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fix enum_to_string_impl

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This commit is contained in:
terik23 2019-04-02 00:25:50 +05:00
parent 00ae62deae
commit 7a56aee1d5
1 changed files with 19 additions and 19 deletions
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38
include/magic_enum.hpp
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@ -56,9 +56,9 @@ namespace detail {
return (!front && c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_';
}
template <auto V>
template <typename E, E V>
[[nodiscard]] constexpr std::optional<std::string_view> enum_to_string_impl() noexcept {
static_assert(std::is_enum_v<decltype(V)>, "magic_enum::enum_to_string require enum type.");
static_assert(std::is_enum_v<E>, "magic_enum::enum_to_string require enum type.");
#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ >= 9)
std::string_view name{__PRETTY_FUNCTION__};
constexpr auto suffix = sizeof("]") - 1;
@ -96,21 +96,21 @@ struct enum_to_string_impl_t final {
switch (value - V) {
case 0:
return enum_to_string_impl<static_cast<E>(V)>();
return enum_to_string_impl<E, static_cast<E>(V)>();
case 1:
return enum_to_string_impl<static_cast<E>(V + 1)>();
return enum_to_string_impl<E, static_cast<E>(V + 1)>();
case 2:
return enum_to_string_impl<static_cast<E>(V + 2)>();
return enum_to_string_impl<E, static_cast<E>(V + 2)>();
case 3:
return enum_to_string_impl<static_cast<E>(V + 3)>();
return enum_to_string_impl<E, static_cast<E>(V + 3)>();
case 4:
return enum_to_string_impl<static_cast<E>(V + 4)>();
return enum_to_string_impl<E, static_cast<E>(V + 4)>();
case 5:
return enum_to_string_impl<static_cast<E>(V + 5)>();
return enum_to_string_impl<E, static_cast<E>(V + 5)>();
case 6:
return enum_to_string_impl<static_cast<E>(V + 6)>();
return enum_to_string_impl<E, static_cast<E>(V + 6)>();
case 7:
return enum_to_string_impl<static_cast<E>(V + 7)>();
return enum_to_string_impl<E, static_cast<E>(V + 7)>();
default:
return enum_to_string_impl_t<E, V + 8>{}(value);
}
@ -133,21 +133,21 @@ struct enum_from_string_impl_t final {
return std::nullopt; // Enum variable out of range.
}
if (enum_to_string_impl<static_cast<E>(V)>() == name) {
if (enum_to_string_impl<E, static_cast<E>(V)>() == name) {
return static_cast<E>(V);
} else if (enum_to_string_impl<static_cast<E>(V + 1)>() == name) {
} else if (enum_to_string_impl<E, static_cast<E>(V + 1)>() == name) {
return static_cast<E>(V + 1);
} else if (enum_to_string_impl<static_cast<E>(V + 2)>() == name) {
} else if (enum_to_string_impl<E, static_cast<E>(V + 2)>() == name) {
return static_cast<E>(V + 2);
} else if (enum_to_string_impl<static_cast<E>(V + 3)>() == name) {
} else if (enum_to_string_impl<E, static_cast<E>(V + 3)>() == name) {
return static_cast<E>(V + 3);
} else if (enum_to_string_impl<static_cast<E>(V + 4)>() == name) {
} else if (enum_to_string_impl<E, static_cast<E>(V + 4)>() == name) {
return static_cast<E>(V + 4);
} else if (enum_to_string_impl<static_cast<E>(V + 5)>() == name) {
} else if (enum_to_string_impl<E, static_cast<E>(V + 5)>() == name) {
return static_cast<E>(V + 5);
} else if (enum_to_string_impl<static_cast<E>(V + 6)>() == name) {
} else if (enum_to_string_impl<E, static_cast<E>(V + 6)>() == name) {
return static_cast<E>(V + 6);
} else if (enum_to_string_impl<static_cast<E>(V + 7)>() == name) {
} else if (enum_to_string_impl<E, static_cast<E>(V + 7)>() == name) {
return static_cast<E>(V + 7);
} else {
return enum_from_string_impl_t<E, V + 8>{}(name);
@ -179,7 +179,7 @@ template <typename T, typename = std::enable_if_t<std::is_enum_v<std::decay_t<T>
// enum_to_string<enum>() used to obtain string enum name from static storage enum variable
template <auto V, typename = std::enable_if_t<std::is_enum_v<std::decay_t<decltype(V)>>>>
[[nodiscard]] constexpr std::optional<std::string_view> enum_to_string() noexcept {
return detail::enum_to_string_impl<V>();
return detail::enum_to_string_impl<decltype(V), V>();
}
// enum_from_string(name) used to obtain enum variable from enum string name.