byte_pattern: share the TwoWaySearcher between byte and str
#135931
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rustbot
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folkertdev
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Jan 23, 2025
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| SearchStep::Reject(a, mut b) => { | ||
| byte_pattern::SearchStep::Reject(a, mut b) => { | ||
| // skip to next char boundary | ||
| while !self.haystack.is_char_boundary(b) { | ||
| b += 1; | ||
| } | ||
| searcher.position = cmp::max(b, searcher.position); | ||
| SearchStep::Reject(a, b) | ||
| } | ||
| otherwise => otherwise, | ||
| byte_pattern::SearchStep::Match(a, b) => SearchStep::Match(a, b), | ||
| byte_pattern::SearchStep::Done => SearchStep::Done, |
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I duplicated SearchStep because it is a public type and its documentation refers to the Searcher trait. The byte_pattern module will have it's own Searcher trait (or ByteSearcher maybe) and so that documentation would be misleading one way or the other.
library/core/src/str/pattern.rs
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| if let Some(result) = simd_contains(self, haystack) { | ||
| if let Some(result) = simd_contains(self.as_bytes(), haystack.as_bytes()) { |
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this function just takes a slice of bytes now. From what I can see the implementation does not rely on the input being UTF8 at all.
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tracking issue: #134149
An attempt to break up #134350 into more manageable pieces.
From what I can see, the
TwoWaySearcherimplementation does not have special logic for UTF8 boundaries, so it should work just as well on any&[u8]. So this PR just moves theTwoWaySearcherimplementation toslice/byte_pattern.rs, and then uses it fromstr/pattern.rs. No functional changes, no additional API surface.r? @BurntSushi