| // 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 <string> |
| |
| class InputFile; |
| |
| // Represents a place in a source file. Used for error reporting. |
| class Location { |
| public: |
| Location(); |
| Location(const InputFile* file, int line_number, int column_number); |
| |
| const InputFile* file() const { return file_; } |
| int line_number() const { return line_number_; } |
| int column_number() const { return column_number_; } |
| bool is_null() const { return *this == Location(); } |
| |
| bool operator==(const Location& other) const; |
| bool operator!=(const Location& other) const; |
| bool operator<(const Location& other) const; |
| bool operator<=(const Location& other) const; |
| bool operator>(const Location& other) const { return !(*this <= other); } |
| bool operator>=(const Location& other) const { return !(*this < other); } |
| |
| // Returns a string with the file, line, and (optionally) the character |
| // offset for this location. If this location is null, returns an empty |
| // string. |
| std::string Describe(bool include_column_number) const; |
| |
| private: |
| const InputFile* file_ = nullptr; // Null when unset. |
| int line_number_ = -1; // -1 when unset. 1-based. |
| int column_number_ = -1; // -1 when unset. 1-based. |
| }; |
| |
| // 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); |
| |
| const Location& begin() const { return begin_; } |
| const Location& end() const { return end_; } |
| bool is_null() const { |
| return begin_.is_null(); // No need to check both for the null case. |
| } |
| |
| LocationRange Union(const LocationRange& other) const; |
| |
| private: |
| Location begin_; |
| Location end_; |
| }; |
| |
| #endif // TOOLS_GN_LOCATION_H_ |