std::valarray::operator+,-,~,!

valarray<T> operator+() const;

valarray<T> operator-() const;

valarray<T> operator~() const;

valarray<bool> operator!() const;

Applies unary operators to each element in the numeric array.

Parameters

(none).

Return value

A numeric array containing elements with values obtained by applying corresponding operator to the values in *this.

Exceptions

(none).

Notes

Each of the operators can only be instantiated if the following requirements are met:

• The indicated operator can be applied to type T
• The result value can be unambiguously converted to T (1-3) or bool (4).

The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:

• All const member functions of std::valarray are provided.
• std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type.
• All functions accepting an argument of type const std::valarray& except begin() and end() (since C++14) should also accept the replacement type.
• All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type.
• The return type does not add more than two levels of template nesting over the most deeply-nested argument type.