Struct grep_matcher::NoCaptures

pub struct NoCaptures(_);

NoCaptures provides an always-empty implementation of the Captures trait.

This type is useful for implementations of Matcher that don't support capturing groups.

Methods

impl NoCaptures

pub fn new() -> NoCaptures

Create an empty set of capturing groups.

Trait Implementations

impl Captures for NoCaptures

fn len(&self) -> usize

Return the total number of capturing groups. This includes capturing groups that have not matched anything.

fn get(&self, _: usize) -> Option<Match>

Return the capturing group match at the given index. If no match of that capturing group exists, then this returns None.

fn is_empty(&self) -> bool

Returns true if and only if these captures are empty. This occurs when len is 0.

fn interpolate<F>(
    &self,
    name_to_index: F,
    haystack: &[u8],
    replacement: &[u8],
    dst: &mut Vec<u8>
) where
    F: FnMut(&str) -> Option<usize>, 

Expands all instances of $name in replacement to the corresponding capture group name, and writes them to the dst buffer given.

impl Clone for NoCaptures

fn clone(&self) -> NoCaptures

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for NoCaptures

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

Formats the value using the given formatter.