20 lines
608 B
Rust
20 lines
608 B
Rust
/// A simple static assertion macro.
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#[macro_export]
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#[allow_internal_unstable(type_ascription)]
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macro_rules! static_assert {
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($test:expr) => {
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// Use the bool to access an array such that if the bool is false, the access
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// is out-of-bounds.
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#[allow(dead_code)]
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const _: () = [()][!($test: bool) as usize];
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}
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}
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/// Type size assertion. The first argument is a type and the second argument is its expected size.
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#[macro_export]
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macro_rules! static_assert_size {
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($ty:ty, $size:expr) => {
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const _: [(); $size] = [(); ::std::mem::size_of::<$ty>()];
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}
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}
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