private static FanoutSearchDescriptor ConstructFanoutSearchDescriptor(List <FSDescCallchainElement> fs_callchain)
{
FanoutSearchDescriptor fs_desc = ConstructFanoutSearchOrigin(fs_callchain.First());
for (int idx = 1; idx < fs_callchain.Count; ++idx)
{
FSDescCallchainElement visitNode = fs_callchain[idx];
FSDescCallchainElement followEdge = null;
FanoutSearch.Action defaultAction = Action.Continue;
if (visitNode.Method == s_LIKQ_FollowEdge)
{
ThrowIf(++idx >= fs_callchain.Count, "The query expression cannot end with '" + s_LIKQ_FollowEdge + "'", visitNode.SyntaxNode);
followEdge = visitNode;
visitNode = fs_callchain[idx];
if (visitNode.Method == s_LIKQ_FollowEdge)
{
// two consequtive FollowEdge, use default traverse action.
--idx;
visitNode = null;
}
}
if (idx + 1 >= fs_callchain.Count)
{
// The last element should have default action Action.Return
defaultAction = Action.Return;
}
ThrowIf(visitNode.Method != s_LIKQ_VisitNode, "Expecting '" + s_LIKQ_VisitNode + "'", visitNode.SyntaxNode);
fs_desc = ConstructFanoutSearchBody(fs_desc, visitNode, followEdge, defaultAction);
}
return(fs_desc);
}
public void Test16()
{
FanoutSearch.Action a = FanoutSearch.Action.Continue, b = FanoutSearch.Action.Return;
var paths = KnowledgeGraph.StartFrom(1).VisitNode(_ => a & b);
paths.ToList();
}
