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| author | Jacob Pratt <jacob@jhpratt.dev> | 2021-04-01 01:55:03 -0400 |
|---|---|---|
| committer | Jacob Pratt <jacob@jhpratt.dev> | 2021-05-26 00:12:06 -0400 |
| commit | 641c8cd87595016d08df39e7bd9ce795682a5b0d (patch) | |
| tree | f35dda21684a605946ab42d483033ace0a2bd9c1 | |
| parent | 47a90f452050d4ea484206447babb07dd33c21d5 (diff) | |
| download | rust-641c8cd87595016d08df39e7bd9ce795682a5b0d.tar.gz rust-641c8cd87595016d08df39e7bd9ce795682a5b0d.zip | |
Limit `TrustedLen` impls to core types
| -rw-r--r-- | library/core/src/iter/range.rs | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/library/core/src/iter/range.rs b/library/core/src/iter/range.rs index 8d0b2b9f55c..2bd0380bad6 100644 --- a/library/core/src/iter/range.rs +++ b/library/core/src/iter/range.rs @@ -655,8 +655,13 @@ impl<A: Step> DoubleEndedIterator for ops::Range<A> { } } -#[unstable(feature = "trusted_len", issue = "37572")] -unsafe impl<A: Step> TrustedLen for ops::Range<A> {} +macro_rules! impl_trusted_len_for_range { + ($($type:ty)*) => {$( + #[unstable(feature = "trusted_len", issue = "37572")] + unsafe impl TrustedLen for ops::Range<$type> {} + )*} +} +impl_trusted_len_for_range![char i8 i16 i32 i64 i128 isize u8 u16 u32 u64 u128 usize]; #[stable(feature = "fused", since = "1.26.0")] impl<A: Step> FusedIterator for ops::Range<A> {} @@ -687,8 +692,13 @@ impl<A: Step> Iterator for ops::RangeFrom<A> { #[stable(feature = "fused", since = "1.26.0")] impl<A: Step> FusedIterator for ops::RangeFrom<A> {} -#[unstable(feature = "trusted_len", issue = "37572")] -unsafe impl<A: Step> TrustedLen for ops::RangeFrom<A> {} +macro_rules! impl_trusted_len_for_range_from { + ($($type:ty)*) => {$( + #[unstable(feature = "trusted_len", issue = "37572")] + unsafe impl TrustedLen for ops::RangeFrom<$type> {} + )*} +} +impl_trusted_len_for_range_from![char i8 i16 i32 i64 i128 isize u8 u16 u32 u64 u128 usize]; #[stable(feature = "inclusive_range", since = "1.26.0")] impl<A: Step> Iterator for ops::RangeInclusive<A> { @@ -899,8 +909,13 @@ impl<A: Step> DoubleEndedIterator for ops::RangeInclusive<A> { } } -#[unstable(feature = "trusted_len", issue = "37572")] -unsafe impl<A: Step> TrustedLen for ops::RangeInclusive<A> {} +macro_rules! impl_trusted_len_for_range_inclusive { + ($($type:ty)*) => {$( + #[unstable(feature = "trusted_len", issue = "37572")] + unsafe impl TrustedLen for ops::RangeInclusive<$type> {} + )*} +} +impl_trusted_len_for_range_inclusive![char i8 i16 i32 i64 i128 isize u8 u16 u32 u64 u128 usize]; #[stable(feature = "fused", since = "1.26.0")] impl<A: Step> FusedIterator for ops::RangeInclusive<A> {} |