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re2c

A tool for generating C-based recognizers from regular expressions

  • development-tool
  • Dev
  • CLI
  • CODE-GENERATION
  • Launchable
  • Runs in terminal
official+codex · reviewed · May 28, 2026 description in en

Description

Generates efficient C-based recognizers from regular expressions. It helps developers build lexers, parsers, and scanners without maintaining hand-written state machines.

Use it as a code generator. Generated recognizers depend on the rules provided, so test malformed input and review generated code before using it in parsers exposed to users.

How to run

re2c

Commands: re2c

Permissions

Permissions not analysed for this source yet.