562   Subtree S2;  member in clang::diff::ZhangShashaMatcher
568       : DiffImpl(DiffImpl), S1(T1, Id1), S2(T2, Id2) {  in ZhangShashaMatcher()
574       TreeDist[I] = std::make_unique<double[]>(size_t(S2.getSize()) + 1);  in ZhangShashaMatcher()
575       ForestDist[I] = std::make_unique<double[]>(size_t(S2.getSize()) + 1);  in ZhangShashaMatcher()
587     TreePairs.emplace_back(SNodeId(S1.getSize()), SNodeId(S2.getSize()));  in getMatchingNodes()
601       FirstCol = S2.getLeftMostDescendant(LastCol);  in getMatchingNodes()
615           SNodeId LMD2 = S2.getLeftMostDescendant(Col);  in getMatchingNodes()
617               LMD2 == S2.getLeftMostDescendant(LastCol)) {  in getMatchingNodes()
619             NodeId Id2 = S2.getIdInRoot(Col);  in getMatchingNodes()
646     if (!DiffImpl.isMatchingPossible(S1.getIdInRoot(Id1), S2.getIdInRoot(Id2)))  in getUpdateCost()
648     return S1.getNodeValue(Id1) != S2.getNodeValue(Id2);  in getUpdateCost()
653       for (SNodeId Id2 : S2.KeyRoots)  in computeTreeDist()
660     SNodeId LMD2 = S2.getLeftMostDescendant(Id2);  in computeForestDist()
668         SNodeId DLMD2 = S2.getLeftMostDescendant(D2);  in computeForestDist()