public override Expression Visit(Expression node)
{
if (node != null)
{
_currentExpr = new SnExpr {
Expression = node, IsExecutable = true
};
_expressions[node] = _currentExpr;
var parent = _parentChain.Count == 0 ? null : _parentChain.Peek();
_currentExpr.Parent = parent;
if (parent == null)
{
_rootExpr = _currentExpr;
}
else
{
parent.Children.Add(_currentExpr);
}
_parentChain.Push(_currentExpr);
}
var visited = base.Visit(node);
if (node != null)
{
_parentChain.Pop();
}
return(visited);
}
