deduction guides for std::pair
Defined in header <utility>
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template<class T1, class T2> pair(T1, T2) -> pair<T1, T2>; |
(since C++17) | |
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
Example
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 }