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Factor out more generic macro to run a macro on each tuple type

This commit is contained in:
Josh Triplett 2015-04-25 17:03:05 -07:00
parent c6163dac40
commit 6f2db9b631
1 changed files with 16 additions and 10 deletions
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26
src/traits.rs
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@ -463,6 +463,21 @@ bounded_impl!(i64, i64::MIN, i64::MAX);
bounded_impl!(f32, f32::MIN, f32::MAX); bounded_impl!(f32, f32::MIN, f32::MAX);
bounded_impl!(f64, f64::MIN, f64::MAX); bounded_impl!(f64, f64::MIN, f64::MAX);
macro_rules! for_each_tuple_ {
( $m:ident !! ) => (
$m! { }
);
( $m:ident !! $h:ident, $($t:ident,)* ) => (
$m! { $h $($t)* }
for_each_tuple_! { $m !! $($t,)* }
);
}
macro_rules! for_each_tuple {
( $m:ident ) => (
for_each_tuple_! { $m !! A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, }
);
}
macro_rules! bounded_tuple { macro_rules! bounded_tuple {
( $($name:ident)* ) => ( ( $($name:ident)* ) => (
impl<$($name: Bounded,)*> Bounded for ($($name,)*) { impl<$($name: Bounded,)*> Bounded for ($($name,)*) {
@ -475,17 +490,8 @@ macro_rules! bounded_tuple {
} }
); );
} }
macro_rules! bounded_tuples {
() => (
bounded_tuple! { }
);
( $h:ident, $($t:ident,)* ) => (
bounded_tuple! { $h $($t)* }
bounded_tuples! { $($t,)* }
);
}
bounded_tuples! { A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, } for_each_tuple!(bounded_tuple);
/// Saturating math operations /// Saturating math operations
pub trait Saturating { pub trait Saturating {