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, int byte); 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_; } byte()21 int byte() const { return byte_; } 22 23 bool operator==(const Location& other) const; 24 bool operator!=(const Location& other) const; 25 bool operator<(const Location& other) const; 26 27 // Returns a string with the file, line, and (optionally) the character 28 // offset for this location. If this location is null, returns an empty 29 // string. 30 std::string Describe(bool include_char_offset) const; 31 32 private: 33 const InputFile* file_; // Null when unset. 34 int line_number_; // -1 when unset. 1-based. 35 int char_offset_; // -1 when unset. 1-based. 36 int byte_; // Index into the buffer, 0-based. 37 }; 38 39 // Represents a range in a source file. Used for error reporting. 40 // The end is exclusive i.e. [begin, end) 41 class LocationRange { 42 public: 43 LocationRange(); 44 LocationRange(const Location& begin, const Location& end); 45 begin()46 const Location& begin() const { return begin_; } end()47 const Location& end() const { return end_; } 48 49 LocationRange Union(const LocationRange& other) const; 50 51 private: 52 Location begin_; 53 Location end_; 54 }; 55 56 #endif // TOOLS_GN_LOCATION_H_ 57