tiny regex

This is tiny regex c packaged for the Zig build system.

Supported operations

NOTE: inverted character classes are buggy - see the test harness for concrete examples.

• . Dot, matches any character
• ^ Start anchor, matches beginning of string
• $ End anchor, matches end of string
• * Asterisk, match zero or more (greedy)
• + Plus, match one or more (greedy)
• ? Question, match zero or one (non-greedy)
• [abc] Character class, match if one of {'a', 'b', 'c'}
• [^abc] Inverted class, match if NOT one of {'a', 'b', 'c'}
• [a-zA-Z] Character ranges, the character set of the ranges { a-z | A-Z }
• \s Whitespace, \t \f \r \n \v and spaces
• \S Non-whitespace
• \w Alphanumeric, [a-zA-Z0-9_]
• \W Non-alphanumeric
• \d Digits, [0-9]
• \D Non-digits