boostorg/hana

Health v2 · maintenance only

Adoption not part of the score

1852 stars · 224 forks observed · 2026-08-28

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

Boost.Hana is a header-only C++14 metaprogramming library providing a standard library for computations on both types and values, including heterogeneous sequences, algorithms, and compile-time introspection. It is part of Boost and requires no external dependencies.

Use cases

• manipulate heterogeneous tuples at compile time in C++
• perform type-level computations with normal C++ syntax
• check expression validity without SFINAE tricks
• unroll loops at compile time
• introspect user-defined struct members
• replace MPL/Fusion-style metaprogramming with a modern API

When to choose

• you need compile-time computations on types and values in C++14 or later
• you want a header-only, dependency-free metaprogramming library
• you want to unify value and type computations in one API

When to avoid

• your codebase is limited to C++11-only compilers without full C++14 support
• you only need simple constexpr utilities that don't justify a metaprogramming library
• compile times are extremely critical and heavy template instantiation is unacceptable

Facets

library · maturity stable

serialization developer-tools programming-languages developer-tools cpp cross-platform metaprogramming header-only cpp14 cpp11 boost compile-time type-level-programming constexpr algorithms

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