hirrolot/metalang99

Health v2 · maintenance only

Adoption not part of the score

1082 stars · 33 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Metalang99 is a header-only C99 preprocessor metaprogramming library that implements a functional programming language atop of C preprocessor macros. It provides compile-time features such as recursion, algebraic data types, pattern matching, currying, and list manipulation, all evaluated at compile time.

Use cases

• write preprocessor metaprograms in pure C99
• generate C code at compile time with macros
• implement macro recursion and pattern matching in C
• overload C macros on the number of arguments
• manipulate lists at compile time in C
• build type-safe macro libraries like Datatype99 and Interface99

When to choose

• you need powerful compile-time code generation in plain C99 without external codegen tools
• you want a header-only, dependency-free metaprogramming foundation for C macro libraries
• you need macro overloading, recursion, or ADT-style metaprogramming in C

When to avoid

• your team prefers readable, conventional C code over dense macro metaprogramming
• you need runtime metaprogramming or reflection rather than compile-time expansion
• compile times and macro error complexity are critical constraints for your project

Facets

library · maturity active

interpreter programming-language parser developer-tools programming-languages developer-tools c cpp cross-platform preprocessor-metaprogramming header-only functional-programming macros c99 compile-time embedded-language algorithms

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