30 lines
609 B
C++
30 lines
609 B
C++
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#ifndef RFL_INTERNAL_ELEMENT_INDEX_HPP_
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#define RFL_INTERNAL_ELEMENT_INDEX_HPP_
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#include <type_traits>
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namespace rfl::internal {
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template <int _i, class T>
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consteval int find_element_index() {
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return -1;
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}
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template <int _i, class T, class Head, class... Tail>
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consteval int find_element_index() {
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if constexpr (std::is_same_v<T, Head>) {
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return _i;
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} else {
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return find_element_index<_i + 1, T, Tail...>();
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}
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}
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template <class T, class... AlternativeTypes>
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consteval int element_index() {
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return find_element_index<0, T, AlternativeTypes...>();
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}
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} // namespace rfl::internal
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#endif
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