Expand description
The string Pattern API.
The Pattern API provides a generic mechanism for using different pattern types when searching through a string.
For more details, see the traits Pattern, Searcher,
ReverseSearcher, and DoubleEndedSearcher.
Although this API is unstable, it is exposed via stable APIs on the
str type.
Examples
Pattern is implemented in the stable API for
&str, char, slices of char, and functions and closures
implementing FnMut(char) -> bool.
let s = "Can you find a needle in a haystack?";
// &str pattern
assert_eq!(s.find("you"), Some(4));
// char pattern
assert_eq!(s.find('n'), Some(2));
// array of chars pattern
assert_eq!(s.find(&['a', 'e', 'i', 'o', 'u']), Some(1));
// slice of chars pattern
assert_eq!(s.find(&['a', 'e', 'i', 'o', 'u'][..]), Some(1));
// closure pattern
assert_eq!(s.find(|c: char| c.is_ascii_punctuation()), Some(35));RunStructs
Associated type for <&[char; N] as Pattern<'a>>::Searcher.
Associated type for <[char; N] as Pattern<'a>>::Searcher.
Associated type for <F as Pattern<'a>>::Searcher.
Associated type for <char as Pattern<'a>>::Searcher.
Associated type for <&[char] as Pattern<'a>>::Searcher.
Associated type for <&str as Pattern<'a>>::Searcher.
Enums
Result of calling Searcher::next() or ReverseSearcher::next_back().
Traits
A marker trait to express that a ReverseSearcher
can be used for a DoubleEndedIterator implementation.
A string pattern.
A reverse searcher for a string pattern.
A searcher for a string pattern.