/// A simple static assertion macro. The first argument should be a unique
/// ALL_CAPS identifier that describes the condition.
#[macro_export]
#[allow_internal_unstable(type_ascription)]
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];
}
}