FL

Flex

Flex is a fast lexical analyzer generator designed for creating programs that perform pattern-matching on text. It reads scanner descriptions and generates C source code for lexical analyzers.
Latest: 2.5.4
Last checked: Jul 16, 2025 8:35pm
Rank: 5333/15140
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Overview

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License: GPL (GNU General Public License)Installer: exeWinget: Available
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Version & Lifecycle

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Current: 2.5.4 Oldest supported: 2.5.4a-1 Avg cadence: Infrequent

Tags

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lexical analyzer scanner generator pattern matching GNU Win32

Top Contributors

Top sitewide contributors:

  1. Anbarasan
  2. nico_k
  3. Bob
  4. Vigneshwaran

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Also known as

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flex

Packaging Notes

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Native Win32 open source port of GNU Flex

Notes

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Version 2.5.4a-1 is the known GnuWin32 release. Installation is via a small executable (~30 MB). No official silent install/uninstall commands documented.

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