Method operator!

include/boost/compute/container/valarray.hpp:147–161

In OpenCL there cannot be memory buffer with bool type, for this reason return type is valarray instead of valarray . 1 means true, 0 means false.

    /// this reason return type is valarray<char> instead of valarray<bool>.
    /// 1 means true, 0 means false.
    valarray<char> operator!() const
    {
        BOOST_STATIC_ASSERT_MSG(
            is_fundamental<T>::value,
            "This operator can be used with all OpenCL built-in scalar"
            " and vector types"
        );
        valarray<char> result(size());
        BOOST_COMPUTE_FUNCTION(char, logical_not, (T x),
        {
            return !x;
        });
        transform(begin(), end(), &result[0], logical_not);
        return result;
    }

    valarray<T>& operator+=(const T&);