tiny::optional – a C++ optional that does not waste memory

1. tiny

   1 3 113 10.0 C++

   low-level library for minimizing the size of your types (by foonathan)

   

   I actually came across the term "tombstone" before, in the "foonathan/tiny" library. I found that one after I started building tiny::optional, and it seems to have similar use cases, but also seemed abandoned and not to implement a fully fledged std::optional replacement. So maybe he got the idea from the talk by Arthur O'Dwyer.

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3. tiny-optional

   2 3 129 5.0 C++

   Replacement for std::optional that does not waste memory unnecessarily

   

   tiny::optional is a header-only C++ library for x86/x64 intended to be a drop-in replacement for std::optional with the twist that it does not require additional memory for bools, floats, doubles and raw pointers. For example, a std::optional has twice the size of a raw double because of 7 padding bytes after the internal bool. These wasted bytes can have a notable impact on performance in memory bound applications. On the other hand, a tiny::optional has the size of a double by exploiting unused bit patterns (i.e. by exploiting platform specific behavior).

4. compact_optional

   3 1 26 10.0 C++

   A template for creating optional-like object with no space overhead

   

   Or there's this from 2015: https://github.com/akrzemi1/compact_optional

5. cmake-init

   4 165 2,371 6.7 CMake

   The missing CMake project initializer

   

   Grab cmake-init and you won't even have to think much about how to support clients using CMake.

6. libCat

   5 22 100 9.2 C++

   🐈‍⬛ A runtime for C++26 w/out libC or POSIX. Smaller binaries, only arena allocators, SIMD, stronger type safety than STL, and value-based errors!

   

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