More features handled in kernel impact.

pkg/compiler/lib/src/kernel/kernel_debug.dart

+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// Helper for debug Kernel nodes.
+
+library kernel.debug;
+
+import 'package:kernel/kernel.dart';
+import 'package:kernel/visitor.dart';
+
+import '../util/util.dart' show Indentation, Tagging;
+
+class DebugPrinter extends Visitor with Indentation, Tagging<Node> {
+  StringBuffer sb = new StringBuffer();
+
+  void visitNodeWithChildren(Node node, String type, [Map params]) {
+    openNode(node, type, params);
+    node.visitChildren(this);
+    closeNode();
+  }
+
+  @override
+  void defaultNode(Node node) {
+    visitNodeWithChildren(node, '${node.runtimeType}');
+  }
+
+  @override
+  void visitName(Name node) {
+    openAndCloseNode(node, '${node.runtimeType}',
+        {'name': node.name, 'library': node.library?.name});
+  }
+
+  @override
+  void visitIntLiteral(IntLiteral node) {
+    openAndCloseNode(node, '${node.runtimeType}', {'value': '${node.value}'});
+  }
+
+  /// Pretty-prints given node tree into string.
+  static String prettyPrint(Node node) {
+    var p = new DebugPrinter();
+    node.accept(p);
+    return p.sb.toString();
+  }
+}