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change check support compiler

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neargye 2019-10-02 15:28:53 +05:00
parent 75c9d9bce5
commit c947afdbae
2 changed files with 25 additions and 23 deletions
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6
example/example.cpp
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@ -33,7 +33,7 @@ int main() {
std::cout << c1_name << std::endl; // RED std::cout << c1_name << std::endl; // RED
// String enum name sequence. // String enum name sequence.
constexpr auto& color_names = magic_enum::enum_names<Color>(); constexpr auto color_names = magic_enum::enum_names<Color>();
std::cout << "Color names:"; std::cout << "Color names:";
for (auto n : color_names) { for (auto n : color_names) {
std::cout << " " << n; std::cout << " " << n;
@ -70,7 +70,7 @@ int main() {
std::cout << "Color[0] = " << magic_enum::enum_value<Color>(0) << std::endl; // Color[0] = RED std::cout << "Color[0] = " << magic_enum::enum_value<Color>(0) << std::endl; // Color[0] = RED
// Enum value sequence. // Enum value sequence.
constexpr auto& colors = magic_enum::enum_values<Color>(); constexpr auto colors = magic_enum::enum_values<Color>();
std::cout << "Colors sequence:"; std::cout << "Colors sequence:";
for (Color c : colors) { for (Color c : colors) {
std::cout << " " << c; // ostream operator for enum. std::cout << " " << c; // ostream operator for enum.
@ -106,7 +106,7 @@ int main() {
// Enum pair (value enum, string enum name) sequence. // Enum pair (value enum, string enum name) sequence.
constexpr auto color_entries = magic_enum::enum_entries<Color>(); constexpr auto color_entries = magic_enum::enum_entries<Color>();
std::cout << "Colors entries:"; std::cout << "Colors entries:";
for (auto& e : color_entries) { for (auto e : color_entries) {
std::cout << " " << e.second << " = " << static_cast<int>(e.first); std::cout << " " << e.second << " = " << static_cast<int>(e.first);
} }
std::cout << std::endl; std::cout << std::endl;

42
include/magic_enum.hpp
View file

@ -56,6 +56,10 @@
namespace magic_enum { namespace magic_enum {
#if defined(__clang__) || defined(__GNUC__) && __GNUC__>= 9 || defined(_MSC_VER)
# define MAGIC_ENUM_SUPPORTED 1
#endif
// Enum value must be in range [MAGIC_ENUM_RANGE_MIN, MAGIC_ENUM_RANGE_MAX]. By default MAGIC_ENUM_RANGE_MIN = -128, MAGIC_ENUM_RANGE_MAX = 128. // Enum value must be in range [MAGIC_ENUM_RANGE_MIN, MAGIC_ENUM_RANGE_MAX]. By default MAGIC_ENUM_RANGE_MIN = -128, MAGIC_ENUM_RANGE_MAX = 128.
// If need another range for all enum types by default, redefine the macro MAGIC_ENUM_RANGE_MIN and MAGIC_ENUM_RANGE_MAX. // If need another range for all enum types by default, redefine the macro MAGIC_ENUM_RANGE_MIN and MAGIC_ENUM_RANGE_MAX.
// If need another range for specific enum type, add specialization enum_range for necessary enum type. // If need another range for specific enum type, add specialization enum_range for necessary enum type.
@ -79,7 +83,7 @@ namespace detail {
template <typename T> template <typename T>
struct supported final struct supported final
#if defined(__clang__) || defined(__GNUC__) && __GNUC__>= 9 || defined(_MSC_VER) || defined(MAGIC_ENUM_NO_CHECK_SUPPORT) #if defined(MAGIC_ENUM_SUPPORTED) && MAGIC_ENUM_SUPPORTED
: std::true_type {}; : std::true_type {};
#else #else
: std::false_type {}; : std::false_type {};
@ -139,20 +143,19 @@ constexpr std::string_view pretty_name(std::string_view name) noexcept {
template <typename E> template <typename E>
constexpr auto n() noexcept { constexpr auto n() noexcept {
static_assert(is_enum_v<E>, "magic_enum::detail::n requires enum type."); static_assert(is_enum_v<E>, "magic_enum::detail::n requires enum type.");
#if defined(__clang__) #if defined(MAGIC_ENUM_SUPPORTED) && MAGIC_ENUM_SUPPORTED
# if defined(__clang__)
constexpr std::string_view name{__PRETTY_FUNCTION__ + 34, sizeof(__PRETTY_FUNCTION__) - 36}; constexpr std::string_view name{__PRETTY_FUNCTION__ + 34, sizeof(__PRETTY_FUNCTION__) - 36};
#elif defined(__GNUC__) # elif defined(__GNUC__)
constexpr std::string_view name{__PRETTY_FUNCTION__ + 49, sizeof(__PRETTY_FUNCTION__) - 51}; constexpr std::string_view name{__PRETTY_FUNCTION__ + 49, sizeof(__PRETTY_FUNCTION__) - 51};
#elif defined(_MSC_VER) # elif defined(_MSC_VER)
constexpr std::string_view name{__FUNCSIG__ + 40, sizeof(__FUNCSIG__) - 57}; constexpr std::string_view name{__FUNCSIG__ + 40, sizeof(__FUNCSIG__) - 57};
# endif
return static_string<name.size()>{name};
#else
static_assert(supported<E>::value, "magic_enum: Unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
return std::string_view{}; // Unsupported compiler.
#endif #endif
if constexpr (supported<E>::value) {
return static_string<name.size()>{name};
} else {
static_assert(supported<E>::value, "magic_enum: Unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
return std::string_view{}; // Unsupported compiler.
}
} }
template <typename E> template <typename E>
@ -161,18 +164,17 @@ inline constexpr auto type_name_v = n<E>();
template <typename E, E V> template <typename E, E V>
constexpr auto n() noexcept { constexpr auto n() noexcept {
static_assert(is_enum_v<E>, "magic_enum::detail::n requires enum type."); static_assert(is_enum_v<E>, "magic_enum::detail::n requires enum type.");
#if defined(__clang__) || defined(__GNUC__) #if defined(MAGIC_ENUM_SUPPORTED) && MAGIC_ENUM_SUPPORTED
# if defined(__clang__) || defined(__GNUC__)
constexpr auto name = pretty_name({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2}); constexpr auto name = pretty_name({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2});
#elif defined(_MSC_VER) # elif defined(_MSC_VER)
constexpr auto name = pretty_name({__FUNCSIG__, sizeof(__FUNCSIG__) - 17}); constexpr auto name = pretty_name({__FUNCSIG__, sizeof(__FUNCSIG__) - 17});
# endif
return static_string<name.size()>{name};
#else
static_assert(supported<E>::value, "magic_enum: Unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
return std::string_view{}; // Unsupported compiler.
#endif #endif
if constexpr (supported<E>::value) {
return static_string<name.size()>{name};
} else {
static_assert(supported<E>::value, "magic_enum: Unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
return std::string_view{}; // Unsupported compiler.
}
} }
template <typename E, E V> template <typename E, E V>