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| author | Yuki Okushi <huyuumi.dev@gmail.com> | 2020-12-17 11:44:12 +0900 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-12-17 11:44:12 +0900 |
| commit | e4735ddec01551d3f7b3d4d76527d2d0bb70e242 (patch) | |
| tree | 22abf9c91374ce7d9d736e50bb4323dfe8676757 | |
| parent | 5ce62da43bd66b03b9550d31fb180915f40cd473 (diff) | |
| parent | f365de353ad3d48b5e9269ebc373f82d5aeb19d0 (diff) | |
| download | rust-e4735ddec01551d3f7b3d4d76527d2d0bb70e242.tar.gz | |
Rollup merge of #80097 - SimonSapin:popcount, r=m-ou-se
Add `popcount` and `popcnt` as doc aliases for `count_ones` methods.
Integer types have a `count_ones` method that end up calling `intrinsics::ctpop`. On some architectures, that intrinsic is translated as a corresponding CPU instruction know as "popcount" or "popcnt".
This PR makes it so that searching for those names in rustdoc shows those methods.
CC https://blog.rust-lang.org/2020/11/19/Rust-1.48.html#adding-search-aliases
| -rw-r--r-- | library/core/src/num/int_macros.rs | 2 | ||||
| -rw-r--r-- | library/core/src/num/uint_macros.rs | 2 | ||||
| -rw-r--r-- | library/core/src/num/wrapping.rs | 2 |
3 files changed, 6 insertions, 0 deletions
diff --git a/library/core/src/num/int_macros.rs b/library/core/src/num/int_macros.rs index 4fa48427ec6..2cde5d9995b 100644 --- a/library/core/src/num/int_macros.rs +++ b/library/core/src/num/int_macros.rs @@ -92,6 +92,8 @@ $EndFeature, " "), #[stable(feature = "rust1", since = "1.0.0")] #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")] + #[doc(alias = "popcount")] + #[doc(alias = "popcnt")] #[inline] pub const fn count_ones(self) -> u32 { (self as $UnsignedT).count_ones() } } diff --git a/library/core/src/num/uint_macros.rs b/library/core/src/num/uint_macros.rs index 390c1b7e9e8..ae8fc18a838 100644 --- a/library/core/src/num/uint_macros.rs +++ b/library/core/src/num/uint_macros.rs @@ -90,6 +90,8 @@ assert_eq!(n.count_ones(), 3);", $EndFeature, " ```"), #[stable(feature = "rust1", since = "1.0.0")] #[rustc_const_stable(feature = "const_math", since = "1.32.0")] + #[doc(alias = "popcount")] + #[doc(alias = "popcnt")] #[inline] pub const fn count_ones(self) -> u32 { intrinsics::ctpop(self as $ActualT) as u32 diff --git a/library/core/src/num/wrapping.rs b/library/core/src/num/wrapping.rs index 5324dfdeddd..77c9a93008c 100644 --- a/library/core/src/num/wrapping.rs +++ b/library/core/src/num/wrapping.rs @@ -453,6 +453,8 @@ let n = Wrapping(0b01001100", stringify!($t), "); assert_eq!(n.count_ones(), 3); ```"), #[inline] + #[doc(alias = "popcount")] + #[doc(alias = "popcnt")] #[unstable(feature = "wrapping_int_impl", issue = "32463")] pub const fn count_ones(self) -> u32 { self.0.count_ones() |