sha512sum/nameof_module
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

fixs

Browse source
This commit is contained in:
terik23 2019-07-13 19:32:33 +05:00
parent 9d1bce7b9d
commit c1a9e49d64
1 changed files with 48 additions and 56 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

104
include/nameof.hpp
View file

@ -58,67 +58,13 @@ namespace nameof {
template <typename E> template <typename E>
struct enum_range final { struct enum_range final {
static_assert(std::is_enum_v<E>, "nameof::enum_range requires enum type."); static_assert(std::is_enum_v<E>, "nameof::enum_range requires enum type.");
static constexpr int min = std::is_signed_v<std::underlying_type_t<E>> ? NAMEOF_ENUM_RANGE_MIN : 0; static constexpr int min = NAMEOF_ENUM_RANGE_MIN;
static constexpr int max = NAMEOF_ENUM_RANGE_MAX; static constexpr int max = NAMEOF_ENUM_RANGE_MAX;
static_assert(max > min, "nameof::enum_range requires max > min."); static_assert(max > min, "nameof::enum_range requires max > min.");
}; };
namespace detail { namespace detail {
template <typename T>
struct identity final {
using type = T;
};
template <typename... T>
[[nodiscard]] constexpr std::string_view nameof_type_impl() noexcept {
#if defined(__clang__)
constexpr std::string_view name{__PRETTY_FUNCTION__ + 83, sizeof(__PRETTY_FUNCTION__) - 87};
#elif defined(__GNUC__)
constexpr std::string_view name{__PRETTY_FUNCTION__ + 98, sizeof(__PRETTY_FUNCTION__) - 151};
#elif defined(_MSC_VER)
constexpr std::string_view name{__FUNCSIG__ + 139, sizeof(__FUNCSIG__) - 157};
#else
return {}; // Unsupported compiler.
#endif
#if defined(__clang__) || defined(__GNUC__) || defined(_MSC_VER)
return name.substr(0, name.length() - (name.back() == ' ' ? 1 : 0));
#endif
}
template <typename E, E V>
[[nodiscard]] constexpr std::string_view nameof_enum_impl() noexcept {
static_assert(std::is_enum_v<E>, "nameof::nameof_enum_impl requires enum type.");
#if defined(__clang__)
constexpr std::string_view name{__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2};
#elif defined(__GNUC__) && __GNUC__ >= 9
constexpr std::string_view name{__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 51};
#elif defined(_MSC_VER)
constexpr std::string_view name{__FUNCSIG__, sizeof(__FUNCSIG__) - 17};
#else
return {}; // Unsupported compiler.
#endif
#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ >= 9) || defined(_MSC_VER)
constexpr auto prefix = name.find_last_of(" :,-)") + 1;
if constexpr (name[prefix] >= '0' && name[prefix] <= '9') {
return {}; // Value does not have name.
} else {
return name.substr(prefix, name.length() - prefix);
}
#endif
}
template <typename E, int O, int... I>
[[nodiscard]] constexpr auto enum_names_impl(std::integer_sequence<int, I...>) noexcept {
static_assert(std::is_enum_v<E>, "nameof::detail::enum_names_impl requires enum type.");
constexpr std::array<std::string_view, sizeof...(I)> names{{nameof_enum_impl<E, static_cast<E>(I + O)>()...}};
return names;
}
template <typename T> template <typename T>
struct check final { struct check final {
using type = void; using type = void;
@ -213,6 +159,52 @@ template <typename T>
return name; return name;
} }
template <typename E, E V>
[[nodiscard]] constexpr std::string_view nameof_enum_impl() noexcept {
static_assert(std::is_enum_v<E>, "nameof::nameof_enum_impl requires enum type.");
#if defined(__clang__)
constexpr auto name = nameof_impl<void>({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2}, false);
#elif defined(__GNUC__) && __GNUC__ >= 9
constexpr auto name = nameof_impl<void>({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 51}, false);
#elif defined(_MSC_VER)
constexpr auto name = nameof_impl<void>({__FUNCSIG__, sizeof(__FUNCSIG__) - 17}, false);
#else
constexpr std::string_view name; // Unsupported compiler.
#endif
return name;
}
template <typename E, int O, int... I>
[[nodiscard]] constexpr auto enum_names_impl(std::integer_sequence<int, I...>) noexcept {
static_assert(std::is_enum_v<E>, "nameof::detail::enum_names_impl requires enum type.");
constexpr std::array<std::string_view, sizeof...(I)> names{{nameof_enum_impl<E, static_cast<E>(I + O)>()...}};
return names;
}
template <typename T>
struct identity final {
using type = T;
};
template <typename... T>
[[nodiscard]] constexpr std::string_view nameof_type_impl() noexcept {
#if defined(__clang__)
constexpr std::string_view name{__PRETTY_FUNCTION__ + 83, sizeof(__PRETTY_FUNCTION__) - 87};
#elif defined(__GNUC__)
constexpr std::string_view name{__PRETTY_FUNCTION__ + 98, sizeof(__PRETTY_FUNCTION__) - 151};
#elif defined(_MSC_VER)
constexpr std::string_view name{__FUNCSIG__ + 139, sizeof(__FUNCSIG__) - 157};
#else
return {}; // Unsupported compiler.
#endif
#if defined(__clang__) || defined(__GNUC__) || defined(_MSC_VER)
return name.substr(0, name.length() - (name.back() == ' ' ? 1 : 0));
#endif
}
} // namespace nameof::detail } // namespace nameof::detail
// Obtains simple (unqualified) string enum name of enum variable. // Obtains simple (unqualified) string enum name of enum variable.
@ -228,7 +220,7 @@ template <typename E>
constexpr auto names = detail::enum_names_impl<D, min>(range); constexpr auto names = detail::enum_names_impl<D, min>(range);
if (int i = static_cast<int>(value) - min; i >= 0 && static_cast<std::size_t>(i) < names.size()) { if (int i = static_cast<int>(value) - min; i >= 0 && static_cast<std::size_t>(i) < names.size()) {
return names[i]; return names[static_cast<std::size_t>(i)];
} else { } else {
return {}; // Value out of range. return {}; // Value out of range.
} }