Am 19.08.22 um 03:53 schrieb Proton via Boost:
Using __builtin_bit_cast should be fine for conditional C++17 support since we already rely on __builtin_is_constant_evaluated. I’ll play with it this weekend and see where it get us. Worst case is we static_assert unsupported cases like John suggested.
Hi Matt, I see that you have started work on ccmath::signbit/copysign/etc. I also. Our basic problem is that std::bit_cast is only available with C++20. You are already trying to provide this for C++17 (BOOST_MATH_BIT_CAST). My questions: - can you *guarantee* that BOOST_MATH_BIT_CAST works on/with all platforms/compilers ? - if not: does it make sense to upgrade ccmath to C++20 so that std::bit_cast is available ? Otherwise I can only oracle and provide code to the best of my knowledge - without guarantee that it works on/with all platforms/compilers :-( regards Gero