Struct core::str::pattern::CharSearcher

pub struct CharSearcher<'a> {
    haystack: &'a str,
    finger: usize,
    finger_back: usize,
    needle: char,
    utf8_size: usize,
    utf8_encoded: [u8; 4],
}

🔬This is a nightly-only experimental API. (pattern #27721)

Associated type for <char as Pattern<'a>>::Searcher.

Fields

haystack: &'a str

🔬This is a nightly-only experimental API. (pattern #27721)

finger: usize

🔬This is a nightly-only experimental API. (pattern #27721)

finger is the current byte index of the forward search. Imagine that it exists before the byte at its index, i.e. haystack[finger] is the first byte of the slice we must inspect during forward searching

finger_back: usize

🔬This is a nightly-only experimental API. (pattern #27721)

finger_back is the current byte index of the reverse search. Imagine that it exists after the byte at its index, i.e. haystack[finger_back - 1] is the last byte of the slice we must inspect during forward searching (and thus the first byte to be inspected when calling next_back()).

needle: char

🔬This is a nightly-only experimental API. (pattern #27721)

The character being searched for

utf8_size: usize

🔬This is a nightly-only experimental API. (pattern #27721)

The number of bytes needle takes up when encoded in utf8.

utf8_encoded: [u8; 4]

🔬This is a nightly-only experimental API. (pattern #27721)

A utf8 encoded copy of the needle

Trait Implementations

impl<'a> Clone for CharSearcher<'a>

fn clone(&self) -> CharSearcher<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for CharSearcher<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> ReverseSearcher<'a> for CharSearcher<'a>

fn next_back(&mut self) -> SearchStep

🔬This is a nightly-only experimental API. (pattern #27721)

Performs the next search step starting from the back.

fn next_match_back(&mut self) -> Option<(usize, usize)>

🔬This is a nightly-only experimental API. (pattern #27721)

Finds the next Match result. See next_back().

fn next_reject_back(&mut self) -> Option<(usize, usize)>

🔬This is a nightly-only experimental API. (pattern #27721)

Finds the next Reject result. See next_back().

impl<'a> Searcher<'a> for CharSearcher<'a>

fn haystack(&self) -> &'a str

🔬This is a nightly-only experimental API. (pattern #27721)

Getter for the underlying string to be searched in

fn next(&mut self) -> SearchStep

🔬This is a nightly-only experimental API. (pattern #27721)

Performs the next search step starting from the front.

fn next_match(&mut self) -> Option<(usize, usize)>

🔬This is a nightly-only experimental API. (pattern #27721)

Finds the next Match result. See next().

fn next_reject(&mut self) -> Option<(usize, usize)>

🔬This is a nightly-only experimental API. (pattern #27721)

Finds the next Reject result. See next() and next_match().

impl<'a> DoubleEndedSearcher<'a> for CharSearcher<'a>