Mercurial > public > mercurial-scm > hg
diff rust/hg-core/src/utils.rs @ 42863:62eabdf91f85
rustfilepatterns: refactor the pattern of removing a prefix from a &[u8]
Differential Revision: https://phab.mercurial-scm.org/D6766
| author | Valentin Gatien-Baron <valentin.gatienbaron@gmail.com> |
|---|---|
| date | Mon, 26 Aug 2019 08:25:01 -0400 |
| parents | ce6797ef6eab |
| children | 3fe40dd6355d |
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--- a/rust/hg-core/src/utils.rs Sun Aug 25 22:52:36 2019 -0400 +++ b/rust/hg-core/src/utils.rs Mon Aug 26 08:25:01 2019 -0400 @@ -40,6 +40,7 @@ fn trim_end(&self) -> &Self; fn trim_start(&self) -> &Self; fn trim(&self) -> &Self; + fn drop_prefix(&self, needle: &Self) -> Option<&Self>; } fn is_not_whitespace(c: &u8) -> bool { @@ -80,4 +81,12 @@ fn trim(&self) -> &[u8] { self.trim_start().trim_end() } + + fn drop_prefix(&self, needle: &Self) -> Option<&Self> { + if self.starts_with(needle) { + Some(&self[needle.len()..]) + } else { + None + } + } }