78 lines
2.0 KiB
C++
78 lines
2.0 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef TOOLS_GN_LOCATION_H_
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#define TOOLS_GN_LOCATION_H_
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#include <algorithm>
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#include "base/logging.h"
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class InputFile;
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// Represents a place in a source file. Used for error reporting.
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class Location {
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public:
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Location()
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: file_(NULL),
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line_number_(-1),
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char_offset_(-1) {
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}
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Location(const InputFile* file, int line_number, int char_offset)
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: file_(file),
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line_number_(line_number),
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char_offset_(char_offset) {
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}
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const InputFile* file() const { return file_; }
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int line_number() const { return line_number_; }
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int char_offset() const { return char_offset_; }
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bool operator==(const Location& other) const {
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return other.file_ == file_ &&
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other.line_number_ == line_number_ &&
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other.char_offset_ == char_offset_;
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}
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bool operator<(const Location& other) const {
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DCHECK(file_ == other.file_);
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if (line_number_ != other.line_number_)
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return line_number_ < other.line_number_;
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return char_offset_ < other.char_offset_;
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}
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private:
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const InputFile* file_; // Null when unset.
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int line_number_; // -1 when unset.
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int char_offset_; // -1 when unset.
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};
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// Represents a range in a source file. Used for error reporting.
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// The end is exclusive i.e. [begin, end)
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class LocationRange {
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public:
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LocationRange() {}
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LocationRange(const Location& begin, const Location& end)
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: begin_(begin),
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end_(end) {
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DCHECK(begin_.file() == end_.file());
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}
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const Location& begin() const { return begin_; }
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const Location& end() const { return end_; }
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LocationRange Union(const LocationRange& other) const {
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DCHECK(begin_.file() == other.begin_.file());
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return LocationRange(
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begin_ < other.begin_ ? begin_ : other.begin_,
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end_ < other.end_ ? other.end_ : end_);
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}
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private:
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Location begin_;
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Location end_;
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};
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#endif // TOOLS_GN_LOCATION_H_
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