Function cpp20_and_in_constexpr

source/extern/fast_float.h:325–331

namespace fast_float {

fastfloat_really_inline constexpr bool cpp20_and_in_constexpr() {
#if FASTFLOAT_HAS_IS_CONSTANT_EVALUATED
  return std::is_constant_evaluated();
#else
  return false;
#endif
}

template <typename T>
fastfloat_really_inline constexpr bool is_supported_float_type() {