eliaskosunen/scnlib

Health v2 · maintenance only

Adoption not part of the score

1316 stars · 57 forks observed · 2026-08-28

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

scnlib is a modern C++ library for text parsing, serving as a type-safe and faster replacement for scanf and std::istream. It is the inverse of {fmt}/std::format and the reference implementation of the ISO C++ standards proposal P1729 'Text Parsing'.

Use cases

• parse integers and floats from strings in C++
• replace scanf with type-safe input parsing
• read values from stdin without iostreams
• parse comma-separated values from text
• scan chrono types and pointers from input
• build fast text-parsing in C++17/20/23 projects

When to choose

• you need type-safe, fast text scanning in modern C++
• you want a std::format-like API for input instead of output
• you are evaluating or implementing P1729 text parsing semantics
• you want to replace scanf or std::istream in a C++ codebase

When to avoid

• you need regex-based or pattern-based text matching rather than typed value scanning
• your project targets pre-C++17 compilers
• you only need output formatting, where {fmt} or std::format suffices

Facets

library · maturity stable

parser serialization developer-tools parsers programming-languages developer-tools cpp cross-platform windows scanf text-parsing type-safe-io fmt cmake cpp17 ranges p1729 linux macos

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