initial commit

pcomp/treetypes.pas

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+(* Copyright 2021-2024 Sebastian Lederer. See the file LICENSE.md for details *)
+{
+type TreedataType = (TDString, TDInteger);
+
+type Treedata = record
+        case typ:Treedatatype of 
+        TDString:(stringdata:string);
+        TDInteger:(intdata:integer);
+    end;
+}
+type StringRef = ^string;
+
+type TreeNode = record
+        parent: ^TreeNode;
+        left,right: ^TreeNode;
+        height: integer;
+	key: StringRef;
+	data: ^Treedata;
+    end;
+
+type TreeRef = ^TreeNode;
+     TreeDataRef = ^Treedata;
+
+type TreeWalkState = record
+		currentNode:TreeRef;
+	end;