std::pointer_traits<Ptr>::pointer_to

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std::pointer_traits

Member functions
pointer_traits::pointer_to (C++11)
pointer_traits::to_address (C++20)(optional)

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Defined in header`<memory>`
static pointer pointer_to( element_type& r);	(1)	(since C++11) (member of`pointer_traits<Ptr>` specialization)
	(2)
static pointer pointer_to( element_type& r)noexcept;			(since C++11) (until C++20) (member of`pointer_traits<T*>` specialization)
staticconstexpr pointer pointer_to( element_type& r)noexcept;			(since C++20) (member of`pointer_traits<T*>` specialization)

Constructs a dereferenceable pointer or pointer-like object ("fancy pointer") to its argument.

1) The version of this function in the non-specializedstd::pointer_traits template simply callsPtr::pointer_to(r), and if Ptr does not provide a static member functionpointer_to, instantiation of this function is a compile-time error.

2) The version of this function in the specialization ofstd::pointer_traits for pointer types returnsstd::addressof(r).

[edit]Parameters

r - reference to an object of typeelement_type&, except if element_type isvoid, in which case the type ofr is unspecified

[edit]Return value

A dereferenceable pointer tor, of the typepointer_traits<>::pointer.

[edit]Exceptions

1) Unspecified (typically same asPtr::pointer_to).

[edit]Notes

TheBoost.Intrusive library version of this function returnspointer(std::addressof(r)) ifPtr::pointer_to does not exist.

[edit]See also

addressof (C++11)	obtains actual address of an object, even if the`&` operator is overloaded (function template)[edit]
address (until C++20)	obtains the address of an object, even ifoperator& is overloaded (public member function of`std::allocator<T>`)[edit]
to_address [static](C++20)(optional)	obtains a raw pointer from a fancy pointer (inverse of`pointer_to`) (public static member function)[edit]
to_address (C++20)	obtains a raw pointer from a pointer-like type (function template)[edit]

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std::pointer_traits<Ptr>::pointer_to

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