public override object VisitAssignment([NotNull] AssignmentContext context) { // checking if 'Sylvre' is being declared and assigned to. Sylvre is a builtin library so disallowed if (context.variable_complex_reference_left().variable_reference().GetText() == "Sylvre") { _transpileErrors.Add(new SylvreTranspileError { CharPositionInLine = context.variable_complex_reference_left().Start.Column + 1, // Column number 1 behind, zero based index? Line = context.variable_complex_reference_left().Start.Line, Symbol = context.variable_complex_reference_left().Start.Text, Message = _sylvreAssignmentDisallowedMessage }); } VisitVariable_complex_reference_left(context.variable_complex_reference_left()); VisitAssignment_operator(context.assignment_operator()); if (context.conditional_expression() != null) { VisitConditional_expression(context.conditional_expression()); } else { VisitArray_assignment(context.array_assignment()); } return(null); }