39 lines
1.2 KiB
Rust
39 lines
1.2 KiB
Rust
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macro_rules! impl_display {
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(for $ty:ty => $(|$selfty:pat_param|)? $fmt:literal $(, $($param:expr),+)? $(,)?) => {
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impl ::core::fmt::Display for $ty {
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fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
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$(let $selfty = self;)?
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write!(f, $fmt, $($param),*)
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}
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}
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};
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(for $ty:ty => $str:literal) => {
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impl ::core::fmt::Display for $ty {
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fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
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f.write_str($str)
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}
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}
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};
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(for $ty:ty => match {$(
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$bind:pat => $fmt:literal $(,$($param:expr),* $(,)?)?;
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)*}) => {
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impl ::core::fmt::Display for $ty {
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fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
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match self {
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$(
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$bind => write!(f, $fmt, $($($param),*)?)
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),*
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}
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}
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}
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}
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}
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macro_rules! static_assert_eq(($l:expr, $r:expr $(,)?) => {
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const _: [(); ($l != $r) as usize] = [];
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});
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pub(crate) use {impl_display, static_assert_eq};
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