40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
#ifndef RFL_INTERNAL_NO_DUPLICATE_FIELD_NAMES_HPP_
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#define RFL_INTERNAL_NO_DUPLICATE_FIELD_NAMES_HPP_
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#include <tuple>
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namespace rfl {
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namespace internal {
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template <class Fields, int _i = 1, int _j = 0>
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constexpr inline bool no_duplicate_field_names() {
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constexpr auto num_fields = std::tuple_size_v<Fields>;
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if constexpr (num_fields <= 1) {
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return true;
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} else {
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if constexpr (_i == num_fields) {
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return true;
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} else if constexpr (_j == -1) {
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return no_duplicate_field_names<Fields, _i + 1, _i>();
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} else {
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using FieldType1 = std::remove_cvref_t<typename std::tuple_element<_i, Fields>::type>;
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using FieldType2 = std::remove_cvref_t<typename std::tuple_element<_j, Fields>::type>;
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constexpr auto field_name_i = FieldType1::name_;
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constexpr auto field_name_j = FieldType2::name_;
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constexpr bool no_duplicate = (field_name_i != field_name_j);
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static_assert(no_duplicate, "Duplicate field names are not allowed");
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return no_duplicate && no_duplicate_field_names<Fields, _i, _j - 1>();
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}
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}
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}
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} // namespace internal
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} // namespace rfl
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#endif
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