1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef TOOLS_GN_LOCATION_H_ 6 #define TOOLS_GN_LOCATION_H_ 7 8 #include <string> 9 10 class InputFile; 11 12 // Represents a place in a source file. Used for error reporting. 13 class Location { 14 public: 15 Location(); 16 Location(const InputFile* file, int line_number, int char_offset); 17 file()18 const InputFile* file() const { return file_; } line_number()19 int line_number() const { return line_number_; } char_offset()20 int char_offset() const { return char_offset_; } 21 22 bool operator==(const Location& other) const; 23 bool operator!=(const Location& other) const; 24 bool operator<(const Location& other) const; 25 26 // Returns a string with the file, line, and (optionally) the character 27 // offset for this location. If this location is null, returns an empty 28 // string. 29 std::string Describe(bool include_char_offset) const; 30 31 private: 32 const InputFile* file_; // Null when unset. 33 int line_number_; // -1 when unset. 34 int char_offset_; // -1 when unset. 35 }; 36 37 // Represents a range in a source file. Used for error reporting. 38 // The end is exclusive i.e. [begin, end) 39 class LocationRange { 40 public: 41 LocationRange(); 42 LocationRange(const Location& begin, const Location& end); 43 begin()44 const Location& begin() const { return begin_; } end()45 const Location& end() const { return end_; } 46 47 LocationRange Union(const LocationRange& other) const; 48 49 private: 50 Location begin_; 51 Location end_; 52 }; 53 54 #endif // TOOLS_GN_LOCATION_H_ 55