# Dobiasd/FunctionalPlus

Functional Programming Library for C++. Write concise and readable C++ code.

Repository: https://github.com/Dobiasd/FunctionalPlus
Canonical: https://ross.abutalabs.com/products/functionalplus
Homepage: https://www.daiw.de/fplus-api-search/
Language: C++
License: BSL-1.0
License Family: other
Topics: range, composition, stl, functional-programming, algorithms, header-only, c-plus-plus, c-plus-plus-14, c-plus-plus-17, library, cpp, cpp14
Last push: 2026-07-15T15:47:54+00:00

## Health v2 (maintenance only)
Score: 81/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 92, release rhythm 57, longevity 100
- inputs: {"age_days": 3936, "days_push": 49, "days_rel": 128, "gap_med": 101.0, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2295, forks 179 (observed 2026-08-28T04:06:35.149088+00:00)

## What it is
FunctionalPlus is a small, header-only C++ library providing pure functional programming helpers like keep_if, forward application, and function composition. It aims to make C++ code more concise and readable by replacing boilerplate loops and iterator plumbing with high-level, self-documenting functions.

## Use cases
- write concise and readable C++ code
- filter, transform, and reduce STL containers without hand-written loops
- compose and forward-apply functions in C++
- reduce iterator boilerplate when processing collections
- write pure functions over ranges in C++14/17

## When to choose
- you want functional-style collection manipulation in plain C++ without heavy dependencies
- you need a header-only library that works with C++14 or C++17
- you prefer readable one-liners over manual for loops and std::copy_if calls

## When to avoid
- you need full lazy range pipelines with views and actions, where range-v3 or C++20 ranges fit better
- your project targets C++11 or older standards
- you need runtime performance tuning beyond what STL algorithms already provide

## Facets
- artifact type: library
- maturity: stable
- function: developer-tools
- domain: developer-tools, programming-languages
- platform: cpp, cross-platform
- tags: functional-programming, header-only, stl, range, function-composition, cpp14, cpp17, algorithms

## Member repositories
- Dobiasd/FunctionalPlus (main) score 81

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:35.149088+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:40:20.207636+00:00, confidence not recorded.
  - readme: https://github.com/Dobiasd/FunctionalPlus (fetched 2026-08-28T04:06:35.149088+00:00, sha 8d46804fb162)
  - homepage: https://www.daiw.de/fplus-api-search/ (fetched 2026-08-29T10:20:39.575300+00:00, sha 5dac84d1b0b0)
- Data as of 2026-08-30T08:39:29.467469+00:00.