Stdlib/std.regex/Captures

Captures

struct Captures

Represents the capture groups for a single match.

Capture groups refer to parts of a regex enclosed in parentheses. They can be optionally named. The purpose of capture groups is to be able to reference different parts of a match based on the original pattern.

Methods

pub fn len(self): int

Return length of Captures.

use std.regex.Regex;

let re = try! Regex.new("(\\d{4})-(\\d{2})-(\\d{2})");
let caps = re.captures("2010-03-14")!;
assert_eq caps.len(), 4;

pub fn get(self, i: int): Match?

Get item from Captures by index, return a Match? type.

use std.regex.Regex;

let re = try! Regex.new("(\\d{4})-(\\d{2})-(\\d{2})");
let caps = re.captures("2010-03-14")!;
assert_eq caps.get(0)?.text, "2010-03-14";
assert_eq caps.get(0)?.start, 0;
assert_eq caps.get(0)?.end, 10;

assert_eq caps.get(1)?.text, "2010";
assert_eq caps.get(1)?.start, 0;
assert_eq caps.get(1)?.end, 4;