std::experimental::ranges:: make_tagged_pair

From cppreference.com
template < TagSpecifier Tag1, TagSpecifier Tag2, class T1, class T2 >
constexpr ranges:: tagged < /*see below*/ , Tag1, Tag2 > make_tagged_pair ( T1 && x, T2 && y ) ;
(ranges TS)

Convenience function for creating a tagged pair, deducing the element types from the arguments (the tag specifiers must be explicitly specified).

The see below portion of the return type is decltype ( std:: make_pair ( std:: forward < T1 > ( x ) , std:: forward < T2 > ( y ) ) ) .

Return value

R ( std:: forward < T1 > ( x ) , std:: forward < T2 > ( y ) ) , where R is the return type.

See also

specifies that a type represents a tag specifier and its element type
(concept)
augument a tuple-like type with named accessors
(class template)
alias template for a tagged std::pair
(alias template)
alias template for a tagged std::tuple
(alias template)
convenience function for creating a tagged_tuple
(function template)
tag specifiers for use with ranges::tagged
(class)