pregexp: Portable Regular Expressions for Scheme and Common Lisp pregexp.scm is a portable library for regular expressions (aka regexps or regexes) that runs in any Scheme that complies with R4RS or R5RS [2]. It provides regular expressions modeled on Perlâs [1, 3], and includes such powerful directives as numeric and nongreedy quantifiers, capturing and non-capturing clustering, POSIX character
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