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Function2 Alternatives
Similar projects and alternatives to function2
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amp-embedded-infra-lib
amp-embedded-infra-lib is a set of C++ libraries and headers that provide heap-less, STL like, infrastructure for embedded software development
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LSHBOX
A c++ toolbox of locality-sensitive hashing (LSH), provides several popular LSH algorithms, also support python and matlab.
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binutils-gdb
Discontinued Unofficial mirror of sourceware binutils-gdb repository. Updated daily. [GET https://api.github.com/repos/bminor/binutils-gdb: 404 - Not Found // See: https://docs.github.com/rest/repos/repos#get-a-repository]
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f-code
Discontinued a C++ library consisting of basic functionality [GET https://api.github.com/repos/StanislavPetrov15/f-code: 404 - Not Found // See: https://docs.github.com/rest/repos/repos#get-a-repository]
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NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better function2 alternative or higher similarity.
function2 discussion
function2 reviews and mentions
Posts with mentions or reviews of function2.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2025-06-15.
- Simplest C++ Callback, from SumatraPDF
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Callbacks in embedded | heapless environment
Fixed size function wrappers are not only limited and also a waste of space. Use a configurable function wrapper like fu2 with a stack allocator and set small object optimizer capacity to 0.
- Scriptable Headless Player Bots and independent ECS in a Custom UE C++ Server for MMO(RPG)s.
- A custom C++ server for the Unreal Engine 5, optimized for MMO(RPG)s.
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A simple std::function alternative that never allocates
std::function wasn't cutting it for me, but I ended up going with fu2::function. It comes with a lot of features (almost too many), but the header size and compile times are comparable to , and it fit my needs pretty well.
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Idle: an asynchronous and hot-reloadable C++ dynamic component framework
Thank you, function2 is also used heavily in Idle as a type-erasure backend for continuable that is the primary asynchronous task abstraction.
- Should std::function's move assignment operation be noexcept?
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Orthodox C++
You can write your own std::function, too, nor is it the only STL type that can take a capturing lambda (std::packaged_task for example).
A capturing lambda is just a class with an operator(). It's complicated to do what std::function does, but fully possible.
In fact, custom std::function replacements have better lambda support than std::function itself. Such as unique_function in https://github.com/Naios/function2 which can handle non-copyable lambdas.
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A note from our sponsor - SaaSHub
www.saashub.com | 16 Jun 2026
Stats
Basic function2 repo stats
8
601
3.3
11 months ago
Naios/function2 is an open source project licensed under gtkbook License which is not an OSI approved license.
The primary programming language of function2 is C++.
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