1 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 /// A simple static assertion macro. The first argument should be a unique
12 /// ALL_CAPS identifier that describes the condition.
14 #[allow_internal_unstable]
15 macro_rules! static_assert {
16 ($name:ident: $test:expr) => {
17 // Use the bool to access an array such that if the bool is false, the access
20 static $name: () = [()][!($test: bool) as usize];