private static void AssignmentMissmatch(ExpressionNode left, ExpressionNode right, SequencePoint point)
{
ErrorCode.TypeMismatch.ReportAndThrow(point,
"Cannot assign {0} to {1}", right.ExpressionReturnType, left.ExpressionReturnType);
}
public static ExpressionNode Create(ContextNode context, AssignmentOperatorType op, ExpressionNode left, ExpressionNode right, SequencePoint point)
{
if (!left.IsSettable)
{
ErrorCode.NotAnLValue.ReportAndThrow(left.SequencePoint, "Left of assignment operator must be settable");
}
if (!right.IsGettable)
{
ErrorCode.NotAnRValue.ReportAndThrow(right.SequencePoint, "Right of assignment operator must be gettable");
}
var type = left.ExpressionReturnType;
var overloaded = AsOverloadedMethod(context, op, left, right, point);
if (overloaded != null)
{
return(overloaded);
}
if (op != AssignmentOperatorType.Assignment)
{
//only transform primitives
if (!(context.Parser.IsPrimitive(left.ExpressionReturnType) && context.Parser.IsPrimitive(right.ExpressionReturnType)))
{
AssignmentMissmatch(left, right, point);
}
if (!left.IsGettable)
{
ErrorCode.NotAnRValue.ReportAndThrow(right.SequencePoint, "Left of this type of assignment operator must be gettable");
}
right = BinaryOperatorNode.Create(context, AssignmentToBinary[op], left, right, point);
}
if (!right.ExpressionReturnType.IsAssignableTo(left.ExpressionReturnType))
{
ErrorCode.TypeMismatch.ReportAndThrow(point,
"Cannot assign {0} to {1}", right.ExpressionReturnType, left.ExpressionReturnType);
}
var instance = new AssignmentOperatorNode(point);
instance.left = left;
instance.right = right;
instance.type = left.ExpressionReturnType;
return(instance);
}
private static ExpressionNode AsOverloadedMethod(ContextNode context, AssignmentOperatorType op, ExpressionNode left, ExpressionNode right, SequencePoint point)
{
if (!OperatorMethods.ContainsKey(op))
{
return(null);
}
string name = OperatorMethods[op];
return(BinaryOperatorNode.AsOverload(context, name, left, right, point));
}