public override object VisitAssignment([NotNull] NyaParser.AssignmentContext context)
{
switch (context.assignment_operator().GetText())
{
case "=":
return(DoBasicAssignment(context));
case "?=":
return(DoCoalesceAssignment(context));
default:
return(DoArithmenticAssignment(context));
}
}
private Type DoArithmenticAssignment(NyaParser.AssignmentContext context)
{
string sOperator = context.assignment_operator().GetText();
string sLocal = context.identifier().GetText();
Variable local = _scopeManager.FindVariable(sLocal);
local.Load(_ilg);
_stackDepth++;
Type src = (Type)Visit(context.expression());
Type dst = local.Type;
switch (sOperator)
{
case "+=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.Add, "op_Addition"); break;
case "-=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.Sub, "op_Subtraction"); break;
case "*=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.Mul, "op_Multiply"); break;
case "/=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.Div, "op_Division"); break;
case "%=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.Rem, "op_Modulus"); break;
case "&=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.And, "op_BitwiseAnd"); break;
case "|=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.Or, "op_BitwiseOr"); break;
case "^=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.Xor, "op_ExclusiveOr"); break;
case "<<=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.Shl, "op_LeftShift"); break;
case ">>=": TypeHelper.DoMath(_ilg, dst, src, OpCodes.Shr, "op_RightShift"); break;
}
local.Store(_ilg);
_stackDepth -= 2;
return(local.Type);
}