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

trunk/src/tools/gn/location.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_LOCATION_H_
-#define TOOLS_GN_LOCATION_H_
-
-#include <algorithm>
-
-#include "base/logging.h"
-
-class InputFile;
-
-// Represents a place in a source file. Used for error reporting.
-class Location {
- public:
-  Location()
-      : file_(NULL),
-        line_number_(-1),
-        char_offset_(-1) {
-  }
-  Location(const InputFile* file, int line_number, int char_offset)
-      : file_(file),
-        line_number_(line_number),
-        char_offset_(char_offset) {
-  }
-
-  const InputFile* file() const { return file_; }
-  int line_number() const { return line_number_; }
-  int char_offset() const { return char_offset_; }
-
-  bool operator==(const Location& other) const {
-    return other.file_ == file_ &&
-           other.line_number_ == line_number_ &&
-           other.char_offset_ == char_offset_;
-  }
-
-  bool operator<(const Location& other) const {
-    DCHECK(file_ == other.file_);
-    if (line_number_ != other.line_number_)
-      return line_number_ < other.line_number_;
-    return char_offset_ < other.char_offset_;
-  }
-
- private:
-  const InputFile* file_;  // Null when unset.
-  int line_number_;  // -1 when unset.
-  int char_offset_;  // -1 when unset.
-};
-
-// Represents a range in a source file. Used for error reporting.
-// The end is exclusive i.e. [begin, end)
-class LocationRange {
- public:
-  LocationRange() {}
-  LocationRange(const Location& begin, const Location& end)
-      : begin_(begin),
-        end_(end) {
-    DCHECK(begin_.file() == end_.file());
-  }
-
-  const Location& begin() const { return begin_; }
-  const Location& end() const { return end_; }
-
-  LocationRange Union(const LocationRange& other) const {
-    DCHECK(begin_.file() == other.begin_.file());
-    return LocationRange(
-        begin_ < other.begin_ ? begin_ : other.begin_,
-        end_ < other.end_ ? other.end_ : end_);
-  }
-
- private:
-  Location begin_;
-  Location end_;
-};
-
-#endif  // TOOLS_GN_LOCATION_H_