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) orbool
(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 ofstd::valarray
are provided. -
std::valarray
,std::slice_array
,std::gslice_array
,std::mask_array
andstd::indirect_array
can be constructed from the replacement type. - All functions accepting an argument of type
const std::valarray&
exceptbegin()
andend()
(since C++14) should also accept the replacement type. - All functions accepting two arguments of type
const std::valarray&
should accept every combination ofconst 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.
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