rustHow do you match strings with regex in Rust?

Matching strings with regex in Rust is done using the regex crate. This crate provides a Regex type which can be used to match strings against a regular expression.

Example code

use regex::Regex;

let re = Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();
assert!(re.is_match("2018-01-01"));

Output example

(no output)

Code explanation

• use regex::Regex: imports the Regex type from the regex crate.
• Regex::new(r"^\d{4}-\d{2}-\d{2}$"): creates a new Regex object from the given regular expression.
• .unwrap(): unwraps the Result returned by Regex::new and panics if the regular expression is invalid.
• re.is_match("2018-01-01"): checks if the given string matches the regular expression.

Helpful links

• Regex crate documentation

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