gn format: penalty-based line breaking WIP XXX

tools/gn/parse_tree.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TOOLS_GN_PARSE_TREE_H_
 #define TOOLS_GN_PARSE_TREE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 209 matching lines @@
 
   const BlockNode* AsBlock() const override;
   Value Execute(Scope* scope, Err* err) const override;
   LocationRange GetRange() const override;
   Err MakeErrorDescribing(
       const std::string& msg,
       const std::string& help = std::string()) const override;
   void Print(std::ostream& out, int indent) const override;
 
   void set_begin_token(const Token& t) { begin_token_ = t; }
+  const Token& begin_token() const { return begin_token_; }
   void set_end(scoped_ptr<EndNode> e) { end_ = e.Pass(); }
   const EndNode* End() const { return end_.get(); }
 
   const std::vector<ParseNode*>& statements() const { return statements_; }
   void append_statement(scoped_ptr<ParseNode> s) {
     statements_.push_back(s.release());
   }
 
   // Doesn't create a nested scope.
   Value ExecuteBlockInScope(Scope* our_scope, Err* err) const;
@@ skipping 123 matching lines @@
 
   const ListNode* AsList() const override;
   Value Execute(Scope* scope, Err* err) const override;
   LocationRange GetRange() const override;
   Err MakeErrorDescribing(
       const std::string& msg,
       const std::string& help = std::string()) const override;
   void Print(std::ostream& out, int indent) const override;
 
   void set_begin_token(const Token& t) { begin_token_ = t; }
+  const Token& begin_token() const { return begin_token_; }
   void set_end(scoped_ptr<EndNode> e) { end_ = e.Pass(); }
   const EndNode* End() const { return end_.get(); }
 
   void append_item(scoped_ptr<ParseNode> s) {
     contents_.push_back(s.release());
   }
   const std::vector<const ParseNode*>& contents() const { return contents_; }
 
  private:
   // Tokens corresponding to the [ and ]. The end token is stored in inside an
@@ skipping 113 matching lines @@
   const Token& value() const { return value_; }
   void set_value(const Token& t) { value_ = t; }
 
  private:
   Token value_;
 
   DISALLOW_COPY_AND_ASSIGN(EndNode);
 };
 
 #endif  // TOOLS_GN_PARSE_TREE_H_