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clean-up nameof_type_impl

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terik23 2019-03-25 00:33:22 +05:00
parent 7723ced483
commit 4bb381d3e9
1 changed files with 6 additions and 10 deletions
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16
include/nameof.hpp
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@ -124,28 +124,24 @@ struct identity final {
template <typename T> template <typename T>
[[nodiscard]] constexpr std::string_view nameof_type_impl() noexcept { [[nodiscard]] constexpr std::string_view nameof_type_impl() noexcept {
#if defined(__clang__) #if defined(__clang__)
constexpr auto str = __PRETTY_FUNCTION__; std::string_view name{__PRETTY_FUNCTION__};
constexpr auto size = sizeof(__PRETTY_FUNCTION__) - 1;
constexpr auto prefix = sizeof("std::string_view nameof::detail::nameof_type_impl() [T = nameof::detail::identity<") - 1; constexpr auto prefix = sizeof("std::string_view nameof::detail::nameof_type_impl() [T = nameof::detail::identity<") - 1;
constexpr auto suffix = sizeof(">]") - 1; constexpr auto suffix = sizeof(">]") - 1;
#elif defined(__GNUC__) #elif defined(__GNUC__)
constexpr auto str = __PRETTY_FUNCTION__; std::string_view name{__PRETTY_FUNCTION__};
constexpr auto size = sizeof(__PRETTY_FUNCTION__) - 1;
constexpr auto prefix = sizeof("constexpr std::string_view nameof::detail::nameof_type_impl() [with T = nameof::detail::identity<") - 1; constexpr auto prefix = sizeof("constexpr std::string_view nameof::detail::nameof_type_impl() [with T = nameof::detail::identity<") - 1;
constexpr auto suffix = sizeof(">; std::string_view = std::basic_string_view<char>]") - 1; constexpr auto suffix = sizeof(">; std::string_view = std::basic_string_view<char>]") - 1;
#elif defined(_MSC_VER) #elif defined(_MSC_VER)
constexpr auto str = __FUNCSIG__; std::string_view name{__FUNCSIG__};
constexpr auto size = sizeof(__FUNCSIG__) - 1;
constexpr auto prefix = sizeof("class std::basic_string_view<char,struct std::char_traits<char> > __cdecl nameof::detail::nameof_type_impl<struct nameof::detail::identity<") - 1; constexpr auto prefix = sizeof("class std::basic_string_view<char,struct std::char_traits<char> > __cdecl nameof::detail::nameof_type_impl<struct nameof::detail::identity<") - 1;
constexpr auto suffix = sizeof(">>(void) noexcept") - 1; constexpr auto suffix = sizeof(">>(void) noexcept") - 1;
#else #else
constexpr auto str = "nameof_type::unsupported_compiler"; std::string_view name{"nameof_type::unsupported_compiler"};
constexpr auto size = sizeof("nameof_type::unsupported_compiler") - 1;
constexpr auto prefix = 0; constexpr auto prefix = 0;
constexpr auto suffix = 0; constexpr auto suffix = 0;
#endif #endif
name.remove_prefix(prefix);
std::string_view name{str + prefix, size - prefix - suffix}; name.remove_suffix(suffix);
if (name.size() > sizeof("enum") && name[0] == 'e' && name[1] == 'n' && name[2] == 'u' && name[3] == 'm' && name[4] == ' ') { if (name.size() > sizeof("enum") && name[0] == 'e' && name[1] == 'n' && name[2] == 'u' && name[3] == 'm' && name[4] == ' ') {
name.remove_prefix(sizeof("enum")); name.remove_prefix(sizeof("enum"));
} }