#![feature(allow_internal_unstable)] // Macro to help ensure CONST_ERR lint errors // are not silenced in external macros. // https://github.com/rust-lang/rust/issues/65300 #[macro_export] #[allow_internal_unstable(type_ascription)] macro_rules! static_assert { ($test:expr) => { #[allow(dead_code)] const _: () = [()][!($test: bool) as usize]; } }