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);
}
public override Expression VisitAssignment(AssignmentContext context)
{
var unaryExpression = Visit(context.unary_expression());
var expression = Visit(context.expression());
var op = context.assignment_operator().GetText();
if (op == "=")
{
return(Expression.Assign(unaryExpression, expression));
}
if (op == "+=")
{
return(Expression.AddAssign(unaryExpression, expression));
}
if (op == "-=")
{
return(Expression.SubtractAssign(unaryExpression, expression));
}
if (op == "*=")
{
return(Expression.MultiplyAssign(unaryExpression, expression));
}
if (op == "/=")
{
return(Expression.DivideAssign(unaryExpression, expression));
}
if (op == "%=")
{
return(Expression.ModuloAssign(unaryExpression, expression));
}
if (op == "&=")
{
return(Expression.AndAssign(unaryExpression, expression));
}
if (op == "|=")
{
return(Expression.OrAssign(unaryExpression, expression));
}
if (op == "^=")
{
return(Expression.ExclusiveOrAssign(unaryExpression, expression));
}
if (op == "<<=")
{
return(Expression.LeftShiftAssign(unaryExpression, expression));
}
if (op == ">>=")
{
return(Expression.RightShiftAssign(unaryExpression, expression));
}
throw new CompilationException($"Unsupported operation. Operation={op}", context);
}