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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Lefteris Karapetsas <lefteris@ethdev.com>
* @date 2015
* Represents a location in a source file
*/
#pragma once
#include <memory>
#include <string>
#include <ostream>
#include <tuple>
namespace dev
{
/**
* Representation of an interval of source positions.
* The interval includes start and excludes end.
*/
struct SourceLocation
{
SourceLocation(int _start, int _end, std::shared_ptr<std::string const> _sourceName):
start(_start), end(_end), sourceName(_sourceName) { }
SourceLocation(): start(-1), end(-1) { }
SourceLocation(SourceLocation const& _other):
start(_other.start), end(_other.end), sourceName(_other.sourceName) {}
SourceLocation& operator=(SourceLocation const& _other) { start = _other.start; end = _other.end; sourceName = _other.sourceName; return *this;}
bool operator==(SourceLocation const& _other) const { return start == _other.start && end == _other.end;}
bool operator!=(SourceLocation const& _other) const { return !operator==(_other); }
inline bool operator<(SourceLocation const& _other) const;
inline bool contains(SourceLocation const& _other) const;
inline bool intersects(SourceLocation const& _other) const;
bool isEmpty() const { return start == -1 && end == -1; }
int start;
int end;
std::shared_ptr<std::string const> sourceName;
};
/// Stream output for Location (used e.g. in boost exceptions).
inline std::ostream& operator<<(std::ostream& _out, SourceLocation const& _location)
{
if (_location.isEmpty())
return _out << "NO_LOCATION_SPECIFIED";
return _out << *_location.sourceName << "[" << _location.start << "," << _location.end << ")";
}
bool SourceLocation::operator<(SourceLocation const& _other) const
{
if (!sourceName || !_other.sourceName)
return int(!!sourceName) < int(!!_other.sourceName);
return make_tuple(*sourceName, start, end) < make_tuple(*_other.sourceName, _other.start, _other.end);
}
bool SourceLocation::contains(SourceLocation const& _other) const
{
if (isEmpty() || _other.isEmpty() || !sourceName || !_other.sourceName || *sourceName != *_other.sourceName)
return false;
return start <= _other.start && _other.end <= end;
}
bool SourceLocation::intersects(SourceLocation const& _other) const
{
if (isEmpty() || _other.isEmpty() || !sourceName || !_other.sourceName || *sourceName != *_other.sourceName)
return false;
return _other.start < end && start < _other.end;
}
}
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