mirror/magic_enum
1
0
Fork 0
mirror of https://github.com/Neargye/magic_enum.git synced 2026-01-10 23:44:29 +00:00
Code Activity

more comfortable static check

Browse source
This commit is contained in:
neargye 2020-10-13 13:29:21 +03:00
parent 8edf2e3286
commit e73c1b1168
1 changed files with 19 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

45
include/magic_enum.hpp
View file

@ -556,31 +556,16 @@ constexpr U value_ors() noexcept {
return value;
}
template <bool, bool, typename T, typename R>
struct enable_if_reflected_enum {};
template <bool, typename T, typename R>
struct enable_if_enum {};
template <typename T, typename R>
struct enable_if_reflected_enum<true, false, T, R> {
struct enable_if_enum<true, T, R> {
using type = R;
using D = std::decay_t<T>;
static_assert(supported<D>::value, "magic_enum unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
static_assert(count_v<D, false> > 0, "magic_enum requires enum implementation and valid max and min.");
};
template <typename T, typename R>
struct enable_if_reflected_enum<true, true, T, R> {
using type = R;
using D = std::decay_t<T>;
static_assert(supported<D>::value, "magic_enum unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
static_assert(count_v<D, true> > 0, "magic_enum::flags requires enum-flags implementation.");
};
template <typename T, typename R = void>
using enable_if_reflected_enum_t = typename enable_if_reflected_enum<std::is_enum_v<std::decay_t<T>>, false, T, R>::type;
template <typename T, typename R = void>
using enable_if_reflected_enum_flags_t = typename enable_if_reflected_enum<std::is_enum_v<std::decay_t<T>>, true, T, R>::type;
template <typename T, typename R = void>
using enable_if_enum_t = std::enable_if_t<std::is_enum_v<std::decay_t<T>>, R>;
@ -658,8 +643,9 @@ template <typename E>
// Returns enum value at specified index.
// No bounds checking is performed: the behavior is undefined if index >= number of enum values.
template <typename E>
[[nodiscard]] constexpr auto enum_value(std::size_t index) noexcept -> detail::enable_if_reflected_enum_t<E, std::decay_t<E>> {
[[nodiscard]] constexpr auto enum_value(std::size_t index) noexcept -> detail::enable_if_enum_t<E, std::decay_t<E>> {
using D = std::decay_t<E>;
static_assert(count_v<D> > 0, "magic_enum requires enum implementation and valid max and min.");
if constexpr (detail::is_sparse_v<D>) {
return assert((index < detail::count_v<D>)), detail::values_v<D>[index];
@ -670,8 +656,9 @@ template <typename E>
// Returns std::array with enum values, sorted by enum value.
template <typename E>
[[nodiscard]] constexpr auto enum_values() noexcept -> detail::enable_if_reflected_enum_t<E, detail::values_t<E>> {
[[nodiscard]] constexpr auto enum_values() noexcept -> detail::enable_if_enum_t<E, detail::values_t<E>> {
using D = std::decay_t<E>;
static_assert(count_v<D> > 0, "magic_enum requires enum implementation and valid max and min.");
return detail::values_v<D>;
}
@ -702,16 +689,18 @@ template <typename E>
// Returns std::array with names, sorted by enum value.
template <typename E>
[[nodiscard]] constexpr auto enum_names() noexcept -> detail::enable_if_reflected_enum_t<E, detail::names_t<E>> {
[[nodiscard]] constexpr auto enum_names() noexcept -> detail::enable_if_enum_t<E, detail::names_t<E>> {
using D = std::decay_t<E>;
static_assert(count_v<D> > 0, "magic_enum requires enum implementation and valid max and min.");
return detail::names_v<D>;
}
// Returns std::array with pairs (value, name), sorted by enum value.
template <typename E>
[[nodiscard]] constexpr auto enum_entries() noexcept -> detail::enable_if_reflected_enum_t<E, detail::entries_t<E>> {
[[nodiscard]] constexpr auto enum_entries() noexcept -> detail::enable_if_enum_t<E, detail::entries_t<E>> {
using D = std::decay_t<E>;
static_assert(count_v<D> > 0, "magic_enum requires enum implementation and valid max and min.");
return detail::entries_v<D>;
}
@ -885,8 +874,9 @@ template <typename E>
// Returns enum-flags value at specified index.
// No bounds checking is performed: the behavior is undefined if index >= number of enum-flags values.
template <typename E>
[[nodiscard]] constexpr auto enum_value(std::size_t index) noexcept -> detail::enable_if_reflected_enum_flags_t<E, std::decay_t<E>> {
[[nodiscard]] constexpr auto enum_value(std::size_t index) noexcept -> detail::enable_if_enum_t<E, std::decay_t<E>> {
using D = std::decay_t<E>;
static_assert(count_v<D, true> > 0, "magic_enum::flags requires enum-flags implementation.");
if constexpr (detail::is_sparse_v<D, true>) {
return assert((index < detail::count_v<D, true>)), detail::values_v<D, true>[index];
@ -899,8 +889,9 @@ template <typename E>
// Returns std::array with enum-flags values, sorted by enum-flags value.
template <typename E>
[[nodiscard]] constexpr auto enum_values() noexcept -> detail::enable_if_reflected_enum_flags_t<E, detail::values_t<E, true>> {
[[nodiscard]] constexpr auto enum_values() noexcept -> detail::enable_if_enum_t<E, detail::values_t<E, true>> {
using D = std::decay_t<E>;
static_assert(count_v<D, true> > 0, "magic_enum::flags requires enum-flags implementation.");
return detail::values_v<D, true>;
}
@ -934,16 +925,18 @@ template <typename E>
// Returns std::array with string names, sorted by enum-flags value.
template <typename E>
[[nodiscard]] constexpr auto enum_names() noexcept -> detail::enable_if_reflected_enum_flags_t<E, detail::names_t<E, true>> {
[[nodiscard]] constexpr auto enum_names() noexcept -> detail::enable_if_enum_t<E, detail::names_t<E, true>> {
using D = std::decay_t<E>;
static_assert(count_v<D, true> > 0, "magic_enum::flags requires enum-flags implementation.");
return detail::names_v<D, true>;
}
// Returns std::array with pairs (value, name), sorted by enum-flags value.
template <typename E>
[[nodiscard]] constexpr auto enum_entries() noexcept -> detail::enable_if_reflected_enum_flags_t<E, detail::entries_t<E, true>> {
[[nodiscard]] constexpr auto enum_entries() noexcept -> detail::enable_if_enum_t<E, detail::entries_t<E, true>> {
using D = std::decay_t<E>;
static_assert(count_v<D, true> > 0, "magic_enum::flags requires enum-flags implementation.");
return detail::entries_v<D, true>;
}