regex ir opt code rewrite gen2, window scanning

StgSharp.RegularAnalysis/Text/RegexIR.cs

@@ -47,6 +47,8 @@ namespace StgSharp.RegularAnalysis.Text
         Pop = 1 << 7,
         Pack = 1 << 8,
         Find_Seq = 1 << 9,
+        Find_Set = 1 << 10,
+        Find_Complex = 1 << 11,
 
         Match = Match_Seq | Match_Set,
         Count = Count_Seq | Count_Set | Count_Complex,
@@ -68,6 +70,27 @@ namespace StgSharp.RegularAnalysis.Text
 
     }
 
+    internal sealed class RegexFindComplexIR(
+                          bool nearest,
+                          int count
+    ) : RegexIR
+    {
+
+        internal override RegexIRCommand Command => RegexIRCommand.Find_Complex;
+
+        private bool IsNearest { get; } = nearest;
+
+        private int CommandCount { get; } = count;
+
+        internal override string AsCommand(
+                                 int lineNum
+        )
+        {
+            return $"[{lineNum}]\t FIND_COMPLEX {(IsNearest ? "NEAREST" : "FURTHEST")} COUNT: {CommandCount}";
+        }
+
+    }
+
     internal abstract class RegexIR
     {