512if (RegexPrefixAnalyzer.FindTrailingAnchor(_regexTree.Root) == RegexNodeKind.End && 668case RegexNodeKind.Bol: 747case RegexNodeKind.End or RegexNodeKind.EndZ when _regexTree.FindOptimizations.MaxPossibleLength is int maxLength: 1268Debug.Assert(target.LoopNode.Kind is RegexNodeKind.Setloop or RegexNodeKind.Setlazy or RegexNodeKind.Setloopatomic); 1451Debug.Assert(node.Kind == RegexNodeKind.Capture, "Every generated tree should begin with a capture node"); 1461case RegexNodeKind.Multi or RegexNodeKind.Notone or RegexNodeKind.One or RegexNodeKind.Set: 1467int length = node.Kind == RegexNodeKind.Multi ? node.Str!.Length : 1; 1667Debug.Assert(node.Kind is RegexNodeKind.Alternate, $"Unexpected type: {node.Kind}"); 1872Debug.Assert(node.Kind is RegexNodeKind.Backreference, $"Unexpected type: {node.Kind}"); 2047Debug.Assert(node.Kind is RegexNodeKind.BackreferenceConditional, $"Unexpected type: {node.Kind}"); 2061RegexNode? noBranch = node.Child(1) is { Kind: not RegexNodeKind.Empty } childNo ? childNo : null; 2206Debug.Assert(node.Kind is RegexNodeKind.ExpressionConditional, $"Unexpected type: {node.Kind}"); 2222RegexNode? noBranch = node.Child(2) is { Kind: not RegexNodeKind.Empty } childNo ? childNo : null; 2399Debug.Assert(node.Kind is RegexNodeKind.Capture, $"Unexpected type: {node.Kind}"); 2525Debug.Assert(node.Kind is RegexNodeKind.PositiveLookaround, $"Unexpected type: {node.Kind}"); 2569Debug.Assert(node.Kind is RegexNodeKind.NegativeLookaround, $"Unexpected type: {node.Kind}"); 2720case RegexNodeKind.Beginning: 2721case RegexNodeKind.Start: 2722case RegexNodeKind.Bol: 2723case RegexNodeKind.Eol: 2724case RegexNodeKind.End: 2725case RegexNodeKind.EndZ: 2729case RegexNodeKind.Boundary: 2730case RegexNodeKind.NonBoundary: 2731case RegexNodeKind.ECMABoundary: 2732case RegexNodeKind.NonECMABoundary: 2736case RegexNodeKind.Multi: 2740case RegexNodeKind.One: 2741case RegexNodeKind.Notone: 2742case RegexNodeKind.Set: 2746case RegexNodeKind.Oneloop: 2747case RegexNodeKind.Notoneloop: 2748case RegexNodeKind.Setloop: 2752case RegexNodeKind.Onelazy: 2753case RegexNodeKind.Notonelazy: 2754case RegexNodeKind.Setlazy: 2758case RegexNodeKind.Oneloopatomic: 2759case RegexNodeKind.Notoneloopatomic: 2760case RegexNodeKind.Setloopatomic: 2764case RegexNodeKind.Loop: 2768case RegexNodeKind.Lazyloop: 2772case RegexNodeKind.Alternate: 2776case RegexNodeKind.Concatenate: 2780case RegexNodeKind.Atomic: 2784case RegexNodeKind.Backreference: 2788case RegexNodeKind.BackreferenceConditional: 2792case RegexNodeKind.ExpressionConditional: 2796case RegexNodeKind.Capture: 2800case RegexNodeKind.PositiveLookaround: 2804case RegexNodeKind.NegativeLookaround: 2808case RegexNodeKind.Nothing: 2812case RegexNodeKind.Empty: 2816case RegexNodeKind.UpdateBumpalong: 2828Debug.Assert(node.Kind is RegexNodeKind.Atomic or RegexNodeKind.PositiveLookaround or RegexNodeKind.NegativeLookaround or RegexNodeKind.ExpressionConditional, $"Unexpected type: {node.Kind}"); 2829Debug.Assert(node.Kind is RegexNodeKind.ExpressionConditional ? node.ChildCount() >= 1 : node.ChildCount() == 1, $"Unexpected number of children: {node.ChildCount()}"); 2835if (node.Kind is RegexNodeKind.Atomic && !analysis.MayBacktrack(child)) 2872Debug.Assert(node.Kind is RegexNodeKind.UpdateBumpalong, $"Unexpected type: {node.Kind}"); 2892Debug.Assert(node.Kind is RegexNodeKind.Concatenate, $"Unexpected type: {node.Kind}"); 2950if (next.Kind is not RegexNodeKind.UpdateBumpalong) // skip node types that don't have a semantic impact 3038Debug.Assert(node.Kind is RegexNodeKind.Boundary or RegexNodeKind.NonBoundary or RegexNodeKind.ECMABoundary or RegexNodeKind.NonECMABoundary, $"Unexpected type: {node.Kind}"); 3056case RegexNodeKind.Boundary or RegexNodeKind.NonBoundary: 3070if (node.Kind is RegexNodeKind.Boundary) 3083if (node.Kind is RegexNodeKind.ECMABoundary) 3098Debug.Assert(node.Kind is RegexNodeKind.Beginning or RegexNodeKind.Start or RegexNodeKind.Bol or RegexNodeKind.End or RegexNodeKind.EndZ or RegexNodeKind.Eol, $"Unexpected type: {node.Kind}"); 3105case RegexNodeKind.Beginning: 3106case RegexNodeKind.Start: 3117if (node.Kind == RegexNodeKind.Beginning) 3129case RegexNodeKind.Bol: 3160case RegexNodeKind.End: 3177case RegexNodeKind.EndZ: 3194goto case RegexNodeKind.Eol; 3196case RegexNodeKind.Eol: 3236Debug.Assert(node.Kind is RegexNodeKind.Multi, $"Unexpected type: {node.Kind}"); 3288Debug.Assert(node.Kind is RegexNodeKind.Oneloop or RegexNodeKind.Notoneloop or RegexNodeKind.Setloop, $"Unexpected type: {node.Kind}"); 3504Debug.Assert(node.Kind is RegexNodeKind.Onelazy or RegexNodeKind.Notonelazy or RegexNodeKind.Setlazy, $"Unexpected type: {node.Kind}"); 3605node.Kind is RegexNodeKind.Notonelazy && 3746node.Kind is RegexNodeKind.Setlazy && 3851Debug.Assert(node.Kind is RegexNodeKind.Lazyloop, $"Unexpected type: {node.Kind}"); 4362Debug.Assert(node.Kind is RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic, $"Unexpected type: {node.Kind}"); 4609Debug.Assert(node.Kind is RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic, $"Unexpected type: {node.Kind}"); 4698Debug.Assert(node.Kind is RegexNodeKind.Loop or RegexNodeKind.Lazyloop, $"Unexpected type: {node.Kind}"); 4736Debug.Assert(node.Kind is RegexNodeKind.Loop or RegexNodeKind.Lazyloop, $"Unexpected type: {node.Kind}"); 5134if (node.Kind == RegexNodeKind.Multi) 5167if (node.Kind == RegexNodeKind.Multi) 5360if (root.Kind is RegexNodeKind.Multi or RegexNodeKind.One or RegexNodeKind.Notone or RegexNodeKind.Set) 5378Ldc((root.Kind == RegexNodeKind.Multi ? root.Str!.Length : 1) * (!rtl ? 1 : -1));

56if (rightToLeft && LeadingAnchor == RegexNodeKind.Bol) 59LeadingAnchor = RegexNodeKind.Unknown; 61if (LeadingAnchor is RegexNodeKind.Beginning or RegexNodeKind.Start or RegexNodeKind.EndZ or RegexNodeKind.End) 65(RegexNodeKind.Beginning, false) => FindNextStartingPositionMode.LeadingAnchor_LeftToRight_Beginning, 66(RegexNodeKind.Beginning, true) => FindNextStartingPositionMode.LeadingAnchor_RightToLeft_Beginning, 67(RegexNodeKind.Start, false) => FindNextStartingPositionMode.LeadingAnchor_LeftToRight_Start, 68(RegexNodeKind.Start, true) => FindNextStartingPositionMode.LeadingAnchor_RightToLeft_Start, 69(RegexNodeKind.End, false) => FindNextStartingPositionMode.LeadingAnchor_LeftToRight_End, 70(RegexNodeKind.End, true) => FindNextStartingPositionMode.LeadingAnchor_RightToLeft_End, 83if (TrailingAnchor is RegexNodeKind.End or RegexNodeKind.EndZ && 90FindMode = TrailingAnchor == RegexNodeKind.End ? 280LeadingAnchor == RegexNodeKind.Bol; // there's a leading BOL anchor we can otherwise search for 286public RegexNodeKind LeadingAnchor { get; private set; } 289public RegexNodeKind TrailingAnchor { get; } 409Debug.Assert(LeadingAnchor != RegexNodeKind.Bol, "BOL isn't enabled for RTL"); 535if (LeadingAnchor == RegexNodeKind.Bol) 822Debug.Assert(loopNode.Kind is RegexNodeKind.Setloop or RegexNodeKind.Setlazy or RegexNodeKind.Setloopatomic);

23public RegexNodeKind Kind { get; private set; } 26/// <remarks>For a <see cref="RegexNodeKind.Multi"/>, this is the string from the expression. For an <see cref="IsSetFamily"/> node, this is the character class string from <see cref="RegexCharClass"/>.</remarks> 51public RegexNode(RegexNodeKind kind, RegexOptions options) 57public RegexNode(RegexNodeKind kind, RegexOptions options, char ch) 64public RegexNode(RegexNodeKind kind, RegexOptions options, string str) 71public RegexNode(RegexNodeKind kind, RegexOptions options, int m) 78public RegexNode(RegexNodeKind kind, RegexOptions options, int m, int n) 89Debug.Assert(Kind is RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or 90RegexNodeKind.Notonelazy or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or 91RegexNodeKind.Setlazy or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic); 121return new RegexNode(RegexNodeKind.One, options & ~RegexOptions.IgnoreCase, ch); 127return new RegexNode(RegexNodeKind.Set, options & ~RegexOptions.IgnoreCase, stringSet); 131return new RegexNode(RegexNodeKind.One, options, ch); 138Kind == RegexNodeKind.Concatenate && 150private void MakeRep(RegexNodeKind kind, int min, int max) 152Kind += kind - RegexNodeKind.One; 169case RegexNodeKind.Oneloop or RegexNodeKind.Notoneloop or RegexNodeKind.Setloop: 172Kind += RegexNodeKind.Oneloopatomic - RegexNodeKind.Oneloop; 175case RegexNodeKind.Onelazy or RegexNodeKind.Notonelazy or RegexNodeKind.Setlazy: 179Kind += RegexNodeKind.Oneloopatomic - RegexNodeKind.Onelazy; 189Kind = RegexNodeKind.Empty; 193else if (Kind == RegexNodeKind.Oneloopatomic && N is >= 2 and <= MultiVsRepeaterLimit) 197Kind = RegexNodeKind.Multi; 204case RegexNodeKind.Loop: 205if (Parent is not { Kind: RegexNodeKind.Atomic }) 207RegexNode loopAsChild = new(RegexNodeKind.Loop, Options, M, N); 208Kind = RegexNodeKind.Atomic; 215case RegexNodeKind.Lazyloop: 225goto case RegexNodeKind.Loop; 228Kind = RegexNodeKind.Empty; 243Debug.Assert(Kind == RegexNodeKind.Capture, "Every generated tree should begin with a capture node"); 262Debug.Assert(Kind != RegexNodeKind.Group, "All Group nodes should have been removed."); 267case RegexNodeKind.Group: 271case RegexNodeKind.Beginning: 272case RegexNodeKind.Bol: 273case RegexNodeKind.Boundary: 274case RegexNodeKind.ECMABoundary: 275case RegexNodeKind.Empty: 276case RegexNodeKind.End: 277case RegexNodeKind.EndZ: 278case RegexNodeKind.Eol: 279case RegexNodeKind.Multi: 280case RegexNodeKind.NonBoundary: 281case RegexNodeKind.NonECMABoundary: 282case RegexNodeKind.Nothing: 283case RegexNodeKind.Notone: 284case RegexNodeKind.Notonelazy: 285case RegexNodeKind.Notoneloop: 286case RegexNodeKind.Notoneloopatomic: 287case RegexNodeKind.One: 288case RegexNodeKind.Onelazy: 289case RegexNodeKind.Oneloop: 290case RegexNodeKind.Oneloopatomic: 291case RegexNodeKind.Backreference: 292case RegexNodeKind.Set: 293case RegexNodeKind.Setlazy: 294case RegexNodeKind.Setloop: 295case RegexNodeKind.Setloopatomic: 296case RegexNodeKind.Start: 297case RegexNodeKind.UpdateBumpalong: 301case RegexNodeKind.Atomic: 302case RegexNodeKind.Capture: 303case RegexNodeKind.Lazyloop: 304case RegexNodeKind.Loop: 305case RegexNodeKind.NegativeLookaround: 306case RegexNodeKind.PositiveLookaround: 310case RegexNodeKind.BackreferenceConditional: 314case RegexNodeKind.ExpressionConditional: 318case RegexNodeKind.Concatenate: 319case RegexNodeKind.Alternate: 331case RegexNodeKind.Multi: 336case RegexNodeKind.Set: 337case RegexNodeKind.Setloop: 338case RegexNodeKind.Setloopatomic: 339case RegexNodeKind.Setlazy: 351case RegexNodeKind.Backreference: 372Debug.Assert(rootNode.Kind == RegexNodeKind.Capture); 415case RegexNodeKind.Atomic: 419case RegexNodeKind.Concatenate: 424case RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic when node.N == int.MaxValue: 425case RegexNodeKind.Onelazy or RegexNodeKind.Notonelazy or RegexNodeKind.Setlazy when node.N == int.MaxValue && !atomicByAncestry: 426if (node.Parent is { Kind: RegexNodeKind.Concatenate } parent) 428parent.InsertChild(1, new RegexNode(RegexNodeKind.UpdateBumpalong, node.Options)); 476case RegexNodeKind.Oneloop or RegexNodeKind.Notoneloop or RegexNodeKind.Setloop: 477case RegexNodeKind.Onelazy or RegexNodeKind.Notonelazy or RegexNodeKind.Setlazy: 483case RegexNodeKind.Atomic: 484case RegexNodeKind.PositiveLookaround: 485case RegexNodeKind.NegativeLookaround: 495case RegexNodeKind.Capture: 496case RegexNodeKind.Concatenate when !rtl: 498if ((existingChild.Kind is RegexNodeKind.Alternate or RegexNodeKind.BackreferenceConditional or RegexNodeKind.ExpressionConditional or RegexNodeKind.Loop or RegexNodeKind.Lazyloop) && 499node.Parent is not { Kind: RegexNodeKind.Atomic }) // validate grandparent isn't atomic 501var atomic = new RegexNode(RegexNodeKind.Atomic, existingChild.Options); 511case RegexNodeKind.Alternate: 512case RegexNodeKind.BackreferenceConditional: 513case RegexNodeKind.ExpressionConditional: 521if (node.Kind != RegexNodeKind.ExpressionConditional) // ReduceExpressionConditional will have already applied ending backtracking removal 536case RegexNodeKind.Lazyloop: 537case RegexNodeKind.Loop: 542Debug.Assert(node.Kind is RegexNodeKind.Atomic or RegexNodeKind.Empty or RegexNodeKind.Loop or RegexNodeKind.Lazyloop); 544if (node.Kind is RegexNodeKind.Atomic) 547Debug.Assert(node.Kind is RegexNodeKind.Loop or RegexNodeKind.Lazyloop); 550if (node.Kind is RegexNodeKind.Loop or RegexNodeKind.Lazyloop) 584case RegexNodeKind.Backreference: 591RegexNodeKind.Alternate => ReduceAlternation(), 592RegexNodeKind.Atomic => ReduceAtomic(), 593RegexNodeKind.Concatenate => ReduceConcatenation(), 594RegexNodeKind.Group => ReduceGroup(), 595RegexNodeKind.Loop or RegexNodeKind.Lazyloop => ReduceLoops(), 596RegexNodeKind.PositiveLookaround or RegexNodeKind.NegativeLookaround => ReduceLookaround(), 597RegexNodeKind.Set or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic or RegexNodeKind.Setlazy => ReduceSet(), 598RegexNodeKind.ExpressionConditional => ReduceExpressionConditional(), 599RegexNodeKind.BackreferenceConditional => ReduceBackreferenceConditional(), 612Debug.Assert(Kind is RegexNodeKind.Alternate or RegexNodeKind.Concatenate); 6150 => new RegexNode(Kind == RegexNodeKind.Alternate ? RegexNodeKind.Nothing : RegexNodeKind.Empty, Options), 629Debug.Assert(Kind == RegexNodeKind.Group); 632while (u.Kind == RegexNodeKind.Group) 657Debug.Assert(Kind == RegexNodeKind.Atomic); 662while (child.Kind == RegexNodeKind.Atomic) 672case RegexNodeKind.Empty: 673case RegexNodeKind.Nothing: 677case RegexNodeKind.Oneloopatomic: 678case RegexNodeKind.Notoneloopatomic: 679case RegexNodeKind.Setloopatomic: 684case RegexNodeKind.Oneloop: 685case RegexNodeKind.Notoneloop: 686case RegexNodeKind.Setloop: 687case RegexNodeKind.Onelazy: 688case RegexNodeKind.Notonelazy: 689case RegexNodeKind.Setlazy: 695case RegexNodeKind.Alternate: 704if (branches[0].Kind == RegexNodeKind.Empty) 706return new RegexNode(RegexNodeKind.Empty, child.Options); 715if (branches[i].Kind == RegexNodeKind.Empty) 796(child.Child(0).Kind is RegexNodeKind.Empty || child.Child(1).Kind is RegexNodeKind.Empty); // can be transformed into a ? or ?? 811return child.Kind == RegexNodeKind.Empty ? 826Debug.Assert(Kind is RegexNodeKind.Loop or RegexNodeKind.Lazyloop); 829RegexNodeKind kind = Kind; 842if (kind == RegexNodeKind.Loop) 846case RegexNodeKind.Oneloop: 847case RegexNodeKind.Oneloopatomic: 848case RegexNodeKind.Notoneloop: 849case RegexNodeKind.Notoneloopatomic: 850case RegexNodeKind.Setloop: 851case RegexNodeKind.Setloopatomic: 860case RegexNodeKind.Onelazy: 861case RegexNodeKind.Notonelazy: 862case RegexNodeKind.Setlazy: 896return new RegexNode(RegexNodeKind.Nothing, Options); 907case RegexNodeKind.One: 908case RegexNodeKind.Notone: 909case RegexNodeKind.Set: 910child.MakeRep(u.Kind == RegexNodeKind.Lazyloop ? RegexNodeKind.Onelazy : RegexNodeKind.Oneloop, u.M, u.N); 914case RegexNodeKind.Empty: 919case RegexNodeKind.PositiveLookaround when ContainsKind(child, [RegexNodeKind.Capture]) is false: 920case RegexNodeKind.NegativeLookaround or 921RegexNodeKind.Beginning or RegexNodeKind.Start or 922RegexNodeKind.Bol or RegexNodeKind.Eol or 923RegexNodeKind.End or RegexNodeKind.EndZ or 924RegexNodeKind.Boundary or RegexNodeKind.ECMABoundary or 925RegexNodeKind.NonBoundary or RegexNodeKind.NonECMABoundary: 935u = u.M == 0 ? new RegexNode(RegexNodeKind.Empty, Options) : child; 958Debug.Assert(Kind is RegexNodeKind.Set or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic or RegexNodeKind.Setlazy); 963Kind = RegexNodeKind.Nothing; 971Kind == RegexNodeKind.Set ? RegexNodeKind.One : 972Kind == RegexNodeKind.Setloop ? RegexNodeKind.Oneloop : 973Kind == RegexNodeKind.Setloopatomic ? RegexNodeKind.Oneloopatomic : 974RegexNodeKind.Onelazy; 981Kind == RegexNodeKind.Set ? RegexNodeKind.Notone : 982Kind == RegexNodeKind.Setloop ? RegexNodeKind.Notoneloop : 983Kind == RegexNodeKind.Setloopatomic ? RegexNodeKind.Notoneloopatomic : 984RegexNodeKind.Notonelazy; 1018Debug.Assert(Kind == RegexNodeKind.Alternate); 1023return new RegexNode(RegexNodeKind.Nothing, Options); 1031if (node.Kind == RegexNodeKind.Alternate) 1034if (node.Kind == RegexNodeKind.Alternate) 1037if (node.Kind == RegexNodeKind.Alternate) 1045if (node.Kind is RegexNodeKind.Alternate && node.ChildCount() == 2) 1047if (node.Child(1).Kind is RegexNodeKind.Empty) 1051else if (node.Child(0).Kind is RegexNodeKind.Empty) 1088if (at.Kind == RegexNodeKind.Alternate) 1106else if (at.Kind is RegexNodeKind.Set or RegexNodeKind.One) 1111if (at.Kind == RegexNodeKind.Set) 1135if (prev.Kind == RegexNodeKind.One) 1145if (at.Kind == RegexNodeKind.One) 1155prev.Kind = RegexNodeKind.Set; 1162else if (at.Kind == RegexNodeKind.Nothing) 1186Debug.Assert(alternation.Kind == RegexNodeKind.Alternate); 1199if (child.Kind != RegexNodeKind.Concatenate || child.ChildCount() < 2) 1216case RegexNodeKind.One or RegexNodeKind.Notone or RegexNodeKind.Set: 1217case RegexNodeKind.Oneloopatomic or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Setloopatomic: 1218case RegexNodeKind.Oneloop or RegexNodeKind.Notoneloop or RegexNodeKind.Setloop or RegexNodeKind.Onelazy or RegexNodeKind.Notonelazy or RegexNodeKind.Setlazy when required.M == required.N: 1219case RegexNodeKind.Beginning or RegexNodeKind.Start or RegexNodeKind.Bol 1220or RegexNodeKind.End or RegexNodeKind.EndZ or RegexNodeKind.Eol 1221or RegexNodeKind.Boundary or RegexNodeKind.ECMABoundary 1222or RegexNodeKind.NonBoundary or RegexNodeKind.NonECMABoundary: 1252var newAlternate = new RegexNode(RegexNodeKind.Alternate, alternation.Options); 1260if (alternation.Parent is RegexNode { Kind: RegexNodeKind.Atomic }) 1262var atomic = new RegexNode(RegexNodeKind.Atomic, alternation.Options); 1269var newConcat = new RegexNode(RegexNodeKind.Concatenate, alternation.Options); 1285Debug.Assert(node.Kind == RegexNodeKind.Alternate); 1296case RegexNodeKind.Empty when !seenEmpty: 1300case RegexNodeKind.Empty: 1301case RegexNodeKind.Nothing: 1328Debug.Assert(alternation.Kind == RegexNodeKind.Alternate); 1355if (startingNode.Kind == RegexNodeKind.One) 1375if (startingNode.Kind == RegexNodeKind.One) 1389Debug.Assert(startingNode.Kind == RegexNodeKind.Multi); 1420new RegexNode(RegexNodeKind.One, startingNodeOptions, startingSpan[0]) : 1421new RegexNode(RegexNodeKind.Multi, startingNodeOptions, startingSpan.ToString()); 1422var newAlternate = new RegexNode(RegexNodeKind.Alternate, startingNodeOptions); 1426ProcessOneOrMulti(branch.Kind == RegexNodeKind.Concatenate ? branch.Child(0) : branch, startingSpan); 1434if (node.Kind == RegexNodeKind.One) 1438node.Kind = RegexNodeKind.Empty; 1443Debug.Assert(node.Kind == RegexNodeKind.Multi); 1447node.Kind = RegexNodeKind.Empty; 1452node.Kind = RegexNodeKind.One; 1464if (alternation.Parent is RegexNode parent && parent.Kind == RegexNodeKind.Atomic) 1466var atomic = new RegexNode(RegexNodeKind.Atomic, startingNodeOptions); 1471var newConcat = new RegexNode(RegexNodeKind.Concatenate, startingNodeOptions); 1491RegexNode branch = Kind == RegexNodeKind.Concatenate ? Child(0) : this; 1492return branch.Kind is RegexNodeKind.One or RegexNodeKind.Multi ? branch : null; 1498Debug.Assert(Kind is RegexNodeKind.One or RegexNodeKind.Multi || (IsOneFamily && M > 0)); 1513case RegexNodeKind.One: 1514case RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Onelazy when node.M > 0: 1515case RegexNodeKind.Notone: 1516case RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Notonelazy when node.M > 0: 1517case RegexNodeKind.Set: 1518case RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic or RegexNodeKind.Setlazy when node.M > 0: 1519case RegexNodeKind.Multi: 1522case RegexNodeKind.Atomic: 1523case RegexNodeKind.Concatenate: 1524case RegexNodeKind.Capture: 1525case RegexNodeKind.Group: 1526case RegexNodeKind.Loop or RegexNodeKind.Lazyloop when node.M > 0: 1527case RegexNodeKind.PositiveLookaround when allowZeroWidth: 1548case RegexNodeKind.One or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Onelazy: 1551case RegexNodeKind.Notone or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Notonelazy: 1554case RegexNodeKind.Set or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic or RegexNodeKind.Setlazy: 1570case RegexNodeKind.Multi: 1613Debug.Assert(Kind == RegexNodeKind.Concatenate); 1619return new RegexNode(RegexNodeKind.Empty, Options); 1629if (child.Kind == RegexNodeKind.Nothing) 1655Debug.Assert(Kind == RegexNodeKind.Concatenate); 1672if (at.Kind == RegexNodeKind.Concatenate && 1691else if (at.Kind is RegexNodeKind.Multi or RegexNodeKind.One) 1705if (prev.Kind == RegexNodeKind.One) 1707prev.Kind = RegexNodeKind.Multi; 1712((at.Kind == RegexNodeKind.One) ? $"{prev.Str}{at.Ch}" : prev.Str + at.Str) : 1713((at.Kind == RegexNodeKind.One) ? $"{at.Ch}{prev.Str}" : at.Str + prev.Str); 1715else if (at.Kind == RegexNodeKind.Empty) 1738Debug.Assert(Kind == RegexNodeKind.Concatenate); 1776case RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Onelazy or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Notonelazy when nextNode.Kind == currentNode.Kind && currentNode.Ch == nextNode.Ch: 1777case RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic or RegexNodeKind.Setlazy when nextNode.Kind == currentNode.Kind && currentNode.Str == nextNode.Str: 1779currentNode.Kind is RegexNodeKind.Oneloopatomic or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Setloopatomic) 1802case RegexNodeKind.Oneloop or RegexNodeKind.Onelazy when nextNode.Kind == RegexNodeKind.One && currentNode.Ch == nextNode.Ch: 1803case RegexNodeKind.Notoneloop or RegexNodeKind.Notonelazy when nextNode.Kind == RegexNodeKind.Notone && currentNode.Ch == nextNode.Ch: 1804case RegexNodeKind.Setloop or RegexNodeKind.Setlazy when nextNode.Kind == RegexNodeKind.Set && currentNode.Str == nextNode.Str: 1818case RegexNodeKind.Oneloop or RegexNodeKind.Onelazy when 1819nextNode.Kind == RegexNodeKind.Multi && 1852nextNode.Kind = RegexNodeKind.One; 1870case RegexNodeKind.One when (nextNode.Kind is RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Onelazy) && currentNode.Ch == nextNode.Ch: 1871case RegexNodeKind.Notone when (nextNode.Kind is RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Notonelazy) && currentNode.Ch == nextNode.Ch: 1872case RegexNodeKind.Set when (nextNode.Kind is RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic or RegexNodeKind.Setlazy) && currentNode.Str == nextNode.Str: 1885case RegexNodeKind.Notone when nextNode.Kind == currentNode.Kind && currentNode.Ch == nextNode.Ch: 1886case RegexNodeKind.Set when nextNode.Kind == RegexNodeKind.Set && currentNode.Str == nextNode.Str: 1887currentNode.MakeRep(RegexNodeKind.Oneloop, 2, 2); 1892case RegexNodeKind.Beginning or RegexNodeKind.Start or 1893RegexNodeKind.End or RegexNodeKind.EndZ or 1894RegexNodeKind.Bol or RegexNodeKind.Eol or 1895RegexNodeKind.Boundary or RegexNodeKind.NonBoundary or 1896RegexNodeKind.ECMABoundary or RegexNodeKind.NonECMABoundary 1940if (Kind is not RegexNodeKind.Concatenate) 1964while (node.Kind is RegexNodeKind.Capture or RegexNodeKind.Concatenate) 1972case RegexNodeKind.Oneloop or RegexNodeKind.Notoneloop or RegexNodeKind.Setloop when CanBeMadeAtomic(node, subsequent, iterateNullableSubsequent: true, allowLazy: false): 1981case RegexNodeKind.Onelazy or RegexNodeKind.Notonelazy or RegexNodeKind.Setlazy when CanBeMadeAtomic(node, subsequent, iterateNullableSubsequent: false, allowLazy: true): 1997node.Kind -= RegexNodeKind.Onelazy - RegexNodeKind.Oneloop; // lazy to greedy 2001case RegexNodeKind.Loop when CanBeMadeAtomic(node, subsequent, iterateNullableSubsequent: true, allowLazy: false): 2002case RegexNodeKind.Lazyloop when CanBeMadeAtomic(node, subsequent, iterateNullableSubsequent: false, allowLazy: true): 2016while (loopChild.Kind is RegexNodeKind.Capture or RegexNodeKind.Concatenate) 2022RegexNodeKind.Boundary or RegexNodeKind.ECMABoundary or 2023RegexNodeKind.Multi or 2024RegexNodeKind.One or RegexNodeKind.Notone or RegexNodeKind.Set) 2029else if (node.Kind is RegexNodeKind.Loop or RegexNodeKind.Lazyloop) 2033goto case RegexNodeKind.Loop; 2041case RegexNodeKind.Loop: 2051case RegexNodeKind.Lazyloop: 2061case RegexNodeKind.Alternate or RegexNodeKind.BackreferenceConditional or RegexNodeKind.ExpressionConditional: 2072for (int b = node.Kind == RegexNodeKind.ExpressionConditional ? 1 : 0; b < alternateBranches; b++) 2086Debug.Assert(Kind is RegexNodeKind.PositiveLookaround or RegexNodeKind.NegativeLookaround); 2094if (Kind is RegexNodeKind.NegativeLookaround && ContainsKind(Child(0), [RegexNodeKind.Backreference, RegexNodeKind.BackreferenceConditional]) is false) 2109if (node is { Kind: RegexNodeKind.Capture, N: -1 }) 2140if (Kind is RegexNodeKind.PositiveLookaround) 2143child.Kind is RegexNodeKind.Empty) 2148else if (Kind is RegexNodeKind.NegativeLookaround) 2153if (child.Kind is RegexNodeKind.Empty) 2155Kind = RegexNodeKind.Nothing; 2163private static bool IsZeroWidthAssertion(RegexNodeKind kind) => kind is 2164RegexNodeKind.PositiveLookaround or RegexNodeKind.NegativeLookaround or 2165RegexNodeKind.Beginning or RegexNodeKind.Start or 2166RegexNodeKind.Bol or RegexNodeKind.Eol or 2167RegexNodeKind.End or RegexNodeKind.EndZ or 2168RegexNodeKind.Boundary or RegexNodeKind.ECMABoundary or 2169RegexNodeKind.NonBoundary or RegexNodeKind.NonECMABoundary or 2170RegexNodeKind.UpdateBumpalong; 2174private static bool? ContainsKind(RegexNode node, ReadOnlySpan<RegexNodeKind> kinds) 2176foreach (RegexNodeKind kind in kinds) 2206Debug.Assert(Kind == RegexNodeKind.BackreferenceConditional); 2215AddChild(new RegexNode(RegexNodeKind.Empty, Options)); 2224Debug.Assert(Kind == RegexNodeKind.ExpressionConditional); 2233AddChild(new RegexNode(RegexNodeKind.Empty, Options)); 2242if (condition.Kind == RegexNodeKind.PositiveLookaround && (condition.Options & RegexOptions.RightToLeft) == 0) 2269while (node.Kind is RegexNodeKind.Capture or RegexNodeKind.Concatenate) 2287case RegexNodeKind.Concatenate: 2288case RegexNodeKind.Capture: 2289case RegexNodeKind.Atomic: 2293case RegexNodeKind.Loop or RegexNodeKind.Lazyloop when subsequent.M > 0: 2301case RegexNodeKind.PositiveLookaround when (subsequent.Options & RegexOptions.RightToLeft) == 0: 2325case RegexNodeKind.Alternate: 2326case RegexNodeKind.ExpressionConditional when childCount is 3: // condition, yes, and no branch 2341case RegexNodeKind.Oneloop: 2342case RegexNodeKind.Onelazy when allowLazy: 2345case RegexNodeKind.One when node.Ch != subsequent.Ch: 2346case RegexNodeKind.Notone when node.Ch == subsequent.Ch: 2347case RegexNodeKind.Set when !RegexCharClass.CharInClass(node.Ch, subsequent.Str!): 2348case RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic when subsequent.M > 0 && node.Ch != subsequent.Ch: 2349case RegexNodeKind.Notonelazy or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic when subsequent.M > 0 && node.Ch == subsequent.Ch: 2350case RegexNodeKind.Setlazy or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic when subsequent.M > 0 && !RegexCharClass.CharInClass(node.Ch, subsequent.Str!): 2351case RegexNodeKind.Multi when node.Ch != subsequent.Str![0]: 2352case RegexNodeKind.End: 2353case RegexNodeKind.EndZ or RegexNodeKind.Eol when node.Ch != '\n': 2354case RegexNodeKind.Boundary when node.M > 0 && RegexCharClass.IsBoundaryWordChar(node.Ch): 2355case RegexNodeKind.NonBoundary when node.M > 0 && !RegexCharClass.IsBoundaryWordChar(node.Ch): 2356case RegexNodeKind.ECMABoundary when node.M > 0 && RegexCharClass.IsECMAWordChar(node.Ch): 2357case RegexNodeKind.NonECMABoundary when node.M > 0 && !RegexCharClass.IsECMAWordChar(node.Ch): 2360case RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic when subsequent.M == 0 && node.Ch != subsequent.Ch: 2361case RegexNodeKind.Notonelazy or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic when subsequent.M == 0 && node.Ch == subsequent.Ch: 2362case RegexNodeKind.Setlazy or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic when subsequent.M == 0 && !RegexCharClass.CharInClass(node.Ch, subsequent.Str!): 2371case RegexNodeKind.Notoneloop: 2372case RegexNodeKind.Notonelazy when allowLazy: 2375case RegexNodeKind.One when node.Ch == subsequent.Ch: 2376case RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic when subsequent.M > 0 && node.Ch == subsequent.Ch: 2377case RegexNodeKind.Multi when node.Ch == subsequent.Str![0]: 2378case RegexNodeKind.End: 2381case RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic when subsequent.M == 0 && node.Ch == subsequent.Ch: 2390case RegexNodeKind.Setloop: 2391case RegexNodeKind.Setlazy when allowLazy: 2394case RegexNodeKind.One when !RegexCharClass.CharInClass(subsequent.Ch, node.Str!): 2395case RegexNodeKind.Set when !RegexCharClass.MayOverlap(node.Str!, subsequent.Str!): 2396case RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic when subsequent.M > 0 && !RegexCharClass.CharInClass(subsequent.Ch, node.Str!): 2397case RegexNodeKind.Setlazy or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic when subsequent.M > 0 && !RegexCharClass.MayOverlap(node.Str!, subsequent.Str!): 2398case RegexNodeKind.Multi when !RegexCharClass.CharInClass(subsequent.Str![0], node.Str!): 2399case RegexNodeKind.End: 2400case RegexNodeKind.EndZ or RegexNodeKind.Eol when !RegexCharClass.CharInClass('\n', node.Str!): 2401case RegexNodeKind.Boundary when node.M > 0 && RegexCharClass.IsKnownWordClassSubset(node.Str!): 2402case RegexNodeKind.NonBoundary when node.M > 0 && node.Str is RegexCharClass.NotWordClass or RegexCharClass.NotDigitClass: 2403case RegexNodeKind.ECMABoundary when node.M > 0 && node.Str is RegexCharClass.ECMAWordClass or RegexCharClass.ECMADigitClass: 2404case RegexNodeKind.NonECMABoundary when node.M > 0 && node.Str is RegexCharClass.NotECMAWordClass or RegexCharClass.NotDigitClass: 2407case RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic when subsequent.M == 0 && !RegexCharClass.CharInClass(subsequent.Ch, node.Str!): 2408case RegexNodeKind.Setlazy or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic when subsequent.M == 0 && !RegexCharClass.MayOverlap(node.Str!, subsequent.Str!): 2417case RegexNodeKind.Loop: 2418case RegexNodeKind.Lazyloop when allowLazy: 2441case RegexNodeKind.One when !CharInStartingOrEndingSet(subsequent.Ch): 2442case RegexNodeKind.Set when !MayOverlapStartingOrEndingSet(subsequent.Str!): 2443case RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic when subsequent.M > 0 && !CharInStartingOrEndingSet(subsequent.Ch): 2444case RegexNodeKind.Setlazy or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic when subsequent.M > 0 && !MayOverlapStartingOrEndingSet(subsequent.Str!): 2445case RegexNodeKind.Multi when !CharInStartingOrEndingSet(subsequent.Str![0]): 2446case RegexNodeKind.End: 2447case RegexNodeKind.EndZ or RegexNodeKind.Eol when !CharInStartingOrEndingSet('\n'): 2448case RegexNodeKind.Boundary when node.M > 0 && RegexCharClass.IsKnownWordClassSubset(loopStartingSet) && RegexCharClass.IsKnownWordClassSubset(loopEndingSet): 2449case RegexNodeKind.NonBoundary when node.M > 0 && (loopStartingSet is RegexCharClass.NotWordClass or RegexCharClass.NotDigitClass) && (loopEndingSet is RegexCharClass.NotWordClass or RegexCharClass.NotDigitClass): 2450case RegexNodeKind.ECMABoundary when node.M > 0 && (loopStartingSet is RegexCharClass.ECMAWordClass or RegexCharClass.ECMADigitClass) && (loopEndingSet is RegexCharClass.ECMAWordClass or RegexCharClass.ECMADigitClass): 2451case RegexNodeKind.NonECMABoundary when node.M > 0 && (loopStartingSet is RegexCharClass.NotECMAWordClass or RegexCharClass.NotDigitClass) && (loopEndingSet is RegexCharClass.NotECMAWordClass or RegexCharClass.NotDigitClass): 2454case RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic when subsequent.M == 0 && !CharInStartingOrEndingSet(subsequent.Ch): 2455case RegexNodeKind.Setlazy or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic when subsequent.M == 0 && !MayOverlapStartingOrEndingSet(subsequent.Str!): 2483case RegexNodeKind.Atomic: 2484case RegexNodeKind.Alternate: 2485case RegexNodeKind.Capture: 2489case RegexNodeKind.Concatenate: 2528Debug.Assert(node.Kind is not RegexNodeKind.Concatenate, "The existing logic assumes that the node itself isn't a concatenation."); 2541case RegexNodeKind.Atomic: 2542case RegexNodeKind.Alternate: 2543case RegexNodeKind.Capture: 2547case RegexNodeKind.Concatenate: 2583case RegexNodeKind.One: 2584case RegexNodeKind.Notone: 2585case RegexNodeKind.Set: 2589case RegexNodeKind.Multi: 2593case RegexNodeKind.Notonelazy: 2594case RegexNodeKind.Notoneloop: 2595case RegexNodeKind.Notoneloopatomic: 2596case RegexNodeKind.Onelazy: 2597case RegexNodeKind.Oneloop: 2598case RegexNodeKind.Oneloopatomic: 2599case RegexNodeKind.Setlazy: 2600case RegexNodeKind.Setloop: 2601case RegexNodeKind.Setloopatomic: 2605case RegexNodeKind.Lazyloop: 2606case RegexNodeKind.Loop: 2610case RegexNodeKind.Alternate: 2623case RegexNodeKind.BackreferenceConditional: 2627case RegexNodeKind.ExpressionConditional: 2631case RegexNodeKind.Concatenate: 2643case RegexNodeKind.Atomic: 2644case RegexNodeKind.Capture: 2645case RegexNodeKind.Group: 2650case RegexNodeKind.Empty: 2651case RegexNodeKind.Nothing: 2652case RegexNodeKind.UpdateBumpalong: 2656case RegexNodeKind.Beginning: 2657case RegexNodeKind.Bol: 2658case RegexNodeKind.Boundary: 2659case RegexNodeKind.ECMABoundary: 2660case RegexNodeKind.End: 2661case RegexNodeKind.EndZ: 2662case RegexNodeKind.Eol: 2663case RegexNodeKind.NonBoundary: 2664case RegexNodeKind.NonECMABoundary: 2665case RegexNodeKind.Start: 2666case RegexNodeKind.NegativeLookaround: 2667case RegexNodeKind.PositiveLookaround: 2669case RegexNodeKind.Backreference: 2677goto case RegexNodeKind.Empty; 2696case RegexNodeKind.One: 2697case RegexNodeKind.Notone: 2698case RegexNodeKind.Set: 2702case RegexNodeKind.Multi: 2706case RegexNodeKind.Notonelazy or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or 2707RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or 2708RegexNodeKind.Setlazy or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic: 2712case RegexNodeKind.Loop or RegexNodeKind.Lazyloop: 2727case RegexNodeKind.Alternate: 2750case RegexNodeKind.BackreferenceConditional: 2751case RegexNodeKind.ExpressionConditional: 2754int i = Kind == RegexNodeKind.BackreferenceConditional ? 0 : 1; 2760case RegexNodeKind.Concatenate: 2782case RegexNodeKind.Atomic: 2783case RegexNodeKind.Capture: 2788case RegexNodeKind.Empty: 2789case RegexNodeKind.Nothing: 2790case RegexNodeKind.UpdateBumpalong: 2791case RegexNodeKind.Beginning: 2792case RegexNodeKind.Bol: 2793case RegexNodeKind.Boundary: 2794case RegexNodeKind.ECMABoundary: 2795case RegexNodeKind.End: 2796case RegexNodeKind.EndZ: 2797case RegexNodeKind.Eol: 2798case RegexNodeKind.NonBoundary: 2799case RegexNodeKind.NonECMABoundary: 2800case RegexNodeKind.Start: 2801case RegexNodeKind.PositiveLookaround: 2802case RegexNodeKind.NegativeLookaround: 2806case RegexNodeKind.Backreference: 2814goto case RegexNodeKind.Empty; 2837Debug.Assert(Kind == RegexNodeKind.Concatenate, $"Expected Concatenate, got {Kind}"); 2850if (child.Kind is RegexNodeKind.One) 2863else if (child.Kind is RegexNodeKind.Multi) 2875else if (child.Kind is RegexNodeKind.Set || 2876(child.Kind is RegexNodeKind.Setloop or RegexNodeKind.Setlazy or RegexNodeKind.Setloopatomic && child.M == child.N)) 2885vsb.Append((char)(twoChars[0] | 0x20), child.Kind is RegexNodeKind.Set ? 1 : child.M); 2887else if (child.Kind is RegexNodeKind.Empty) 2938Debug.Assert(Kind == RegexNodeKind.Concatenate, $"Expected Concatenate, got {Kind}"); 2942RegexNodeKind.One or RegexNodeKind.Notone or RegexNodeKind.Set => true, 2943RegexNodeKind.Multi => true, 2944RegexNodeKind.Oneloop or RegexNodeKind.Onelazy or RegexNodeKind.Oneloopatomic or 2945RegexNodeKind.Notoneloop or RegexNodeKind.Notonelazy or RegexNodeKind.Notoneloopatomic or 2946RegexNodeKind.Setloop or RegexNodeKind.Setlazy or RegexNodeKind.Setloopatomic 2988return new RegexNode(RegexNodeKind.Empty, Options); 2994case <= MultiVsRepeaterLimit when Kind == RegexNodeKind.One: 3000Kind = RegexNodeKind.Multi; 3009case RegexNodeKind.One: 3010case RegexNodeKind.Notone: 3011case RegexNodeKind.Set: 3012MakeRep(lazy ? RegexNodeKind.Onelazy : RegexNodeKind.Oneloop, min, max); 3016var result = new RegexNode(lazy ? RegexNodeKind.Lazyloop : RegexNodeKind.Loop, Options, min, max); 3139public bool IsSetFamily => Kind is RegexNodeKind.Set or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic or RegexNodeKind.Setlazy; 3142public bool IsOneFamily => Kind is RegexNodeKind.One or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Onelazy; 3145public bool IsNotoneFamily => Kind is RegexNodeKind.Notone or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Notonelazy; 3196case RegexNodeKind.Oneloop: 3197case RegexNodeKind.Oneloopatomic: 3198case RegexNodeKind.Notoneloop: 3199case RegexNodeKind.Notoneloopatomic: 3200case RegexNodeKind.Onelazy: 3201case RegexNodeKind.Notonelazy: 3202case RegexNodeKind.One: 3203case RegexNodeKind.Notone: 3206case RegexNodeKind.Capture: 3213case RegexNodeKind.Backreference: 3214case RegexNodeKind.BackreferenceConditional: 3217case RegexNodeKind.Multi: 3225case RegexNodeKind.Set: 3226case RegexNodeKind.Setloop: 3227case RegexNodeKind.Setloopatomic: 3228case RegexNodeKind.Setlazy: 3235case RegexNodeKind.Oneloop: 3236case RegexNodeKind.Oneloopatomic: 3237case RegexNodeKind.Notoneloop: 3238case RegexNodeKind.Notoneloopatomic: 3239case RegexNodeKind.Onelazy: 3240case RegexNodeKind.Notonelazy: 3241case RegexNodeKind.Setloop: 3242case RegexNodeKind.Setloopatomic: 3243case RegexNodeKind.Setlazy: 3244case RegexNodeKind.Loop: 3245case RegexNodeKind.Lazyloop:

277StartGroup(new RegexNode(RegexNodeKind.Capture, (_options & ~RegexOptions.IgnoreCase), 0, -1)); 347_unit = new RegexNode(RegexNodeKind.Set, _options & ~RegexOptions.IgnoreCase, setString); 394_unit = new RegexNode((_options & RegexOptions.Multiline) != 0 ? RegexNodeKind.Bol : RegexNodeKind.Beginning, _options); 398_unit = new RegexNode((_options & RegexOptions.Multiline) != 0 ? RegexNodeKind.Eol : RegexNodeKind.EndZ, _options); 403new RegexNode(RegexNodeKind.Set, _options & ~RegexOptions.IgnoreCase, RegexCharClass.AnyClass) : 404new RegexNode(RegexNodeKind.Notone, _options & ~RegexOptions.IgnoreCase, '\n'); 521_concatenation = new RegexNode(RegexNodeKind.Concatenate, _options); 759return new RegexNode(RegexNodeKind.Group, _options); 763return new RegexNode(RegexNodeKind.Capture, _options, _autocap++, -1); 776RegexNodeKind nodeType; 783nodeType = RegexNodeKind.Group; 789nodeType = RegexNodeKind.PositiveLookaround; 795nodeType = RegexNodeKind.NegativeLookaround; 800nodeType = RegexNodeKind.Atomic; 823nodeType = RegexNodeKind.PositiveLookaround; 834nodeType = RegexNodeKind.NegativeLookaround; 937return new RegexNode(RegexNodeKind.Capture, _options, capnum, uncapnum); 959return new RegexNode(RegexNodeKind.BackreferenceConditional, _options, capnum); 973return new RegexNode(RegexNodeKind.BackreferenceConditional, _options, tmpCapnum); 978nodeType = RegexNodeKind.ExpressionConditional; 1002nodeType = RegexNodeKind.Group; 1004if (_group!.Kind != RegexNodeKind.ExpressionConditional) 1096new RegexNode(RegexNodeKind.Set, (_options & ~RegexOptions.IgnoreCase), (_options & RegexOptions.ECMAScript) != 0 ? RegexCharClass.ECMAWordClass : RegexCharClass.WordClass); 1101new RegexNode(RegexNodeKind.Set, (_options & ~RegexOptions.IgnoreCase), (_options & RegexOptions.ECMAScript) != 0 ? RegexCharClass.NotECMAWordClass : RegexCharClass.NotWordClass); 1106new RegexNode(RegexNodeKind.Set, (_options & ~RegexOptions.IgnoreCase), (_options & RegexOptions.ECMAScript) != 0 ? RegexCharClass.ECMASpaceClass : RegexCharClass.SpaceClass); 1111new RegexNode(RegexNodeKind.Set, (_options & ~RegexOptions.IgnoreCase), (_options & RegexOptions.ECMAScript) != 0 ? RegexCharClass.NotECMASpaceClass : RegexCharClass.NotSpaceClass); 1116new RegexNode(RegexNodeKind.Set, (_options & ~RegexOptions.IgnoreCase), (_options & RegexOptions.ECMAScript) != 0 ? RegexCharClass.ECMADigitClass : RegexCharClass.DigitClass); 1121new RegexNode(RegexNodeKind.Set, (_options & ~RegexOptions.IgnoreCase), (_options & RegexOptions.ECMAScript) != 0 ? RegexCharClass.NotECMADigitClass : RegexCharClass.NotDigitClass); 1138return new RegexNode(RegexNodeKind.Set, (_options & ~RegexOptions.IgnoreCase), cc.ToStringClass()); 1142if (result != null && result.Kind == RegexNodeKind.Backreference && (result.Options & RegexOptions.IgnoreCase) != 0) 1203IsCaptureSlot(capnum) ? new RegexNode(RegexNodeKind.Backreference, _options, capnum) : 1235return scanOnly ? null : new RegexNode(RegexNodeKind.Backreference, _options, capnum); 1249return new RegexNode(RegexNodeKind.Backreference, _options, capnum); 1269_capnames?[capname] is int tmpCapnum ? new RegexNode(RegexNodeKind.Backreference, _options, tmpCapnum) : 1345return new RegexNode(RegexNodeKind.Backreference, _options, capnum); 1355return new RegexNode(RegexNodeKind.Backreference, _options, capnum); 1367return new RegexNode(RegexNodeKind.Backreference, _options, tmpCapnum); 1405return new RegexNode(RegexNodeKind.Backreference, _options, capnum); 1653private readonly RegexNodeKind TypeFromCode(char ch) => 1656'b' => (_options & RegexOptions.ECMAScript) != 0 ? RegexNodeKind.ECMABoundary : RegexNodeKind.Boundary, 1657'B' => (_options & RegexOptions.ECMAScript) != 0 ? RegexNodeKind.NonECMABoundary : RegexNodeKind.NonBoundary, 1658'A' => RegexNodeKind.Beginning, 1659'G' => RegexNodeKind.Start, 1660'Z' => RegexNodeKind.EndZ, 1661'z' => RegexNodeKind.End, 1662_ => RegexNodeKind.Nothing, 2004_concatenation!.AddChild(new RegexNode(RegexNodeKind.Multi, _options & ~RegexOptions.IgnoreCase, _pattern.Substring(pos, cch))); 2034if (_group.Kind == RegexNodeKind.ExpressionConditional && _group.ChildCount() == 0) 2050_alternation = new RegexNode(RegexNodeKind.Alternate, _options); 2051_concatenation = new RegexNode(RegexNodeKind.Concatenate, _options); 2059if (_group!.Kind is RegexNodeKind.ExpressionConditional or RegexNodeKind.BackreferenceConditional) 2068_concatenation = new RegexNode(RegexNodeKind.Concatenate, _options); 2074if (_group!.Kind is RegexNodeKind.ExpressionConditional or RegexNodeKind.BackreferenceConditional) 2078if (_group.Kind == RegexNodeKind.BackreferenceConditional && _group.ChildCount() > 2 || _group.ChildCount() > 3)

84case RegexNodeKind.Atomic: 85case RegexNodeKind.Capture: 90case RegexNodeKind.Bol: 91case RegexNodeKind.Eol: 92case RegexNodeKind.Boundary: 93case RegexNodeKind.ECMABoundary: 94case RegexNodeKind.NonBoundary: 95case RegexNodeKind.NonECMABoundary: 96case RegexNodeKind.Beginning: 97case RegexNodeKind.Start: 98case RegexNodeKind.EndZ: 99case RegexNodeKind.End: 100case RegexNodeKind.Empty: 101case RegexNodeKind.UpdateBumpalong: 102case RegexNodeKind.PositiveLookaround: 103case RegexNodeKind.NegativeLookaround: 112case RegexNodeKind.One or RegexNodeKind.Oneloop or RegexNodeKind.Onelazy or RegexNodeKind.Oneloopatomic when !ignoreCase || !RegexCharClass.ParticipatesInCaseConversion(node.Ch): 114int reps = node.Kind is RegexNodeKind.One ? 1 : Math.Min(node.M, MaxPrefixLength); 119return node.Kind is RegexNodeKind.One || reps == node.N; 124case RegexNodeKind.Multi: 156case RegexNodeKind.Set or RegexNodeKind.Setloop or RegexNodeKind.Setlazy or RegexNodeKind.Setloopatomic when !RegexCharClass.IsNegated(node.Str!): // negated sets are too complex to analyze 164int reps = node.Kind is RegexNodeKind.Set ? 1 : Math.Min(node.M, MaxPrefixLength); 209return node.Kind is RegexNodeKind.Set || reps == node.N; 212case RegexNodeKind.Concatenate: 226case RegexNodeKind.Loop or RegexNodeKind.Lazyloop when node.M > 0: 242case RegexNodeKind.Alternate: 363case RegexNodeKind.Concatenate: 377case RegexNodeKind.Alternate when !rtl: // for RTL we'd need to be matching the suffixes of the alternation cases 422case RegexNodeKind.One: 427case RegexNodeKind.Multi: 432case RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Onelazy when node.M > 0: 439case RegexNodeKind.Loop or RegexNodeKind.Lazyloop when node.M > 0: 454case RegexNodeKind.Atomic: 455case RegexNodeKind.Capture: 459case RegexNodeKind.Bol: 460case RegexNodeKind.Eol: 461case RegexNodeKind.Boundary: 462case RegexNodeKind.ECMABoundary: 463case RegexNodeKind.NonBoundary: 464case RegexNodeKind.NonECMABoundary: 465case RegexNodeKind.Beginning: 466case RegexNodeKind.Start: 467case RegexNodeKind.EndZ: 468case RegexNodeKind.End: 469case RegexNodeKind.Empty: 470case RegexNodeKind.UpdateBumpalong: 471case RegexNodeKind.PositiveLookaround: 472case RegexNodeKind.NegativeLookaround: 491case RegexNodeKind.Atomic: 492case RegexNodeKind.Capture: 493case RegexNodeKind.Loop or RegexNodeKind.Lazyloop when node.M > 0: 497case RegexNodeKind.Concatenate: 600case RegexNodeKind.One: 609case RegexNodeKind.Onelazy or RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic when node.M > 0: 621case RegexNodeKind.Multi: 633case RegexNodeKind.Set: 641case RegexNodeKind.Setlazy or RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic when node.M > 0: 652case RegexNodeKind.Notone: 658case RegexNodeKind.Notonelazy or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic when node.M == node.N: 662case RegexNodeKind.Beginning: 663case RegexNodeKind.Bol: 664case RegexNodeKind.Boundary: 665case RegexNodeKind.ECMABoundary: 666case RegexNodeKind.Empty: 667case RegexNodeKind.End: 668case RegexNodeKind.EndZ: 669case RegexNodeKind.Eol: 670case RegexNodeKind.NonBoundary: 671case RegexNodeKind.NonECMABoundary: 672case RegexNodeKind.UpdateBumpalong: 673case RegexNodeKind.Start: 674case RegexNodeKind.NegativeLookaround: 675case RegexNodeKind.PositiveLookaround: 681case RegexNodeKind.Atomic: 682case RegexNodeKind.Group: 683case RegexNodeKind.Capture: 686case RegexNodeKind.Lazyloop or RegexNodeKind.Loop when node.M > 0: 696case RegexNodeKind.Concatenate: 709case RegexNodeKind.Alternate when thorough: 954case RegexNodeKind.One or RegexNodeKind.Oneloop or RegexNodeKind.Onelazy or RegexNodeKind.Oneloopatomic: 959return node.Kind is RegexNodeKind.One || node.M > 0 ? true : null; 963case RegexNodeKind.Notone or RegexNodeKind.Notoneloop or RegexNodeKind.Notoneloopatomic or RegexNodeKind.Notonelazy: 977return node.Kind is RegexNodeKind.Notone || node.M > 0 ? true : null; 981case RegexNodeKind.Set or RegexNodeKind.Setloop or RegexNodeKind.Setlazy or RegexNodeKind.Setloopatomic: 996node.Kind is RegexNodeKind.Set || node.M > 0 ? true : 1000case RegexNodeKind.Multi: 1012case RegexNodeKind.Empty: 1013case RegexNodeKind.Nothing: 1014case RegexNodeKind.Bol: 1015case RegexNodeKind.Eol: 1016case RegexNodeKind.Boundary: 1017case RegexNodeKind.NonBoundary: 1018case RegexNodeKind.ECMABoundary: 1019case RegexNodeKind.NonECMABoundary: 1020case RegexNodeKind.Beginning: 1021case RegexNodeKind.Start: 1022case RegexNodeKind.EndZ: 1023case RegexNodeKind.End: 1024case RegexNodeKind.UpdateBumpalong: 1025case RegexNodeKind.PositiveLookaround: 1026case RegexNodeKind.NegativeLookaround: 1030case RegexNodeKind.Atomic: 1031case RegexNodeKind.Capture: 1037case RegexNodeKind.Loop: 1038case RegexNodeKind.Lazyloop: 1050case RegexNodeKind.Concatenate: 1081case RegexNodeKind.Alternate: 1102case RegexNodeKind.BackreferenceConditional: 1103case RegexNodeKind.ExpressionConditional: 1104int branchStart = node.Kind is RegexNodeKind.BackreferenceConditional ? 0 : 1; 1113case RegexNodeKind.Backreference: 1138while (node.Kind is RegexNodeKind.Atomic or RegexNodeKind.Capture) 1142if (node.Kind != RegexNodeKind.Concatenate) 1155while (firstChild.Kind is RegexNodeKind.Atomic or RegexNodeKind.Capture) 1159if (firstChild.Kind is not (RegexNodeKind.Setloop or RegexNodeKind.Setloopatomic or RegexNodeKind.Setlazy) || firstChild.N != int.MaxValue) 1167if (nextChild.Kind == RegexNodeKind.UpdateBumpalong) 1224while ((nextChild.Kind is RegexNodeKind.Atomic or RegexNodeKind.Capture or RegexNodeKind.Concatenate) || 1225(nextChild.Kind is RegexNodeKind.Loop or RegexNodeKind.Lazyloop && nextChild.M >= 1)) 1233(nextChild.Kind is RegexNodeKind.Set || nextChild.M >= 1)) 1279case RegexNodeKind.PositiveLookaround: 1284case RegexNodeKind.Bol: 1285case RegexNodeKind.Eol: 1286case RegexNodeKind.Beginning: 1287case RegexNodeKind.Start: 1288case RegexNodeKind.EndZ: 1289case RegexNodeKind.End: 1290case RegexNodeKind.Boundary: 1291case RegexNodeKind.ECMABoundary: 1292case RegexNodeKind.NegativeLookaround: 1293case RegexNodeKind.Empty: 1297case RegexNodeKind.Atomic: 1298case RegexNodeKind.Capture: 1303case RegexNodeKind.Loop or RegexNodeKind.Lazyloop when node.M >= 1: 1309case RegexNodeKind.Concatenate: 1330public static RegexNodeKind FindLeadingAnchor(RegexNode node) => 1334public static RegexNodeKind FindTrailingAnchor(RegexNode node) => 1338private static RegexNodeKind FindLeadingOrTrailingAnchor(RegexNode node, bool leading) 1344return RegexNodeKind.Unknown; 1351case RegexNodeKind.Bol: 1352case RegexNodeKind.Eol: 1353case RegexNodeKind.Beginning: 1354case RegexNodeKind.Start: 1355case RegexNodeKind.EndZ: 1356case RegexNodeKind.End: 1360case RegexNodeKind.Atomic: 1361case RegexNodeKind.Capture: 1362case RegexNodeKind.Loop or RegexNodeKind.Lazyloop when leading && node.M >= 1: 1363case RegexNodeKind.PositiveLookaround when leading && (node.Options & RegexOptions.RightToLeft) == 0: 1373case RegexNodeKind.Concatenate: 1380RegexNodeKind bestAnchorFound = RegexNodeKind.Unknown; 1388case RegexNodeKind.Empty or RegexNodeKind.NegativeLookaround: 1389case RegexNodeKind.PositiveLookaround when ((node.Options | tmpChild.Options) & RegexOptions.RightToLeft) != 0: 1390case RegexNodeKind.Boundary or RegexNodeKind.ECMABoundary or RegexNodeKind.NonBoundary or RegexNodeKind.NonECMABoundary: 1394case RegexNodeKind.PositiveLookaround: 1416if (node.Child(i).Kind is not (RegexNodeKind.Empty or RegexNodeKind.PositiveLookaround or RegexNodeKind.NegativeLookaround)) 1424if (bestAnchorFound is not RegexNodeKind.Unknown) 1446static RegexNodeKind ChooseBetterAnchor(RegexNodeKind anchor1, RegexNodeKind anchor2) 1449anchor1 == RegexNodeKind.Unknown ? anchor2 : 1450anchor2 == RegexNodeKind.Unknown ? anchor1 : 1454static int RankAnchorQuality(RegexNodeKind node) => 1457RegexNodeKind.Beginning => 3, 1458RegexNodeKind.Start => 3, 1459RegexNodeKind.End => 3, 1460RegexNodeKind.EndZ => 3, 1462RegexNodeKind.Bol => 2, 1463RegexNodeKind.Eol => 2, 1465RegexNodeKind.Boundary => 1, 1466RegexNodeKind.ECMABoundary => 1, 1472static bool IsBestAnchor(RegexNodeKind anchor) => 1474anchor is RegexNodeKind.Beginning or RegexNodeKind.Start or RegexNodeKind.End or RegexNodeKind.EndZ; 1477case RegexNodeKind.Alternate: 1481RegexNodeKind anchor = FindLeadingOrTrailingAnchor(node.Child(0), leading); 1482if (anchor == RegexNodeKind.Unknown) 1484return RegexNodeKind.Unknown; 1494return RegexNodeKind.Unknown; 1504return RegexNodeKind.Unknown;

36Debug.Assert(concat.Kind == RegexNodeKind.Concatenate, $"Expected Concatenate, got {concat.Kind}"); 50case RegexNodeKind.Multi: 54case RegexNodeKind.One: 58case RegexNodeKind.Backreference:

49case RegexNodeKind.Alternate: 50case RegexNodeKind.Loop or RegexNodeKind.Lazyloop when node.M != node.N: 51case RegexNodeKind.Oneloop or RegexNodeKind.Notoneloop or RegexNodeKind.Setloop or RegexNodeKind.Onelazy or RegexNodeKind.Notonelazy or RegexNodeKind.Setlazy when node.M != node.N: 63case RegexNodeKind.Atomic: 64case RegexNodeKind.NegativeLookaround: 65case RegexNodeKind.PositiveLookaround: 70case RegexNodeKind.Capture: 75case RegexNodeKind.Loop: 76case RegexNodeKind.Lazyloop: 94RegexNodeKind.Atomic or RegexNodeKind.NegativeLookaround or RegexNodeKind.PositiveLookaround => true, 98RegexNodeKind.Alternate or RegexNodeKind.BackreferenceConditional or RegexNodeKind.ExpressionConditional => true, 101RegexNodeKind.Capture => true, 105RegexNodeKind.Concatenate => i == childCount - 1, 111RegexNodeKind.Loop or RegexNodeKind.Lazyloop when node.N == 1 => true,

14private const RegexNodeKind BeforeChild = (RegexNodeKind)64; 15private const RegexNodeKind AfterChild = (RegexNodeKind)128; 201private void EmitFragment(RegexNodeKind nodeType, RegexNode node, int curIndex) 215case RegexNodeKind.Concatenate | BeforeChild: 216case RegexNodeKind.Concatenate | AfterChild: 217case RegexNodeKind.Empty: 220case RegexNodeKind.Alternate | BeforeChild: 228case RegexNodeKind.Alternate | AfterChild: 247case RegexNodeKind.BackreferenceConditional | BeforeChild: 260case RegexNodeKind.BackreferenceConditional | AfterChild: 278case RegexNodeKind.ExpressionConditional | BeforeChild: 290case RegexNodeKind.ExpressionConditional | AfterChild: 311case RegexNodeKind.Loop | BeforeChild: 312case RegexNodeKind.Lazyloop | BeforeChild: 327case RegexNodeKind.Loop | AfterChild: 328case RegexNodeKind.Lazyloop | AfterChild: 331int Lazy = (nodeType - (RegexNodeKind.Loop | AfterChild)); 343case RegexNodeKind.Capture | BeforeChild: 347case RegexNodeKind.Capture | AfterChild: 351case RegexNodeKind.PositiveLookaround | BeforeChild: 356case RegexNodeKind.PositiveLookaround | AfterChild: 361case RegexNodeKind.NegativeLookaround | BeforeChild: 367case RegexNodeKind.NegativeLookaround | AfterChild: 373case RegexNodeKind.Atomic | BeforeChild: 377case RegexNodeKind.Atomic | AfterChild: 381case RegexNodeKind.One: 382case RegexNodeKind.Notone: 386case RegexNodeKind.Notoneloop: 387case RegexNodeKind.Notoneloopatomic: 388case RegexNodeKind.Notonelazy: 389case RegexNodeKind.Oneloop: 390case RegexNodeKind.Oneloopatomic: 391case RegexNodeKind.Onelazy: 394Emit(((node.Kind is RegexNodeKind.Oneloop or RegexNodeKind.Oneloopatomic or RegexNodeKind.Onelazy) ? 403case RegexNodeKind.Setloop: 404case RegexNodeKind.Setloopatomic: 405case RegexNodeKind.Setlazy: 419case RegexNodeKind.Multi: 423case RegexNodeKind.Set: 427case RegexNodeKind.Backreference: 431case RegexNodeKind.Nothing: 432case RegexNodeKind.Bol: 433case RegexNodeKind.Eol: 434case RegexNodeKind.Boundary: 435case RegexNodeKind.NonBoundary: 436case RegexNodeKind.ECMABoundary: 437case RegexNodeKind.NonECMABoundary: 438case RegexNodeKind.Beginning: 439case RegexNodeKind.Start: 440case RegexNodeKind.EndZ: 441case RegexNodeKind.End: 442case RegexNodeKind.UpdateBumpalong:

57case RegexNodeKind.One: 61case RegexNodeKind.Notone: 65case RegexNodeKind.Set: 69case RegexNodeKind.Multi: 84case RegexNodeKind.Concatenate: 85case RegexNodeKind.Alternate: 86case RegexNodeKind.Loop: 87case RegexNodeKind.Lazyloop: 88case RegexNodeKind.Capture when node.N == -1: // N == -1 because balancing groups (which have N >= 0) aren't supported 106case RegexNodeKind.Oneloop: 107case RegexNodeKind.Onelazy: 108case RegexNodeKind.Notoneloop: 109case RegexNodeKind.Notonelazy: 117result.AddLast(_builder.CreateLoop(_builder.CreateSingleton(bdd), node.Kind is RegexNodeKind.Onelazy or RegexNodeKind.Notonelazy, node.M, node.N)); 121case RegexNodeKind.Setloop: 122case RegexNodeKind.Setlazy: 128result.AddLast(_builder.CreateLoop(_builder.CreateSingleton(setBdd), node.Kind == RegexNodeKind.Setlazy, node.M, node.N)); 132case RegexNodeKind.Empty: 133case RegexNodeKind.UpdateBumpalong: // UpdateBumpalong is a directive relevant only to backtracking and can be ignored just like Empty 136case RegexNodeKind.Nothing: 142case RegexNodeKind.Beginning: 146case RegexNodeKind.Bol: 151case RegexNodeKind.End: // \z anchor 155case RegexNodeKind.EndZ: // \Z anchor 160case RegexNodeKind.Eol: 165case RegexNodeKind.Boundary: 170case RegexNodeKind.NonBoundary: 180RegexNodeKind.Atomic or RegexNodeKind.Setloopatomic or RegexNodeKind.Oneloopatomic or RegexNodeKind.Notoneloopatomic => SR.ExpressionDescription_AtomicSubexpressions, 181RegexNodeKind.Backreference => SR.ExpressionDescription_Backreference, 182RegexNodeKind.BackreferenceConditional => SR.ExpressionDescription_Conditional, 183RegexNodeKind.Capture => SR.ExpressionDescription_BalancingGroup, 184RegexNodeKind.ExpressionConditional => SR.ExpressionDescription_IfThenElse, 185RegexNodeKind.NegativeLookaround => SR.ExpressionDescription_NegativeLookaround, 186RegexNodeKind.PositiveLookaround => SR.ExpressionDescription_PositiveLookaround, 187RegexNodeKind.Start => SR.ExpressionDescription_ContiguousMatches, 195string description = $"Unexpected ({nameof(RegexNodeKind)}: {node.Kind})"; 211case RegexNodeKind.Concatenate: 221case RegexNodeKind.Alternate: 250case RegexNodeKind.Loop: 251case RegexNodeKind.Lazyloop: 260result.AddLast(_builder.CreateLoop(body, node.Kind == RegexNodeKind.Lazyloop, node.M, node.N)); 267Debug.Assert(node.Kind == RegexNodeKind.Capture && node.N == -1); 285Debug.Assert(rootResult.Count == 1 || root.Kind == RegexNodeKind.Concatenate || root.Kind == RegexNodeKind.Capture); 312Debug.Assert(node.Kind == RegexNodeKind.Set);

9/// <summary>An empty node that matches a zero-width input (e.g. <see cref="RegexNodeKind.Empty"/>).</summary> 11/// <summary>A node that matches a single character (i.e. <see cref="RegexNodeKind.One"/>, <see cref="RegexNodeKind.Notone"/>, or <see cref="RegexNodeKind.Set"/>).</summary> 13/// <summary>A node that matches a sequence of nodes (i.e. <see cref="RegexNodeKind.Concatenate"/>).</summary> 15/// <summary>A node that matches a loop (e.g. <see cref="RegexNodeKind.Loop"/>, <see cref="RegexNodeKind.Lazyloop"/>, <see cref="RegexNodeKind.Setloop"/>, etc.).</summary> 17/// <summary>A node that matches if any of its nodes match and that matches them in a fixed order that mirrors how the backtracking engines operate (e.g. <see cref="RegexNodeKind.Alternate"/>).</summary> 20/// <summary>A node that represents a beginning anchor (i.e. <see cref="RegexNodeKind.Beginning"/>).</summary> 22/// <summary>A node that represents an ending anchor (i.e. <see cref="RegexNodeKind.End"/>).</summary> 24/// <summary>A node that represents an ending \Z anchor (i.e. <see cref="RegexNodeKind.EndZ"/>).</summary> 28/// <summary>A node that represents a beginning-of-line anchor (i.e. <see cref="RegexNodeKind.Bol"/>).</summary> 30/// <summary>A node that represents a end-of-line anchor (i.e. <see cref="RegexNodeKind.Eol"/>).</summary> 32/// <summary>A node that represents a word boundary anchor (i.e. <see cref="RegexNodeKind.Boundary"/>).</summary> 34/// <summary>A node that represents a word non-boundary anchor (i.e. <see cref="RegexNodeKind.NonBoundary"/>).</summary>

211findOptimizations.LeadingAnchor is not RegexNodeKind.Beginning)