---
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title: Fun - regex_demo.fun — overview
subtitle: Documentation for regex_demo.fun — overview
description: Documentation for regex_demo.fun — overview
permalink: /documentation/examples/regex_demo/
lang: en
tags:
- documentation
- handbook
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- usage
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---

# regex_demo.fun — overview

What it shows
- Regex helpers usage; simple matching and replacement tasks.

How to run
- export FUN_LIB_DIR="./lib"
- ./build_debug/fun examples/regex_demo.fun
- Or: fun examples/regex_demo.fun

Notes
- Some regex examples depend on the optional PCRE2 extension; enable it in your build to run.