gn: handle continued suffix comments

tools/gn/parse_tree.cc

 // Copyright (c) 2013 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.
 
 #include "tools/gn/parse_tree.h"
 
 #include <string>
 
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "tools/gn/functions.h"
 #include "tools/gn/operators.h"
 #include "tools/gn/scope.h"
 #include "tools/gn/string_utils.h"
 
 namespace {
 
 std::string IndentFor(int value) {
   return std::string(value, ' ');
 }
 
 }  // namespace
 
 Comments::Comments() {
 }
 
 Comments::~Comments() {
 }
 
+void Comments::ReverseSuffix() {
+  for (int i = 0, j = static_cast<int>(suffix_.size() - 1); i < j; ++i, --j)
+    std::swap(suffix_[i], suffix_[j]);
+}
+
 ParseNode::ParseNode() {
 }
 
 ParseNode::~ParseNode() {
 }
 
 const AccessorNode* ParseNode::AsAccessor() const { return NULL; }
 const BinaryOpNode* ParseNode::AsBinaryOp() const { return NULL; }
 const BlockNode* ParseNode::AsBlock() const { return NULL; }
 const ConditionNode* ParseNode::AsConditionNode() const { return NULL; }
@@ skipping 525 matching lines @@
 Err UnaryOpNode::MakeErrorDescribing(const std::string& msg,
                                      const std::string& help) const {
   return Err(op_, msg, help);
 }
 
 void UnaryOpNode::Print(std::ostream& out, int indent) const {
   out << IndentFor(indent) << "UNARY(" << op_.value() << ")\n";
   PrintComments(out, indent);
   operand_->Print(out, indent + 1);
 }