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tuple-like, pair-like cppreference.com
cppreference.com

tuple-like, pair-like

cppreference.com
 
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std::tuple
 
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template< class T > concept tuple-like = /* */;
 (1) ( C++23)
( *)
template< class T > concept pair-like = tuple-like<T> && std::tuple_size_v<std::remove_cvref_t<T>> == 2;
 (2) ( C++23)
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1) T tuple-like, std::remove_cvref_t<T>
2) pair-like tuple-like, 2 .

tuple-like , .. std::get, std::tuple_element std::tuple_size.

tuple-like .

tuple-like pair-like :

tuple
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tuple
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 tuple tuple-like
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 tuple tuple-like
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 tuple,
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 subrange pair-like
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 view, tuple-like , N, view N
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