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less bin size, thanks @rollbear

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neargye 2019-08-26 21:56:57 +05:00
parent f6a6c5de10
commit 23c959c3e2
1 changed files with 68 additions and 32 deletions
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100
include/nameof.hpp
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@ -99,6 +99,26 @@ struct nameof_enum_supported final
: std::false_type {}; : std::false_type {};
#endif #endif
template <std::size_t N>
struct static_string final {
constexpr static_string(std::string_view str) noexcept : static_string(str, std::make_index_sequence<N>{}) {}
constexpr operator std::string_view() const noexcept { return {chars.data(), chars.size()}; }
private:
template <std::size_t... I>
constexpr static_string(std::string_view str, std::index_sequence<I...>) noexcept : chars{{str[I]...}} {}
const std::array<char, N> chars;
};
template <>
struct static_string<0> final {
constexpr static_string(std::string_view) noexcept {}
constexpr operator std::string_view() const noexcept { return {}; }
};
template <typename T> template <typename T>
using remove_cvref_t = std::remove_cv_t<std::remove_reference_t<T>>; using remove_cvref_t = std::remove_cv_t<std::remove_reference_t<T>>;
@ -108,23 +128,23 @@ using enable_if_enum_t = std::enable_if_t<std::is_enum_v<remove_cvref_t<T>>, R>;
template <typename T = void> template <typename T = void>
[[nodiscard]] constexpr std::string_view nameof(std::string_view name, bool remove_template_suffix = true) noexcept { [[nodiscard]] constexpr std::string_view nameof(std::string_view name, bool remove_template_suffix = true) noexcept {
static_assert(std::is_void_v<T>, "nameof::detail::nameof requires void type."); static_assert(std::is_void_v<T>, "nameof::detail::nameof requires void type.");
if (name.length() >= 1 && (name.front() == '"' || name.front() == '\'')) { if (name.size() >= 1 && (name.front() == '"' || name.front() == '\'')) {
return {}; // Narrow multibyte string literal. return {}; // Narrow multibyte string literal.
} else if (name.length() >= 2 && name[0] == 'R' && (name[1] == '"' || name[1] == '\'')) { } else if (name.size() >= 2 && name[0] == 'R' && (name[1] == '"' || name[1] == '\'')) {
return {}; // Raw string literal. return {}; // Raw string literal.
} else if (name.length() >= 2 && name[0] == 'L' && (name[1] == '"' || name[1] == '\'')) { } else if (name.size() >= 2 && name[0] == 'L' && (name[1] == '"' || name[1] == '\'')) {
return {}; // Wide string literal. return {}; // Wide string literal.
} else if (name.length() >= 2 && name[0] == 'U' && (name[1] == '"' || name[1] == '\'')) { } else if (name.size() >= 2 && name[0] == 'U' && (name[1] == '"' || name[1] == '\'')) {
return {}; // UTF-32 encoded string literal. return {}; // UTF-32 encoded string literal.
} else if (name.length() >= 2 && name[0] == 'u' && (name[1] == '"' || name[1] == '\'')) { } else if (name.size() >= 2 && name[0] == 'u' && (name[1] == '"' || name[1] == '\'')) {
return {}; // UTF-16 encoded string literal. return {}; // UTF-16 encoded string literal.
} else if (name.length() >= 3 && name[0] == 'u' && name[1] == '8' && (name[2] == '"' || name[2] == '\'')) { } else if (name.size() >= 3 && name[0] == 'u' && name[1] == '8' && (name[2] == '"' || name[2] == '\'')) {
return {}; // UTF-8 encoded string literal. return {}; // UTF-8 encoded string literal.
} else if (name.length() >= 1 && (name.front() >= '0' && name.front() <= '9')) { } else if (name.size() >= 1 && (name.front() >= '0' && name.front() <= '9')) {
return {}; // Invalid name. return {}; // Invalid name.
} }
for (std::size_t i = name.length(), h = 0, s = 0; i > 0; --i) { for (std::size_t i = name.size(), h = 0, s = 0; i > 0; --i) {
if (name[i - 1] == ')') { if (name[i - 1] == ')') {
++h; ++h;
++s; ++s;
@ -145,7 +165,7 @@ template <typename T = void>
} }
std::size_t s = 0; std::size_t s = 0;
for (std::size_t i = name.length(), h = 0; i > 0; --i) { for (std::size_t i = name.size(), h = 0; i > 0; --i) {
if (name[i - 1] == '>') { if (name[i - 1] == '>') {
++h; ++h;
++s; ++s;
@ -164,7 +184,7 @@ template <typename T = void>
} }
} }
for (std::size_t i = name.length() - s; i > 0; --i) { for (std::size_t i = name.size() - s; i > 0; --i) {
if (!((name[i - 1] >= '0' && name[i - 1] <= '9') || if (!((name[i - 1] >= '0' && name[i - 1] <= '9') ||
(name[i - 1] >= 'a' && name[i - 1] <= 'z') || (name[i - 1] >= 'a' && name[i - 1] <= 'z') ||
(name[i - 1] >= 'A' && name[i - 1] <= 'Z') || (name[i - 1] >= 'A' && name[i - 1] <= 'Z') ||
@ -177,9 +197,9 @@ template <typename T = void>
name.remove_suffix(s); name.remove_suffix(s);
} }
if (name.length() > 0 && ((name.front() >= 'a' && name.front() <= 'z') || if (name.size() > 0 && ((name.front() >= 'a' && name.front() <= 'z') ||
(name.front() >= 'A' && name.front() <= 'Z') || (name.front() >= 'A' && name.front() <= 'Z') ||
(name.front() == '_'))) { (name.front() == '_'))) {
return name; return name;
} }
@ -197,38 +217,58 @@ template <typename E, E V>
[[nodiscard]] constexpr auto n() noexcept { [[nodiscard]] constexpr auto n() noexcept {
static_assert(std::is_enum_v<E>, "nameof::detail::nameof_enum requires enum type."); static_assert(std::is_enum_v<E>, "nameof::detail::nameof_enum requires enum type.");
#if defined(__clang__) || defined(__GNUC__) && __GNUC__ >= 9 #if defined(__clang__) || defined(__GNUC__) && __GNUC__ >= 9
return nameof({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2}); constexpr auto name = nameof({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2});
#elif defined(_MSC_VER) #elif defined(_MSC_VER)
return nameof({__FUNCSIG__, sizeof(__FUNCSIG__) - 17}); constexpr auto name = nameof({__FUNCSIG__, sizeof(__FUNCSIG__) - 17});
#else #else
return std::string_view{}; // Unsupported compiler. return std::string_view{}; // Unsupported compiler.
#endif #endif
#if defined(__clang__) || defined(__GNUC__) && __GNUC__ >= 9 || defined(_MSC_VER)
return static_string<name.size()>{name};
#endif
} }
template <typename E, E V>
inline constexpr auto nameof_enum_v = n<E, V>();
template <typename E, int O, int... I> template <typename E, int O, int... I>
[[nodiscard]] constexpr auto enum_names(std::integer_sequence<int, I...>) noexcept { [[nodiscard]] constexpr auto enum_names(std::integer_sequence<int, I...>) noexcept {
static_assert(std::is_enum_v<E>, "nameof::detail::enum_names requires enum type."); static_assert(std::is_enum_v<E>, "nameof::detail::enum_names requires enum type.");
return std::array<std::string_view, sizeof...(I)>{{n<E, static_cast<E>(I + O)>()...}}; return std::array<std::string_view, sizeof...(I)>{{nameof_enum_v<E, static_cast<E>(I + O)>...}};
} }
template <typename... T> template <typename... T>
[[nodiscard]] constexpr auto n() noexcept { [[nodiscard]] constexpr auto n() noexcept {
#if defined(__clang__) #if defined(__clang__)
return std::string_view{__PRETTY_FUNCTION__ + 31, sizeof(__PRETTY_FUNCTION__) - 34}; constexpr std::string_view name{__PRETTY_FUNCTION__ + 31, sizeof(__PRETTY_FUNCTION__) - 34};
#elif defined(__GNUC__) #elif defined(__GNUC__)
return std::string_view{__PRETTY_FUNCTION__ + 46, sizeof(__PRETTY_FUNCTION__) - 49}; constexpr std::string_view name{__PRETTY_FUNCTION__ + 46, sizeof(__PRETTY_FUNCTION__) - 49};
#elif defined(_MSC_VER) #elif defined(_MSC_VER)
return std::string_view{__FUNCSIG__ + 63, sizeof(__FUNCSIG__) - 81 - (__FUNCSIG__[sizeof(__FUNCSIG__) - 19] == ' ' ? 1 : 0)}; constexpr std::string_view name{__FUNCSIG__ + 63, sizeof(__FUNCSIG__) - 81 - (__FUNCSIG__[sizeof(__FUNCSIG__) - 19] == ' ' ? 1 : 0)};
#else #else
return std::string_view{}; // Unsupported compiler. return std::string_view{}; // Unsupported compiler.
#endif #endif
#if defined(__clang__) || defined(__GNUC__) || defined(_MSC_VER)
return static_string<name.size()>{name};
#endif
} }
#if defined(_MSC_VER)
template <typename U, typename T = identity<U>>
#else
template <typename T>
#endif
inline constexpr auto nameof_type_v = n<T>();
} // namespace nameof::detail } // namespace nameof::detail
// Checks is nameof_type supported compiler.
inline constexpr auto is_nameof_type_supported = detail::nameof_type_supported<void>::value; inline constexpr auto is_nameof_type_supported = detail::nameof_type_supported<void>::value;
// Checks is nameof_enum supported compiler.
inline constexpr auto is_nameof_enum_supported = detail::nameof_enum_supported<void>::value; inline constexpr auto is_nameof_enum_supported = detail::nameof_enum_supported<void>::value;
// Obtains simple (unqualified) string enum name of enum variable. // Obtains simple (unqualified) string enum name of enum variable.
@ -260,25 +300,21 @@ template <auto V>
static_assert(detail::nameof_enum_supported<D>::value, "nameof::nameof_enum: Unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility)."); static_assert(detail::nameof_enum_supported<D>::value, "nameof::nameof_enum: Unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
static_assert(std::is_enum_v<D>, "nameof::nameof_enum requires enum type."); static_assert(std::is_enum_v<D>, "nameof::nameof_enum requires enum type.");
return detail::n<D, V>(); return detail::nameof_enum_v<D, V>;
}
// Obtains string name of full type, with reference and cv-qualifiers.
template <typename T>
[[nodiscard]] constexpr std::string_view nameof_full_type() noexcept {
static_assert(detail::nameof_type_supported<T>::value, "nameof::nameof_type: Unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
#if defined(_MSC_VER)
return detail::n<detail::identity<T>>();
#else
return detail::n<T>();
#endif
} }
// Obtains string name of type, reference and cv-qualifiers are ignored. // Obtains string name of type, reference and cv-qualifiers are ignored.
template <typename T> template <typename T>
[[nodiscard]] constexpr std::string_view nameof_type() noexcept { [[nodiscard]] constexpr std::string_view nameof_type() noexcept {
static_assert(detail::nameof_type_supported<T>::value, "nameof::nameof_type: Unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility)."); static_assert(detail::nameof_type_supported<T>::value, "nameof::nameof_type: Unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
return nameof_full_type<detail::remove_cvref_t<T>>(); return detail::nameof_type_v<detail::remove_cvref_t<T>>;
}
// Obtains string name of full type, with reference and cv-qualifiers.
template <typename T>
[[nodiscard]] constexpr std::string_view nameof_full_type() noexcept {
static_assert(detail::nameof_type_supported<T>::value, "nameof::nameof_type: Unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
return detail::nameof_type_v<T>;
} }
} // namespace nameof } // namespace nameof