fsprojects/FSharpPlus
F#+ is a functional programming library for F# that provides a comprehensive set of abstractions, data structures, and utilities for functional programming. It supports monads, applicatives, functors, and other algebraic structures, along with type-level programming for compile-time safety. The system also includes documentation tools, test suites, and performance benchmarks to ensure robustness and correctness.
55.6
Adequate · 20 July 2026
20k
lines of production code
F#
primary language
3
bus factor · 76 authors in all
2
measurements over time
How it got here
2012–2017 · functional abstractions and modernization
This period focused on establishing the project's foundational structure and documentation while modernizing the codebase to target .NET 8 and F# 8. The work introduced new computation expression builders and utilities for functional programming abstractions, supported by comprehensive test coverage and detailed documentation for the library's core features.
5 changes
2019–2022 · Functional programming abstractions and type-level programming
This period focused on expanding the library's functional programming capabilities by introducing new type classes, data structures, and monad transformers. The work also established a robust testing and documentation infrastructure, including comprehensive test suites, benchmarking, and visual diagrams for functional abstractions. Additionally, the introduction of type-level programming support for vectors and matrices marked a significant addition to the library's type system.
12 changes
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About this page
- The description of this project is derived from its own commit history, not from its README.
- The score is its highest published measurement, taken on 20 July 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
- Measured at commit 44ebc378fa — the exact code this score is about.
- Scored under rubric rubric-2026.08.17. Score the same commit under that rubric and you get the same number.