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fix Argument-dependent lookup results in enum_switch

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neargye 2023-10-04 19:14:27 +04:00
parent dfcd851dba
commit d67973d118
1 changed files with 1 additions and 10 deletions
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11
include/magic_enum_switch.hpp
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@ -101,22 +101,13 @@ inline constexpr auto default_result_type_lambda = []() noexcept(std::is_nothrow
template <>
inline constexpr auto default_result_type_lambda<void> = []() noexcept {};
template <typename R, typename F, typename... Args>
constexpr R invoke_r(F&& f, Args&&... args) noexcept(std::is_nothrow_invocable_r_v<R, F, Args...>) {
if constexpr (std::is_void_v<R>) {
std::forward<F>(f)(std::forward<Args>(args)...);
} else {
return static_cast<R>(std::forward<F>(f)(std::forward<Args>(args)...));
}
}
template <std::size_t I, std::size_t End, typename R, typename E, enum_subtype S, typename F, typename Def>
constexpr decltype(auto) constexpr_switch_impl(F&& f, E value, Def&& def) {
if constexpr(I < End) {
constexpr auto v = enum_constant<enum_value<E, I, S>()>{};
if (value == v) {
if constexpr (std::is_invocable_r_v<R, F, decltype(v)>) {
return invoke_r<R>(std::forward<F>(f), v);
return static_cast<R>(std::forward<F>(f)(v));
} else {
return def();
}