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**651**- (**download**) (**annotate**)*Thu Jun 1 18:34:03 2000 UTC*(19 years, 1 month ago) by*monnier*File size: 837 byte(s)

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(* * Trace subgraph adaptor. This takes a linear list of node ids. * The view returned is the part of the graph that lies on this linear list. *) signature TRACE_SUBGRAPH_VIEW = sig val trace_view : Graph.node_id list -> ('n,'e,'g) Graph.graph -> ('n,'e,'g) Graph.graph end structure TraceView : TRACE_SUBGRAPH_VIEW = struct structure G = Graph structure A = HashArray structure S = Subgraph_P_View fun trace_view nodes (G as G.GRAPH g) = let val ord = A.array(#capacity g (),~100) fun order(i,[]) = () | order(i,n::ns) = (A.update(ord,n,i); order(i+1,ns)) val _ = order(0,nodes) fun node_p i = A.sub(ord,i) >= 0 fun edge_p (i,j) = A.sub(ord,i) + 1 = A.sub(ord,j) in S.subgraph_p_view nodes node_p edge_p G end end

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