This is a C++20 constexpr implementation of the XXH3 64-bit variant of xxHash
Three functions are implemented: XXH3_64bits_const, XXH3_64bits_withSecret_const, XXH3_64bits_withSeed_const.
Also included is a unit test to ensure they produce exactly the same results as the xxHash library.
Credits to:
- @Cyan4973 -- author of xxHash
- @ekpyron -- author of xxhashct, a constexpr implementation of XXH64 and XXH32
- @t-mat -- for sharing another constexpr implementation of XXH32