Nicer AST formatting.

runtime/vm/ast_printer.cc

 // Copyright (c) 2011, 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.
 
 #include "vm/ast_printer.h"
 
 #include "vm/handles.h"
 #include "vm/log.h"
 #include "vm/object.h"
 #include "vm/os.h"
 #include "vm/parser.h"
 
 namespace dart {
 
-AstPrinter::AstPrinter() { }
+AstPrinter::AstPrinter() : indent_(0) { }
 
 
 AstPrinter::~AstPrinter() { }
 
 
 void AstPrinter::VisitGenericAstNode(AstNode* node) {
   ISL_Print("(%s ", node->PrettyName());
   node->VisitChildren(this);
   ISL_Print(")");
 }
 
 
 void AstPrinter::VisitSequenceNode(SequenceNode* node) {
+  indent_++;
   ISL_Print("(%s (scope \"%p\")", node->PrettyName(), node->scope());
   for (int i = 0; i < node->length(); ++i) {
     ISL_Print("\n");
+    for (intptr_t i = 0; i < indent_; i++) {
+      ISL_Print("  ");
+    }
     node->NodeAt(i)->Visit(this);
   }
   ISL_Print(")");
+  indent_--;
 }
 
 
 void AstPrinter::VisitCloneContextNode(CloneContextNode* node) {
   VisitGenericAstNode(node);
 }
 
 
 void AstPrinter::VisitArgumentListNode(ArgumentListNode* arguments) {
   VisitGenericAstNode(arguments);
@@ skipping 497 matching lines @@
   ASSERT(node_sequence != NULL);
   AstPrinter ast_printer;
   const char* function_name =
       parsed_function.function().ToFullyQualifiedCString();
   ISL_Print("Ast for function '%s' {\n", function_name);
   node_sequence->Visit(&ast_printer);
   ISL_Print("}\n");
 }
 
 }  // namespace dart