operator[]() [1/2]

const_reference operator[] ( std::size_t  off ) const

noexcept

Provides the caller with an immutable arbitrary access to an element of a matrix column.

Parameters

off	An offset of the position of the desired element with respect to the beginning of the column.

Returns

A reference to an immutable element at the position off within the column.

Unlike matrix_column::at, the function does not validate the value of off.