Top 8 constexpr open source projects

A Compile time PCRE (almost) compatible regular expression matcher.

C++17 string with fixed size

A universal type for non-type template parameters for C++20 or later.

std::bitset with constexpr implementations plus additional features.

C++17 constexpr implementation of inet_addr / inet_aton / inet_pton

build-time code-execution for java, a bit like constexpr in C++11

A comparison of different options to implement binary flags in C++17

The wanna-be-simplest command line arguments library for C++