ruby-regexp-parser 2.1.1-2 (amd64 binary) in ubuntu jammy

 A library for tokenizing, lexing, and parsing Ruby regular expressions.
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  * Multilayered
    * A scanner/tokenizer based on Ragel
    * A lexer that produces a "stream" of token objects.
    * A parser that produces a "tree" of Expression objects (OO API)
  * Runs on Ruby 1.9, 2.x, and JRuby (1.9 mode) runtimes.
  * Recognizes Ruby 1.8, 1.9, and 2.x regular expressions