Revert 214254 "Add initial prototype for the GN meta-buildsystem."

trunk/src/tools/gn/value_extractors.h

-// 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.
-
-#ifndef TOOLS_GN_VALUE_EXTRACTORS_H_
-#define TOOLS_GN_VALUE_EXTRACTORS_H_
-
-#include <string>
-#include <vector>
-
-#include "tools/gn/value.h"
-
-class Err;
-class Label;
-class SourceDir;
-class SourceFile;
-
-// Sets the error and returns false on failure.
-template<typename T, class Converter>
-bool ListValueExtractor(const Value& value, std::vector<T>* dest,
-                        Err* err,
-                        const Converter& converter) {
-  if (!value.VerifyTypeIs(Value::LIST, err))
-    return false;
-  const std::vector<Value>& input_list = value.list_value();
-  dest->resize(input_list.size());
-  for (size_t i = 0; i < input_list.size(); i++) {
-    if (!converter(input_list[i], &(*dest)[i], err))
-      return false;
-  }
-  return true;
-}
-
-// On failure, returns false and sets the error.
-bool ExtractListOfStringValues(const Value& value,
-                               std::vector<std::string>* dest,
-                               Err* err);
-
-// Looks for a list of source files relative to a given current dir.
-bool ExtractListOfRelativeFiles(const Value& value,
-                                const SourceDir& current_dir,
-                                std::vector<SourceFile>* files,
-                                Err* err);
-
-// Looks for a list of source directories relative to a given current dir.
-bool ExtractListOfRelativeDirs(const Value& value,
-                               const SourceDir& current_dir,
-                               std::vector<SourceDir>* dest,
-                               Err* err);
-
-bool ExtractListOfLabels(const Value& value,
-                         const SourceDir& current_dir,
-                         const Label& current_toolchain,
-                         std::vector<Label>* dest,
-                         Err* err);
-
-#endif  // TOOLS_GN_VALUE_EXTRACTORS_H_