meet difficult problem on COUNT node

2026-09-11 17:29:42 +08:00
parent f372f83171
commit 5a3286dc21
4 changed files with 188 additions and 70 deletions
@@ -180,6 +180,50 @@ namespace Nitload.RegularAnalysis.Text

            #endregion

+        #region CONCAT continuation
+
+        private static void AppendConcatNodes(
+                            RegexAstNode node,
+                            List<RegexAstNode> sequence
+        )
+        {
+            if (RegexAstNode.IsNullOrEmpty(node)) {
+                return;
+            }
+            if (node.Label == RegexElementLabel.CONCAT &&
+                !RegexAstNode.IsDotStar(node.Left) && !IsNamedFind(node))
+            {
+                AppendConcatNodes(node.Left, sequence);
+                AppendConcatNodes(node.Right, sequence);
+            } else {
+                sequence.Add(node);
+            }
+        }
+
+        private static void GenerateConcatTail(
+                            IReadOnlyList<RegexAstNode> sequence,
+                            int start,
+                            in SequenceEmitter<string> sc,
+                            in List<SequenceEmitter<string>> func_list,
+                            in SourceGenContext context,
+                            in ExitLabel exit_label
+        )
+        {
+            for (int i = start; i < sequence.Count; i++)
+            {
+                RegexAstNode node = sequence[i];
+                if (node.Label == RegexElementLabel.COUNT)
+                {
+                    // COUNT owns both its repetition and the continuation that may retry it.
+                    GenerateCount(node, sc, func_list, context, exit_label, sequence, i + 1);
+                    return;
+                }
+                GenerateMethodSource(node, sc, func_list, context, exit_label);
+            }
+        }
+
+        #endregion
+
        #region FIND concatenation

        private static bool TryGenerateFindConcat(