type_name_to_string.h

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// Compile time pretty type name and enum name generator
//
// From StackOverflow https://stackoverflow.com/a/56766138
// Note that prefix and suffix strings may change with compiler versions

#pragma once

#include <string_view>

template <typename T>
constexpr auto type_name() noexcept {
  std::string_view name = "Error: unsupported compiler", prefix, suffix;
#ifdef __clang__
  name = __PRETTY_FUNCTION__;
  prefix = "auto type_name() [T = ";
  suffix = "]";
#elif defined(__GNUC__)
  name = __PRETTY_FUNCTION__;
  prefix = "constexpr auto type_name() [with T = ";
  suffix = "]";
#elif defined(_MSC_VER)
  name = __FUNCSIG__;
  prefix = "auto __cdecl type_name<";
  suffix = ">(void) noexcept";
#endif
  name.remove_prefix(prefix.size());
  name.remove_suffix(suffix.size());
  return name;
}

template <auto E>
constexpr auto enum_name() noexcept {
  static_assert(std::is_enum_v<decltype(E)>);
  std::string_view name = "Error: unsupported compiler", prefix, suffix;
#ifdef __clang__
  name = __PRETTY_FUNCTION__;
  prefix = "auto enum_name() [E = ";
  suffix = "]";
#elif defined(__GNUC__)
  name = __PRETTY_FUNCTION__;
  prefix = "constexpr auto enum_name() [with auto E = ";
  suffix = "]";
#elif defined(_MSC_VER)
  name = __FUNCSIG__;
  prefix = "auto __cdecl enum_name<";
  suffix = ">(void) noexcept";
#endif
  name.remove_prefix(prefix.size());
  name.remove_suffix(suffix.size());
  if (const auto pos = name.find_last_of(":)"); pos != std::string_view::npos) {
    name.remove_prefix(pos + 1);
  }
  return name;
}