Rust Programming Cookbook

How it works...

After the initial setup in steps 1 and 2, we start by creating a tests module in step 3 along with the required dependencies. Step 4 then contains the first test that shows how the regex crate (https://docs.rs/regex/1.2.1/regex/) handles simple parsing of data.

By using the raw string literal syntax, r"I am a raw string", we compile a new Regex instance that we match to date strings. The included character classes are what is commonly used across OSes and languages, which includes support for whitespaces as well as (alpha) numerical characters and raw bytes. Additionally, flags can be placed directly in the expression using a (?flag) notation.

The regular expression in step 4 is composed of three parts: (?P<y>\d{4})-(?P<m>\d{2})-(?P<d>\d{2}) ...