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deductionguidesforstd::reference_wrapper(3) C++ Standard Libary deductionguidesforstd::reference_wrapper(3)


deductionguidesforstd::reference_wrapper - deductionguidesforstd::reference_wrapper


Defined in header <functional>
template<typename T> (since C++17)
reference_wrapper(T&) -> reference_wrapper<T>;

One deduction guide is provided for std::reference_wrapper to support deduction of
the sole class template parameter.


This section is incomplete
Reason: no example

Defect reports

The following behavior-changing defect reports were applied retroactively to
previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 2981 C++17 a redundant deduction guide from removed
reference_wrapper<T> was provided
LWG 2993 C++17 defect resolution removed a constructor added deduction guide
used for class template argument deduction to compensate