protected override bool Walk(UnaryExpression node)
{
if (node.NodeType == AstNodeType.Convert && node.Operand is BoundExpression)
{
var be = node.Operand as BoundExpression;
if (!be.Variable.Lift)
{
var origbe = be;
if (be.Variable.Kind == Variable.VariableKind.Local && be.Variable.AssumedValue is BoundExpression)
{
var assbe = be.Variable.AssumedValue as BoundExpression;
if (assbe.Variable.Kind == Variable.VariableKind.Parameter)
{
be = assbe;
}
}
if (be.Variable.Kind == Variable.VariableKind.Parameter
&& be.Type == typeof(object)
&& node.Type != typeof(object))
{
Dictionary<Type, int> counts;
if (!references.TryGetValue(origbe.Variable, out counts))
{
references[origbe.Variable] = counts = new Dictionary<Type, int>();
}
if (counts.ContainsKey(node.Type))
{
counts[node.Type]++;
}
else
{
counts[node.Type] = 1;
}
}
}
}
return base.Walk(node);
}
protected override void PostWalk(UnaryExpression node)
{
base.PostWalk(node);
if (node.NodeType == AstNodeType.Convert)
{
var op = node.Operand;
if (op.NodeType == AstNodeType.Convert)
{
var inode = op as UnaryExpression;
if (inode.Operand.Type == node.Type)
{
node.Operand = inode.Operand;
}
}
if (node.Type != typeof(object) &&
node.Type != op.Type &&
node.Type.IsAssignableFrom(op.Type) &&
!(node.Type.IsInterface && op.Type.IsValueType))
{
node.SetType(op.Type);
}
}
}
protected override bool Walk(UnaryExpression node)
{
if (node.NodeType == AstNodeType.Convert && node.Operand is BoundExpression)
{
var be = node.Operand as BoundExpression;
var tv = be.Variable.GetTypedVariable(node.Type);
if (tv != null)
{
be.Variable = tv;
}
}
return base.Walk(node);
}
// UnaryExpression
private void DefaultWalk(UnaryExpression node)
{
if (Walk(node)) {
WalkNode(node.Operand);
}
PostWalk(node);
}
protected override bool Walk(UnaryExpression node)
{
if (node.NodeType == AstNodeType.Convert)
{
if (node.Operand is BoundExpression)
{
var be = node.Operand as BoundExpression;
ProcessAssignment(node, be.Variable, false);
}
}
return base.Walk(node);
}