regexutils

func DestructivelySimplify ¶

func DestructivelySimplify(regex *syntax.Regexp) *syntax.Regexp

DestructivelySimplify simplifies the regex ($regex is not modified), it first calls TurnCapturingGroupsIntoNonCapturing, then syntax.Regexp.DestructivelySimplify, and finally it tries its best to simplify the elements of shape AA* into A+.

func RegexForRange ¶

func RegexForRange(min, max int64, conf ...IntegerRangeRegexConfig) string

RegexForRange returns a regex (not between ^$) that matches all numbers in the range [min, max]. The main logic of the implementation is the same as https://github.com/voronind/range-regex (by Dmitry Voronin, BSD 2-Clause license).

func TurnCapturingGroupsIntoNonCapturing ¶

func TurnCapturingGroupsIntoNonCapturing(regex *syntax.Regexp) *syntax.Regexp