rustHow to use regex builder in Rust?

Regex builder in Rust is a powerful tool for creating regular expressions. It allows you to quickly and easily create complex regular expressions.

Example code

let re = RegexBuilder::new(r"\d{4}-\d{2}-\d{2}")
    .case_insensitive(true)
    .build()
    .unwrap();

Output example

Regex(r"\d{4}-\d{2}-\d{2}", CaseInsensitive(true))

The code above creates a regular expression that matches a date in the format of YYYY-MM-DD, and is case insensitive.

The code consists of the following parts:

• RegexBuilder::new(r"\d{4}-\d{2}-\d{2}") creates a new RegexBuilder object with the regular expression pattern.
• case_insensitive(true) sets the regular expression to be case insensitive.
• build() builds the regular expression.
• unwrap() unwraps the result of the build, returning the Regex object.

Helpful links

• The Rust Regex Guide
• The Rust Regex Cheatsheet

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