std::span::operator[], std::span::operator()

constexpr reference operator[](index_type idx) const;

constexpr reference operator()(index_type idx) const;

Returns a reference to the idx-th element of the sequence. The behavior is undefined if idx is out of range (i.e., if it is less than zero or greater than or equal to size()).

Parameters

Return value

A reference to the idx-th element of the sequence, i.e., data()[idx]

Exceptions

(none).

Notes

operator() is overloaded for consistency with proposed multidimensional arrays, which are indexed as array3D(i, j, k).

See also