The best replacement for regular expression is context free grammar.

The best alternatives to regular expression are rated as following:

★★★★★	context free grammar
★★★★★	regular language
★★★	regular grammar
★★★	wildcard
★★	parser
★★	glob
★	wildcards
★	literal string
	cfg
	grep
	extended regular expression

Your alternative for regular expression is not listed? Suggest!

Speaking about regular expression, one probably shouldn't forget about grep.

Other search terms related to regular expression and their ratings are:

★★★★★	grep
★★★	special characters
★★	or condition
	substring

You have in mind a companion for regular expression and it is not yet here? Propose!

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regular expression

context free grammar

regular language