clean-up
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neargye
parent
04f779655a
commit
8585365ef7
1 changed files with 89 additions and 88 deletions
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@ -68,11 +68,89 @@ struct identity final {
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using type = T;
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};
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[[nodiscard]] constexpr bool is_name_char(char c, bool front) noexcept {
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return (!front && c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_';
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template <typename... T>
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[[nodiscard]] constexpr std::string_view nameof_type_impl() noexcept {
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#if defined(__clang__)
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std::string_view name{__PRETTY_FUNCTION__};
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constexpr auto prefix = sizeof("std::string_view nameof::detail::nameof_type_impl() [T = <nameof::detail::identity<") - 1;
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constexpr auto suffix = sizeof(">>]") - 1;
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#elif defined(__GNUC__)
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std::string_view name{__PRETTY_FUNCTION__};
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constexpr auto prefix = sizeof("constexpr std::string_view nameof::detail::nameof_type_impl() [with T = {nameof::detail::identity<") - 1;
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constexpr auto suffix = sizeof(">}; std::string_view = std::basic_string_view<char>]") - 1;
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#elif defined(_MSC_VER)
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std::string_view name{__FUNCSIG__};
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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;
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constexpr auto suffix = sizeof(">>(void) noexcept") - 1;
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#else
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return {}; // Unsupported compiler.
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#endif
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#if defined(__clang__) || defined(__GNUC__) || defined(_MSC_VER)
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name.remove_prefix(prefix);
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name.remove_suffix(suffix);
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while (name.back() == ' ') {
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name.remove_suffix(1);
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}
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[[nodiscard]] constexpr std::string_view pretty_name(std::string_view name, bool with_template_suffix) noexcept {
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return name;
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#endif
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}
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template <typename E, E V>
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[[nodiscard]] constexpr std::string_view enum_name_impl() noexcept {
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static_assert(std::is_enum_v<E>, "nameof::enum_name_impl requires enum type.");
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#if defined(__clang__)
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constexpr std::string_view name{__PRETTY_FUNCTION__};
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constexpr auto suffix = sizeof("]") - 1;
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#elif defined(__GNUC__) && __GNUC__ >= 9
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constexpr std::string_view name{__PRETTY_FUNCTION__};
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constexpr auto suffix = sizeof("; std::string_view = std::basic_string_view<char>]") - 1;
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#elif defined(_MSC_VER)
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constexpr std::string_view name{__FUNCSIG__};
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constexpr auto suffix = sizeof(">(void) noexcept") - 1;
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#else
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return {}; // Unsupported compiler.
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#endif
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#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ >= 9) || defined(_MSC_VER)
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constexpr auto prefix = name.find_last_of(" :,-)", name.length() - suffix) + 1;
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if ((name[prefix] >= 'a' && name[prefix] <= 'z') || (name[prefix] >= 'A' && name[prefix] <= 'Z')) {
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return name.substr(prefix, name.size() - prefix - suffix);
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} else {
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return {}; // Value does not have name.
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}
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#endif
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}
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template <typename E, int O, int... I>
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[[nodiscard]] constexpr decltype(auto) enum_strings_impl(std::integer_sequence<int, I...>) noexcept {
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static_assert(std::is_enum_v<E>, "nameof::detail::enum_strings_impl requires enum type.");
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constexpr std::array<std::string_view, sizeof...(I)> enum_names{{enum_name_impl<E, static_cast<E>(I + O)>()...}};
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return enum_names;
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}
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template <typename E, typename U = std::underlying_type_t<E>>
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[[nodiscard]] constexpr std::string_view nameof_enum_impl(int value) noexcept {
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static_assert(std::is_enum_v<E>, "nameof::detail::nameof_enum_impl requires enum type.");
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static_assert(enum_range<E>::max > enum_range<E>::min, "nameof::enum_range requires max > min.");
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constexpr int max = enum_range<E>::max < (std::numeric_limits<U>::max)() ? enum_range<E>::max : (std::numeric_limits<U>::max)();
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constexpr int min = enum_range<E>::min > (std::numeric_limits<U>::min)() ? enum_range<E>::min : (std::numeric_limits<U>::min)();
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constexpr auto range = std::make_integer_sequence<int, max - min + 1>{};
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constexpr auto names = enum_strings_impl<E, min>(range);
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const int i = value - min;
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if (i >= 0 && static_cast<std::size_t>(i) < names.size()) {
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return names[i];
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} else {
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return {}; // Value out of range.
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}
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}
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template <typename T>
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[[nodiscard]] constexpr std::string_view nameof_impl(std::string_view name, bool with_template_suffix) noexcept {
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if (name.length() >= 1 && (name.front() == '"' || name.front() == '\'')) {
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return {}; // Narrow multibyte string literal.
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} else if (name.length() >= 2 && name[0] == 'R' && (name[1] == '"' || name[1] == '\'')) {
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@ -130,102 +208,25 @@ struct identity final {
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}
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for (std::size_t i = name.size() - s; i > 0; --i) {
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if (!is_name_char(name[i - 1], false)) {
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if (!((name[i - 1] >= '0' && name[i - 1] <= '9') ||
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(name[i - 1] >= 'a' && name[i - 1] <= 'z') ||
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(name[i - 1] >= 'A' && name[i - 1] <= 'Z') ||
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(name[i - 1] == '_'))) {
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name.remove_prefix(i);
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break;
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}
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}
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name.remove_suffix(with_template_suffix ? 0 : s);
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if (name.length() > 0 && is_name_char(name.front(), true)) {
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if (name.length() > 0 && ((name.front() >= 'a' && name.front() <= 'z') ||
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(name.front() >= 'A' && name.front() <= 'Z') ||
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(name.front() == '_'))) {
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return name;
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} else {
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return {}; // Invalid name.
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}
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}
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template <typename... T>
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[[nodiscard]] constexpr std::string_view nameof_type_impl() noexcept {
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#if defined(__clang__)
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std::string_view name{__PRETTY_FUNCTION__};
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constexpr auto prefix = sizeof("std::string_view nameof::detail::nameof_type_impl() [T = <nameof::detail::identity<") - 1;
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constexpr auto suffix = sizeof(">>]") - 1;
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#elif defined(__GNUC__)
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std::string_view name{__PRETTY_FUNCTION__};
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constexpr auto prefix = sizeof("constexpr std::string_view nameof::detail::nameof_type_impl() [with T = {nameof::detail::identity<") - 1;
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constexpr auto suffix = sizeof(">}; std::string_view = std::basic_string_view<char>]") - 1;
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#elif defined(_MSC_VER)
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std::string_view name{__FUNCSIG__};
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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;
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constexpr auto suffix = sizeof(">>(void) noexcept") - 1;
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#else
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return {}; // Unsupported compiler.
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#endif
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#if defined(__clang__) || defined(__GNUC__) || defined(_MSC_VER)
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name.remove_prefix(prefix);
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name.remove_suffix(suffix);
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while (name.back() == ' ') {
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name.remove_suffix(1);
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}
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return name;
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#endif
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}
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template <typename E, E V>
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[[nodiscard]] constexpr std::string_view enum_name_impl() noexcept {
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static_assert(std::is_enum_v<E>, "nameof::enum_name_impl requires enum type.");
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#if defined(__clang__)
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std::string_view name{__PRETTY_FUNCTION__};
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constexpr auto suffix = sizeof("]") - 1;
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#elif defined(__GNUC__) && __GNUC__ >= 9
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std::string_view name{__PRETTY_FUNCTION__};
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constexpr auto suffix = sizeof("; std::string_view = std::basic_string_view<char>]") - 1;
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#elif defined(_MSC_VER)
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std::string_view name{__FUNCSIG__};
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constexpr auto suffix = sizeof(">(void) noexcept") - 1;
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#else
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return {}; // Unsupported compiler.
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#endif
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#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ >= 9) || defined(_MSC_VER)
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name.remove_suffix(suffix);
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return pretty_name(name, false);
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#endif
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}
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template <typename E, int O, int... I>
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[[nodiscard]] constexpr decltype(auto) enum_strings_impl(std::integer_sequence<int, I...>) noexcept {
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static_assert(std::is_enum_v<E>, "nameof::detail::enum_strings_impl requires enum type.");
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constexpr std::array<std::string_view, sizeof...(I)> enum_names{{enum_name_impl<E, static_cast<E>(I + O)>()...}};
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return enum_names;
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}
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template <typename E, typename U = std::underlying_type_t<E>>
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[[nodiscard]] constexpr std::string_view nameof_enum_impl(int value) noexcept {
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static_assert(std::is_enum_v<E>, "nameof::detail::nameof_enum_impl requires enum type.");
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static_assert(enum_range<E>::max > enum_range<E>::min, "nameof::enum_range requires max > min.");
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constexpr int max = enum_range<E>::max < (std::numeric_limits<U>::max)() ? enum_range<E>::max : (std::numeric_limits<U>::max)();
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constexpr int min = enum_range<E>::min > (std::numeric_limits<U>::min)() ? enum_range<E>::min : (std::numeric_limits<U>::min)();
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constexpr auto enum_range = std::make_integer_sequence<int, max - min + 1>{};
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constexpr auto enum_names = enum_strings_impl<E, min>(enum_range);
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const int i = value - min;
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if (i >= 0 && static_cast<std::size_t>(i) < enum_names.size()) {
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return enum_names[i];
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} else {
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return {}; // Value out of range.
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}
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}
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template <typename T>
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[[nodiscard]] constexpr std::string_view nameof_impl(std::string_view name, bool with_template_suffix) noexcept {
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return pretty_name(name, with_template_suffix);
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}
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template <typename T>
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[[nodiscard]] constexpr std::string_view nameof_raw_impl(std::string_view name) noexcept {
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return name;
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