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Group Pattern::strip_* method together #73336

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Jun 15, 2020
+10 −10
Merged

Group Pattern::strip_* method together #73336

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20 changes: 10 additions & 10 deletions src/libcore/str/pattern.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -69,7 +69,7 @@ use crate::slice::memchr;
/// |--------------------------|-------------------------------------------|
/// | `&str` | is substring |
/// | `char` | is contained in string |
/// | `&[char] | any char in slice is contained in string |
/// | `&[char]` | any char in slice is contained in string |
/// | `F: FnMut(char) -> bool` | `F` returns `true` for a char in string |
/// | `&&str` | is substring |
/// | `&String` | is substring |
Expand Down Expand Up @@ -117,6 +117,15 @@ pub trait Pattern<'a>: Sized {
matches!(self.into_searcher(haystack).next(), SearchStep::Match(0, _))
}

/// Checks whether the pattern matches at the back of the haystack
#[inline]
fn is_suffix_of(self, haystack: &'a str) -> bool
where
Self::Searcher: ReverseSearcher<'a>,
{
matches!(self.into_searcher(haystack).next_back(), SearchStep::Match(_, j) if haystack.len() == j)
}

/// Removes the pattern from the front of haystack, if it matches.
#[inline]
fn strip_prefix_of(self, haystack: &'a str) -> Option<&'a str> {
Expand All @@ -133,15 +142,6 @@ pub trait Pattern<'a>: Sized {
}
}

/// Checks whether the pattern matches at the back of the haystack
#[inline]
fn is_suffix_of(self, haystack: &'a str) -> bool
where
Self::Searcher: ReverseSearcher<'a>,
{
matches!(self.into_searcher(haystack).next_back(), SearchStep::Match(_, j) if haystack.len() == j)
}

/// Removes the pattern from the back of haystack, if it matches.
#[inline]
fn strip_suffix_of(self, haystack: &'a str) -> Option<&'a str>
Expand Down