std::pointer_traits::pointer_to
From cppreference.com
< cpp | memory | pointer traits
| Defined in header
<memory>
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||
| static pointer pointer_to( element_type& r );
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(1) | (since C++11) (member of pointer_traits<Ptr> specialization) |
| static pointer pointer_to( element_type& r );
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(2) | (since C++11) (member of pointer_traits<T*> specialization) |
Constructs a dereferenceable pointer to its argument.
1) The version of this function in the non-specialized std::pointer_traits template simply calls Ptr::pointer_to(r), and if Ptr does not provide a static member function
pointer_to, instantiation of this function is a compile-time error.
2) The version of this function in the specialization of std::pointer_traits for pointer types returns std::addressof(r)
Contents |
[edit] Parameters
| r | - | reference to an object of type element_type&, except if element_type is void, in which case the type of r is unspecified
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[edit] Return value
A dereferenceable pointer to r, of the type pointer_traits<>::pointer.
[edit] Exceptions
1) Unspecified (typically same as Ptr::pointer_to)
2)
noexcept specification:
noexcept
[edit] Notes
The boost library version of this function returns pointer(std::addressof(r)) if Ptr::pointer_to does not exist.
[edit] See also
| (C++11)
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obtains actual address of an object, even if the & operator is overloaded (function template) |
| obtains the address of an object, even if operator& is overloaded (public member function of std::allocator)
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