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clean-up

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neargye 2019-04-11 15:37:44 +05:00
parent 0c1128947b
commit 54fbc2de95
1 changed files with 11 additions and 22 deletions
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33
include/magic_enum.hpp
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@ -95,38 +95,27 @@ template <typename E, typename U = std::underlying_type_t<E>>
return range;
}
[[nodiscard]] constexpr bool is_name_char(char c, bool front) noexcept {
return (!front && c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_';
}
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__)
std::string_view name{__PRETTY_FUNCTION__};
constexpr std::string_view name{__PRETTY_FUNCTION__};
constexpr auto suffix = sizeof("]") - 1;
#elif defined(__GNUC__) && __GNUC__ >= 9
std::string_view name{__PRETTY_FUNCTION__};
constexpr std::string_view name{__PRETTY_FUNCTION__};
constexpr auto suffix = sizeof("; std::string_view = std::basic_string_view<char>]") - 1;
#elif defined(_MSC_VER)
std::string_view name{__FUNCSIG__};
constexpr std::string_view name{__FUNCSIG__};
constexpr auto suffix = sizeof(">(void) noexcept") - 1;
#else
return {}; // Unsupported compiler.
#endif
#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ >= 9) || defined(_MSC_VER)
name.remove_suffix(suffix);
for (std::size_t i = name.size(); i > 0; --i) {
if (!is_name_char(name[i - 1], false)) {
name.remove_prefix(i);
break;
}
}
constexpr auto prefix = name.find_last_of(" :,-)", name.length() - suffix) + 1;
if (name.length() > 0 && is_name_char(name.front(), true)) {
return name;
if ((name[prefix] >= 'a' && name[prefix] <= 'z') || (name[prefix] >= 'A' && name[prefix] <= 'Z')) {
return name.substr(prefix, name.size() - prefix - suffix);
} else {
return {}; // Value does not have name.
}
@ -161,21 +150,21 @@ template <typename E, int... I>
constexpr std::array<bool, n> valid{{!name_impl<E, static_cast<E>(I + min_impl<E>())>().empty()...}};
constexpr int num_valid = ((valid[I] ? 1 : 0) + ...);
std::array<E, num_valid> enums{};
std::array<E, num_valid> values{};
for (int i = 0, v = 0; i < n && v < num_valid; ++i) {
if (valid[i]) {
enums[v++] = static_cast<E>(i + min_impl<E>());
values[v++] = static_cast<E>(i + min_impl<E>());
}
}
return enums;
return values;
}
template <typename E, std::size_t... I>
[[nodiscard]] constexpr decltype(auto) names_impl(std::integer_sequence<std::size_t, I...>) noexcept {
static_assert(std::is_enum_v<E>, "magic_enum::detail::names_impl requires enum type.");
constexpr auto enums = values_impl<E>(range_impl<E>());
constexpr std::array<std::string_view, sizeof...(I)> names{{name_impl<E, enums[I]>()...}};
constexpr auto values = values_impl<E>(range_impl<E>());
constexpr std::array<std::string_view, sizeof...(I)> names{{name_impl<E, values[I]>()...}};
return names;
}