Matcheroni, a tiny C++20 header library for building lexers/parsers
Howdy HN, as part of my ongoing programming language experiments I've ended up creating my own C++20 lexing and parsing library of sorts. Matcheroni is an alternative to parser generators and regular expressions that uses trees of C++ templates to implement highly customizable lexers and parsers that have minimal impact on build times or binary sizes, while still remaining comparable in performance to Boost regular expressions. The repo includes two example projects - a simple regex parser in ~300 heavily documented lines of code, and a much larger but not quite finished C99 lexer and…
In plain words
Matcheroni is a C++20 header library for building lexers and parsers as an alternative to traditional parser generators and regular expressions. It uses C++ templates to create customizable parsers with minimal build time and binary size impact while maintaining performance comparable to Boost regex. The library includes example projects such as a regex parser and a C99 lexer, designed for developers working on programming language experiments or compiler-related work.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Howdy HN, as part of my ongoing programming language experiments I've ended up creating my own C++20 lexing and parsing library of sorts. Matcheroni is an alternative to parser generators and regular expressions that uses trees of C++ templates to implement highly customizable lexers and parsers that have minimal impact on build times or binary sizes, while still remaining comparable in performance to Boost regular expressions. The repo includes two example projects - a simple regex parser in ~300 heavily documented lines of code, and a much larger but not quite finished C99 lexer and parser. All feedback appreciated!
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