45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
#ifndef RFL_REPLACE_HPP_
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#define RFL_REPLACE_HPP_
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#include <type_traits>
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#include "from_named_tuple.hpp"
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namespace rfl {
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/// Replaces one or several fields, returning a new version
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/// with the non-replaced fields left unchanged.
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template <class T, class RField, class... OtherRFields>
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auto replace(T&& _t, RField&& _field, OtherRFields&&... _other_fields) {
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if constexpr (internal::is_named_tuple_v<T>) {
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return std::forward<T>(_t).replace(
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to_named_tuple(std::forward<RField>(_field)),
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to_named_tuple(std::forward<OtherRFields>(_other_fields))...);
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} else {
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return from_named_tuple<T>(
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to_named_tuple(std::forward<T>(_t))
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.replace(to_named_tuple(std::forward<RField>(_field)),
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to_named_tuple(
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std::forward<OtherRFields>(_other_fields))...));
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}
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}
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/// Replaces one or several fields, returning a new version
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/// with the non-replaced fields left unchanged.
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template <class T, class RField, class... OtherRFields>
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auto replace(const T& _t, RField&& _field, OtherRFields&&... _other_fields) {
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if constexpr (internal::is_named_tuple_v<T>) {
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return _t.replace(
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to_named_tuple(std::forward<RField>(_field)),
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to_named_tuple(std::forward<OtherRFields>(_other_fields))...);
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} else {
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return from_named_tuple<T>(to_named_tuple(_t).replace(
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to_named_tuple(std::forward<RField>(_field)),
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to_named_tuple(std::forward<OtherRFields>(_other_fields))...));
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}
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}
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} // namespace rfl
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#endif
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