std::swap(std::valarray) - cppreference.com (original) (raw)

Specializes the std::swap algorithm for std::valarray. Swaps the contents of lhs and rhs. Calls lhs.swap(rhs).

[edit] Parameters

[edit] Return value

(none)

[edit] Complexity

Constant.

[edit] Example

#include #include   void print(auto rem, const std::valarray& v) { std::cout << rem << '{'; for (char sep[]{0, ' ', 0}; auto elem : v) std::cout << sep << elem, *sep = ','; std::cout << "}\n"; }   int main() { std::valarray x{3, 1, 4, 1, 5}; std::valarray y{2, 7, 1, 8};   print("Before swap:\n" "x: ", x); print("y: ", y);   std::swap(x, y);   print("After swap:\n" "x: ", x); print("y: ", y); }

Output:

Before swap: x: {3, 1, 4, 1, 5} y: {2, 7, 1, 8} After swap: x: {2, 7, 1, 8} y: {3, 1, 4, 1, 5}

[edit] See also

| | swaps with another valarray (public member function) [edit] | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |