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improve nameof_enum_impl & nameof_type_impl

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terik23 2019-03-25 01:12:29 +05:00
parent 4bb381d3e9
commit 46475eca5d
1 changed files with 25 additions and 15 deletions
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40
include/nameof.hpp
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@ -136,12 +136,13 @@ template <typename T>
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
std::string_view name{"nameof_type::unsupported_compiler"}; return "nameof_type::unsupported_compiler";
constexpr auto prefix = 0;
constexpr auto suffix = 0;
#endif #endif
#if defined(__clang__) || defined(__GNUC__) || defined(_MSC_VER)
name.remove_prefix(prefix); name.remove_prefix(prefix);
name.remove_suffix(suffix); name.remove_suffix(suffix);
# if defined(_MSC_VER)
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"));
} }
@ -151,33 +152,42 @@ template <typename T>
if (name.size() > sizeof("struct") && name[0] == 's' && name[1] == 't' && name[2] == 'r' && name[3] == 'u' && name[4] == 'c' && name[5] == 't' && name[6] == ' ') { if (name.size() > sizeof("struct") && name[0] == 's' && name[1] == 't' && name[2] == 'r' && name[3] == 'u' && name[4] == 'c' && name[5] == 't' && name[6] == ' ') {
name.remove_prefix(sizeof("struct")); name.remove_prefix(sizeof("struct"));
} }
# endif
while (name.back() == ' ') { while (name.back() == ' ') {
name.remove_suffix(1); name.remove_suffix(1);
} }
return name; return name;
#endif
} }
template <typename E, E V> template <typename E, E V>
[[nodiscard]] constexpr std::string_view nameof_enum_impl() noexcept { [[nodiscard]] constexpr std::string_view nameof_enum_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 suffix = sizeof("]") - 1; constexpr auto suffix = sizeof("]") - 1;
return detail::pretty_name({str, size - suffix}, false);
#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_enum_impl() [with E = ") + nameof_type_impl<identity<E>>().length() + sizeof("; V = "); constexpr auto prefix = sizeof("constexpr std::string_view nameof::detail::nameof_enum_impl() [with E = ") + nameof_type_impl<identity<E>>().length() + sizeof("; V = ");
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;
return {str + prefix, size - prefix - suffix}; name.remove_prefix(prefix);
#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 suffix = sizeof(">(void) noexcept") - 1; constexpr auto suffix = sizeof(">(void) noexcept") - 1;
return detail::pretty_name({str, size - suffix}, false);
#else #else
return {"nameof_enum::unsupported_compiler"}; return "nameof_enum::unsupported_compiler";
#endif
#if defined(__clang__) || defined(__GNUC__) || defined(_MSC_VER)
name.remove_suffix(suffix);
# if defined(__clang__) || defined(_MSC_VER)
for (std::size_t i = name.size(); i > 0; --i) {
if (!is_name_char(name[i - 1])) {
name.remove_prefix(i);
break;
}
}
# endif
return name;
#endif #endif
} }
@ -220,7 +230,7 @@ struct nameof_enum_t<E, NAMEOF_ENUM_MAX_SEARCH_DEPTH> final {
template <typename T, typename = std::enable_if_t<!std::is_reference_v<T>>> template <typename T, typename = std::enable_if_t<!std::is_reference_v<T>>>
[[nodiscard]] constexpr std::string_view nameof_impl(std::string_view name, bool with_suffix) noexcept { [[nodiscard]] constexpr std::string_view nameof_impl(std::string_view name, bool with_suffix) noexcept {
return detail::pretty_name(name, with_suffix); return pretty_name(name, with_suffix);
} }
[[nodiscard]] constexpr std::string_view nameof_raw_impl(std::string_view name) noexcept { [[nodiscard]] constexpr std::string_view nameof_raw_impl(std::string_view name) noexcept {