serge-sans-paille/frozen

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1571 stars · 116 forks observed · 2026-08-28

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

Frozen is a header-only C++14 library providing constexpr-compatible immutable containers (set, map, unordered variants) with zero-cost initialization and perfect hashing, serving as a constexpr alternative to gperf. It also offers fixed-capacity constinit-compatible maps and compile-time string search algorithms like Boyer-Moore and Knuth-Morris-Pratt.

Use cases

• compile-time lookup tables in C++
• replace gperf with constexpr perfect hash maps
• fast immutable string-to-value mappings
• zero-cost initialization of static containers
• constexpr string search with Boyer-Moore
• fixed-capacity maps with compile-time keys

When to choose

• you need compile-time initialized immutable containers in C++14
• you want faster lookups via perfect hashing without runtime setup
• you want a modern constexpr alternative to gperf
• you need zero-cost static lookup tables

When to avoid

• you need mutable containers or runtime-modifiable keys
• your compiler is older than C++14 (e.g. GCC 5)
• you need dynamically sized containers
• you need frequent container updates after initialization

Facets

library · maturity maintenance

search-engine serialization developer-tools performance cpp cross-platform header-only constexpr perfect-hashing immutable-containers gperf-alternative c++14 algorithms

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