std:: nontype, std:: nontype_t

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C++
Utilities library
General utilities
Relational operators (deprecated in C++20)
Function objects
Function invocation
(C++17) (C++23)
Identity function object
(C++20)
Old binders and adaptors
( until C++17* )
( until C++17* )
( until C++17* )
( until C++17* )
( until C++17* )
( until C++17* )
( until C++17* ) ( until C++17* ) ( until C++17* ) ( until C++17* )
( until C++20* )
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( until C++17* ) ( until C++17* )
( until C++17* ) ( until C++17* )

( until C++17* )
( until C++17* ) ( until C++17* ) ( until C++17* ) ( until C++17* )
( until C++20* )
( until C++20* )
Defined in header <utility>
template < auto V >
struct nontype_t { explicit nontype_t ( ) = default ; } ;
(1) (since C++26)
template < auto V >
constexpr std :: nontype_t < V > nontype { } ;
(2) (since C++26)
1) The class template std::nontype_t can be used in the constructor's parameter list to match the intended tag.
2) The corresponding std::nontype instance of (1) is a disambiguation argument tag that can be passed to the constructors of std:: function_ref to indicate that the contained object should be constructed with the value of the non-type template parameter V .

Template parameters

V - non-type template parameter of a structural type .

See also

(C++26)
non-owning wrapper of any callable object
(class template)
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