Makes replacements in a list of lines.
Simple specialisation of an exception class for MatrixRep.
Makes replacements in a list of lines.
Adds to the IR. No test is made to see if there is an existing or pre-existing conflicting entry or if a sequence of entries makes sense. It is expected that callers call this in line/column order of the original matrix. If not the results of a subsequent call to sideEffect() are undefined.
Makes the replacement, if line/col is out of range and ExceptionMatrixRep will be raised and the state of theMat argument is undefined.