deductionguidesforstdvalarray(3)

deductionguidesforstd::valarray - deductionguidesforstd::valarray

Synopsis

Defined in header <valarray> template<typename T, std::size_t cnt> (since C++17) valarray(const T(&)[cnt], std::size_t) -> valarray<T>;

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 }