1 /// A simple static assertion macro. The first argument should be a unique
2 /// ALL_CAPS identifier that describes the condition.
4 #[cfg_attr(stage0, allow_internal_unstable)]
5 #[cfg_attr(not(stage0), allow_internal_unstable(type_ascription))]
6 macro_rules! static_assert {
7 ($name:ident: $test:expr) => {
8 // Use the bool to access an array such that if the bool is false, the access
11 static $name: () = [()][!($test: bool) as usize];