* `staged_api` - Allows usage of stability markers and `#![staged_api]` in a crate
+* `static_assert` - The `#[static_assert]` functionality is experimental and
+ unstable. The attribute can be attached to a `static` of
+ type `bool` and the compiler will error if the `bool` is
+ `false` at compile time. This version of this functionality
+ is unintuitive and suboptimal.
+
* `start` - Allows use of the `#[start]` attribute, which changes the entry point
into a Rust program. This capabiilty, especially the signature for the
annotated function, is subject to change.
// Allows the use of rustc_* attributes; RFC 572
("rustc_attrs", "1.0.0", Active),
+
+ // Allows the use of `static_assert`
+ ("static_assert", "1.0.0", Active),
];
// (changing above list without updating src/doc/reference.md makes @cmr sad)
("no_split_stack", Whitelisted),
("no_stack_check", Whitelisted),
("packed", Whitelisted),
- ("static_assert", Whitelisted),
+ ("static_assert", Gated("static_assert",
+ "`#[static_assert]` is an experimental feature, and has a poor API")),
("no_debug", Whitelisted),
("omit_gdb_pretty_printer_section", Whitelisted),
("unsafe_no_drop_flag", Gated("unsafe_no_drop_flag",
|ctx, krate| visit::walk_crate(&mut PostExpansionVisitor { context: ctx },
krate))
}
-
// ignore-android
-#![feature(asm)]
+#![feature(asm, rustc_attrs)]
#![allow(dead_code, non_upper_case_globals)]
#[cfg(any(target_arch = "x86",
target_arch = "x86_64"))]
-pub fn main() {
+#[rustc_error]
+pub fn main() { //~ ERROR compilation successful
// assignment not dead
let mut x: isize = 0;
unsafe {
}
assert_eq!(x, 13);
}
-
-// At least one error is needed so that compilation fails
-#[static_assert]
-static b: bool = false; //~ ERROR static assertion failed
--- /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.
+
+#[static_assert] //~ ERROR `#[static_assert]` is an experimental feature
+static X: bool = true;
+
+fn main() {}
// option. This file may not be copied, modified, or distributed
// except according to those terms.
+#![feature(rustc_attrs)]
#![allow(dead_code)]
// Matching against NaN should result in a warning
use std::f64::NAN;
-fn main() {
+#[rustc_error]
+fn main() { //~ ERROR compilation successful
let x = NAN;
match x {
NAN => {},
};
//~^^^ WARNING unmatchable NaN in pattern, use the is_nan method in a guard instead
}
-
-// At least one error is needed so that compilation fails
-#[static_assert]
-static B: bool = false; //~ ERROR static assertion failed
// option. This file may not be copied, modified, or distributed
// except according to those terms.
+#![feature(static_assert)]
#![allow(dead_code)]
#[static_assert]
// option. This file may not be copied, modified, or distributed
// except according to those terms.
+#![feature(static_assert)]
#![allow(dead_code)]
#[static_assert]
// option. This file may not be copied, modified, or distributed
// except according to those terms.
+#![feature(static_assert)]
#![allow(dead_code)]
#[static_assert]
// option. This file may not be copied, modified, or distributed
// except according to those terms.
+#![feature(static_assert)]
+
#[static_assert]
static b: bool = true;