hanickadot/compile-time-regular-expressions

Health v2 · maintenance only

Adoption not part of the score

3839 stars · 209 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A C++17/C++20 header-only library that evaluates regular expressions at compile time using constexpr and template metaprogramming. It supports matching, searching, capturing (including named captures), back-references, and most PCRE syntax with UTF-8 and Unicode property support.

Use cases

• validate strings against a regex with zero runtime parsing overhead
• extract capture groups from text in C++ with type-safe results
• replace std::regex with a faster compile-time alternative
• match UTF-8 strings with Unicode property support
• use regex in constexpr contexts during compilation

When to choose

• you know your regex patterns at compile time and want maximum performance
• you want a header-only dependency with no runtime regex compilation
• you need PCRE-like syntax in modern C++ (17/20)

When to avoid

• you need to build regex patterns dynamically at runtime
• you rely on PCRE features like callouts, conditional patterns, or subroutines
• you need a regex engine for a language other than C++

Facets

library · maturity stable

parser search-engine developer-tools parsers developer-tools cpp cross-platform regular-expressions constexpr compile-time header-only pcre cpp17 cpp20 template-metaprogramming algorithms

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