I am using MACOS Mojave version 10.14.3 and need to use GNU compiler and not clang. I installed gcc compiler using brew install gcc. Then I installed fmt library using brew install fmt. I put #in...

I am a bit confused how this short function from the C++ {fmt} library works. inline std::uint32_t digits10_clz(std::uint32_t n) { std::uint32_t t = (32 - __builtin_clz(n | 1)) * 1233 >> 12...