// SPDX-License-Identifier: GPL-2.0 //! Static assert. /// Static assert (i.e. compile-time assert).////// Similar to C11 [`_Static_assert`] and C++11 [`static_assert`].////// An optional panic message can be supplied after the expression./// Currently only a string literal without formatting is supported/// due to constness limitations of the [`assert!`] macro.////// The feature may be added to Rust in the future: see [RFC 2790].////// [`_Static_assert`]: https://en.cppreference.com/w/c/language/_Static_assert/// [`static_assert`]: https://en.cppreference.com/w/cpp/language/static_assert/// [RFC 2790]: https://github.com/rust-lang/rfcs/issues/2790////// # Examples////// ```/// static_assert!(42 > 24);/// static_assert!(core::mem::size_of::<u8>() == 1);////// const X: &[u8] = b"bar";/// static_assert!(X[1] == b'a');////// const fn f(x: i32) -> i32 {///     x + 2/// }/// static_assert!(f(40) == 42);/// static_assert!(f(40) == 42, "f(x) must add 2 to the given input.");/// ```#[macro_export]macro_rules! static_assert {    ($condition:expr $(,$arg:literal)?) => {        const _: () = ::core::assert!($condition $(,$arg)?);    };}