| /// A simple static assertion macro. The first argument should be a unique | |
| /// ALL_CAPS identifier that describes the condition. | |
| #[macro_export] | |
| #[allow_internal_unstable] | |
| macro_rules! static_assert { | |
| ($name:ident: $test:expr) => { | |
| // Use the bool to access an array such that if the bool is false, the access | |
| // is out-of-bounds. | |
| #[allow(dead_code)] | |
| static $name: () = [()][!($test: bool) as usize]; | |
| } | |
| } |