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remove union type, simplify

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schaumb 2023-06-23 10:58:40 +02:00
parent f2522c2cc0
commit 0b9cbf7dd2
1 changed files with 2 additions and 11 deletions
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13
include/nameof.hpp
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@ -986,16 +986,7 @@ template <typename From, typename Type>
From get_base_type(Type From::*); From get_base_type(Type From::*);
template <typename T> template <typename T>
union union_type { extern T nonexist_object;
constexpr ~union_type() {}
char c = {};
T f;
};
template <typename T>
struct union_type_holder {
constexpr static union_type<T> value;
};
template <auto V> template <auto V>
constexpr auto get_member_name() noexcept { constexpr auto get_member_name() noexcept {
@ -1005,7 +996,7 @@ constexpr auto get_member_name() noexcept {
constexpr bool is_defined = sizeof(decltype(get_base_type(V))) != 0; constexpr bool is_defined = sizeof(decltype(get_base_type(V))) != 0;
static_assert(is_defined, "nameof::nameof_member member name can use only if the struct is already fully defined. Please use NAMEOF macro, or separate definition and declaration."); static_assert(is_defined, "nameof::nameof_member member name can use only if the struct is already fully defined. Please use NAMEOF macro, or separate definition and declaration.");
if constexpr (is_defined) { if constexpr (is_defined) {
return n<V, &(union_type_holder<decltype(get_base_type(V))>::value.f.*V)>(); return n<V, &(nonexist_object.*V)>();
} else { } else {
return ""; return "";
} }