deductionguidesforstd::valarray (3) - Linux Manuals

deductionguidesforstd::valarray: deductionguidesforstd::valarray


deductionguidesforstd::valarray - deductionguidesforstd::valarray


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)


// Run this code

  #include <valarray>
  int main() {
    int a[] = {1, 2, 3};
    std::valarray va(a, 3); // uses explicit deduction guide