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fix #6

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This commit is contained in:
terik23 2019-07-05 02:59:14 +05:00
parent e2b1301dd8
commit b8f7722a4f
1 changed files with 25 additions and 13 deletions
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38
include/magic_enum.hpp
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@ -99,28 +99,40 @@ template <typename E>
return range;
}
[[nodiscard]] constexpr std::string_view pretty_name(std::string_view name) noexcept {
for (std::size_t i = name.length(); i > 0; --i) {
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] == '_'))) {
name.remove_prefix(i);
break;
}
}
if (name.length() > 0 && ((name.front() >= 'a' && name.front() <= 'z') ||
(name.front() >= 'A' && name.front() <= 'Z') ||
(name.front() == '_'))) {
return name;
} else {
return {}; // Invalid name.
}
}
template <typename E, E V>
[[nodiscard]] constexpr std::string_view name_impl() noexcept {
static_assert(std::is_enum_v<E>, "magic_enum::detail::name_impl requires enum type.");
#if defined(__clang__)
constexpr std::string_view name{__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2};
constexpr auto name = pretty_name({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 2});
#elif defined(__GNUC__) && __GNUC__ >= 9
constexpr std::string_view name{__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 51};
constexpr auto name = pretty_name({__PRETTY_FUNCTION__, sizeof(__PRETTY_FUNCTION__) - 51});
#elif defined(_MSC_VER)
constexpr std::string_view name{__FUNCSIG__, sizeof(__FUNCSIG__) - 17};
constexpr auto name = pretty_name({__FUNCSIG__, sizeof(__FUNCSIG__) - 17});
#else
return {}; // Unsupported compiler.
constexpr std::string_view name; // 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
return name;
}
template <typename E, int... I>