Clean debug tree

src/parser.cpp

@@ -14,20 +14,28 @@ void _debug_print_tree(const Node& node, int depth, const string& prefix = "") {
 
         cout << prefix << _node_names[int(innerNode.type)] << "\n";
 
+        string new_prefix = prefix;
+        size_t pos = new_prefix.find("└──");
+        while (pos != std::string::npos) {
+            new_prefix.replace(pos, 9, "   ");
+            pos = new_prefix.find("└──", pos + 4);
+        }
+
+        pos = new_prefix.find("├──");
+        while (pos != std::string::npos) {
+            new_prefix.replace(pos, 9, "│   ");
+            pos = new_prefix.find("├──", pos + 6);
+        }
+
         for (size_t i = 0; i < innerNode.children.size(); ++i) {
             string childPrefix = (i == innerNode.children.size() - 1) ? "└── " : "├── ";
-            _debug_print_tree(innerNode.children[i], depth + 1, prefix + childPrefix);
+            _debug_print_tree(innerNode.children[i], depth + 1, new_prefix + childPrefix);
         }
     } else {
         const Token& token = get<Token>(node);
         cout << prefix;
         _debug_print_token(token);
-        if (holds_alternative<int>(token.data)) {
+        cout << endl;
-            cout << ", Value: " << get<int>(token.data);
-        } else if (holds_alternative<string>(token.data)) {
-            cout << ", Value: " << get<string>(token.data);
-        }
-        cout << "\n";
     }
 }