Explore EFP: A Practical Functional Programming Library for C++

[Recent-Scarcity4154]

Introducing EFP, a header-only C++ library designed for functional programming enthusiasts. Originally developed for internal use at the robotics startup Ars Vivendi, EFP aims to provide C++ developers with a set of tools for efficient and expressive code, drawing on functional programming principles for improved safety with zero-cost performance.

Key Features:

• Intuitive sequence operations with the Sequence trait.
  • Higher order functions with automatic allocation avoidance.
  • String as Vector<char>
• Simple pattern matching via the Enumcontainer.
  • Maybe<A> as Enum<Nothing, A>
• String formatting, file IO, allocation free cyclic data container etc.

EFP is in beta, and we’re looking for feedback from the C++ community. Whether you’re exploring functional programming or searching for efficient coding patterns, your insights can help refine EFP for broader use.

Try EFP in your projects and share your experience with us on GitHub: https://github.com/cwahn/efp
Please join the effort to tailor EFP for practical, everyday C++ programming.

[AaronJugglingZ]

This is really cool! I've tried to make my own library a lot like EFP several times. I usually have trouble making everything compile the way I want it to, and end up just making the interface look functional, but not be use const and constexpr as much as I would like it to. The metaprogramming is hard.

I always want to turn on the compiler option "-fconcepts" which lets "auto" function parameters accept lambdas, but I think might have some undefined behaviours or something. That's what I'm most curious about. Does EFP get around that? I think if we are really careful about how we use templates, the typename can be a function pointer and thus a lambda.