deductionguidesforstd::pair (3) - Linux Manuals

deductionguidesforstd::pair: deductionguidesforstd::pair


deductionguidesforstd::pair - deductionguidesforstd::pair


Defined in header <utility>
template<class T1, class T2> (since C++17)
pair(T1, T2) -> pair<T1, T2>;

One deduction_guide is provided for std::pair to account for the edge cases missed by the implicit deduction guides.
In particular, non-copyable arguments and array to pointer conversion


// Run this code

  #include <utility>

  int main()
      int a[2], b[3];
      std::pair p{a, b}; // explicit deduction guide is used in this case