std::valarray<T>::operator+,-,~,! (3) - Linux Manuals

std::valarray<T>::operator+,-,~,!: std::valarray<T>::operator+,-,~,!

NAME

std::valarray<T>::operator+,-,~,! - std::valarray<T>::operator+,-,~,!

Synopsis

valarray<T> operator+() const; (1)
valarray<T> operator-() const; (2)
valarray<T> operator~() const; (3)
valarray<bool> operator!() const; (4)

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++11) 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.