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| author | okaneco <47607823+okaneco@users.noreply.github.com> | 2023-10-26 20:23:56 -0400 |
|---|---|---|
| committer | okaneco <47607823+okaneco@users.noreply.github.com> | 2023-10-26 21:48:36 -0400 |
| commit | 465ffc9ca781af9ac0a89643c9971ac807da5766 (patch) | |
| tree | 4de6c72d8584d65aa4d27c02c900f3251bca64e5 /library/core/src/char | |
| parent | 8396efecf7d30ca9f7edcf76aba2ea388300f6ab (diff) | |
| download | rust-465ffc9ca781af9ac0a89643c9971ac807da5766.tar.gz rust-465ffc9ca781af9ac0a89643c9971ac807da5766.zip | |
Refactor some `char`, `u8` ascii functions to be branchless
Decompose singular `matches!` with or-patterns to individual `matches!` statements to enable branchless code output. The following functions were changed: - `is_ascii_alphanumeric` - `is_ascii_hexdigit` - `is_ascii_punctuation` Add codegen tests Co-authored-by: George Bateman <george.bateman16@gmail.com> Co-authored-by: scottmcm <scottmcm@users.noreply.github.com>
Diffstat (limited to 'library/core/src/char')
| -rw-r--r-- | library/core/src/char/methods.rs | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/library/core/src/char/methods.rs b/library/core/src/char/methods.rs index 4ac956e7b76..7ce33bdd411 100644 --- a/library/core/src/char/methods.rs +++ b/library/core/src/char/methods.rs @@ -1450,7 +1450,7 @@ impl char { #[rustc_const_stable(feature = "const_ascii_ctype_on_intrinsics", since = "1.47.0")] #[inline] pub const fn is_ascii_alphanumeric(&self) -> bool { - matches!(*self, '0'..='9' | 'A'..='Z' | 'a'..='z') + matches!(*self, '0'..='9') | matches!(*self, 'A'..='Z') | matches!(*self, 'a'..='z') } /// Checks if the value is an ASCII decimal digit: @@ -1553,7 +1553,7 @@ impl char { #[rustc_const_stable(feature = "const_ascii_ctype_on_intrinsics", since = "1.47.0")] #[inline] pub const fn is_ascii_hexdigit(&self) -> bool { - matches!(*self, '0'..='9' | 'A'..='F' | 'a'..='f') + matches!(*self, '0'..='9') | matches!(*self, 'A'..='F') | matches!(*self, 'a'..='f') } /// Checks if the value is an ASCII punctuation character: @@ -1591,7 +1591,10 @@ impl char { #[rustc_const_stable(feature = "const_ascii_ctype_on_intrinsics", since = "1.47.0")] #[inline] pub const fn is_ascii_punctuation(&self) -> bool { - matches!(*self, '!'..='/' | ':'..='@' | '['..='`' | '{'..='~') + matches!(*self, '!'..='/') + | matches!(*self, ':'..='@') + | matches!(*self, '['..='`') + | matches!(*self, '{'..='~') } /// Checks if the value is an ASCII graphic character: |