30423 but
was not implemented at that time.
Add tests against weird provided/required method behaviour
In `test/rustdoc/manual_impl.rs` there are now three structs:
* S1 implements and documents required method `a_method`.
* S2 implements and documents `a_method` as well as provided
method `b_method`.
* S3 implements `a_method` and `b_method`, but only documents
`b_method`.
For a struct, we want the rendered trait impls to include documentation
if and only if it appears on the trait implementation itself
(since users can just go to the trait definition for anything not
covered in the impl docs). This means we expect:
* S1, S2, and S3 to all include top-level trait impl docs.
* S1, S2, and S3 to exclude all trait definition docs.
* S1 to show impl docs for `a_method`.
* S2 to show impl docs for `a_method` and `b_method`.
* S3 to show impl docs for `b_method`.
Steve Klabnik [Thu, 14 Apr 2016 18:49:10 +0000 (14:49 -0400)]
Rollup merge of #32885 - rkjnsn:patch-2, r=alexcrichton
Fix conflicting link identifiers
Caused "Errors for non-exhaustive match patterns now list up to 3 missing variants while also indicating the total number of missing variants if more than 3." to link to "libsyntax: Restrict where non-inline modules can appear (fixes #29765)"
Steve Klabnik [Thu, 14 Apr 2016 18:49:09 +0000 (14:49 -0400)]
Rollup merge of #32865 - caipre:llvm-ninja, r=alexcrichton
Add rustbuild option to use Ninja for LLVM build
This change adds support for a `ninja` option in the `[llvm]` section of rustbuild's `config.toml`. When `true`, the option enables use of the Ninja build tool. Note that this change does not add support for Ninja to the old makefile based build system.
Steve Klabnik [Thu, 14 Apr 2016 18:49:09 +0000 (14:49 -0400)]
Rollup merge of #32856 - cardoe:target-spec-path, r=alexcrichton
librustc_back: fix incorrect comment about RUST_TARGET_PATH
The path `/etc/rustc/` is not the default last entry in
RUST_TARGET_PATH. This was in RFC131 but was never implemented in rustc
so it was removed as part of #31117 and rust-lang/rfcs#1473.
Auto merge of #32877 - oli-obk:const_err_multi, r=arielb1
don't report errors in constants at every use site
partially fixes #32842
r? @arielb1
cc @retep998
I chose this way of implementing it, because the alternative (checking if the error span is inside the constant's expressions's span) would get confusing when combined with expression generating macros.
A next step would be to re-enable the re-reporting of errors if the original erroneous constant is in another crate.
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