deduction guides for std::valarray
From cppreference.com
Defined in header <valarray>
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template<typename T, std::size_t cnt> valarray(const T(&)[cnt], std::size_t) -> valarray<T>; |
(since C++17) | |
This deduction guide is provided for std::valarray to allow deduction from array and size (note that deduction from pointer and size is covered by the implicit guides)
Example
Run this code
#include <valarray> int main() { int a[] = {1, 2, 3}; std::valarray va(a, 3); // uses explicit deduction guide }