A small header library for the fun of it

As part of my experimentation with some things for a project I've been working on I decided to write a small C header library to see what sort of things I could do with what langauge features I had available to me. Unfortunately several of the things I wanted to do required importing some C++ features. Additionally several GNU C/C++ extensions are being used.

Video demo: https://www.youtube.com/watch?v=jAdAF3RJkPg

C++ features used:

• Function overloading
• auto (makes some macro stuff nicer)
• References T& (because taking the address of a literal is disallowed)

GNU C/C++ extensions used:

• Statement expressions
• __attribute__((__cleanup__(function_name)))
• Double pound sign ## between comma and __VA_ARGS__
• typeof expression

This is known to compile and run with Clang and GCC when compiling in C++ mode. The example code in playground/playground.cpp successfully runs with both both ubsan and asan.

Please do not use this for any serious projects. The hashmap implementation is extremely amateurish, the API coverage is poor, and the compiler feature requirements makes this not as portable as I would have wanted. If you really need typesafe containers and other goodies for pure C then you should probably take a look at the stb libraries. I've not used any of them myself but I've heard great things about them.