BoundExpression BindAssignEx(AST.AssignEx expr, BoundAccess access)
{
var target = (BoundReferenceExpression)BindExpression(expr.LValue, BoundAccess.Write);
BoundExpression value;
// bind value (read as value or as ref)
if (expr is AST.ValueAssignEx)
{
value = BindExpression(((AST.ValueAssignEx)expr).RValue, BoundAccess.Read);
}
else
{
Debug.Assert(expr is AST.RefAssignEx);
Debug.Assert(expr.Operation == AST.Operations.AssignRef);
target.Access = target.Access.WithWriteRef(0); // note: analysis will write the write type
value = BindExpression(((AST.RefAssignEx)expr).RValue, BoundAccess.ReadRef);
}
//
if (expr.Operation == AST.Operations.AssignValue || expr.Operation == AST.Operations.AssignRef)
{
return(new BoundAssignEx(target, value).WithAccess(access));
}
else
{
target.Access = target.Access.WithRead(); // Read & Write on target
return(new BoundCompoundAssignEx(target, value, expr.Operation));
}
}
/// <summary>
/// Visit l-value of assignment.
/// </summary>
/// <param name="x"></param>
virtual public void VisitAssignEx(AssignEx x)
{
VisitElement(x.LValue);
}