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/*
This file is part of solidity.
solidity 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.
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2014
* Formatting functions for errors referencing positions and locations in the source.
*/
#include <libsolidity/interface/SourceReferenceFormatter.h>
#include <libsolidity/parsing/Scanner.h>
#include <libsolidity/interface/Exceptions.h>
using namespace std;
namespace dev
{
namespace solidity
{
void SourceReferenceFormatter::printSourceLocation(
ostream& _stream,
SourceLocation const* _location,
function<Scanner const&(string const&)> const& _scannerFromSourceName
)
{
if (!_location || !_location->sourceName)
return; // Nothing we can print here
auto const& scanner = _scannerFromSourceName(*_location->sourceName);
int startLine;
int startColumn;
tie(startLine, startColumn) = scanner.translatePositionToLineColumn(_location->start);
int endLine;
int endColumn;
tie(endLine, endColumn) = scanner.translatePositionToLineColumn(_location->end);
if (startLine == endLine)
{
string line = scanner.lineAtPosition(_location->start);
int locationLength = endColumn - startColumn;
if (locationLength > 150)
{
line = line.substr(0, startColumn + 75) + " ... " + line.substr(endColumn);
endColumn = startColumn + 80;
locationLength = 80;
}
if (line.length() > 150)
{
line = " ... " + line.substr(startColumn, locationLength) + " ... ";
startColumn = 5;
endColumn = startColumn + locationLength;
}
_stream << line << endl;
for_each(
line.cbegin(),
line.cbegin() + startColumn,
[&_stream](char const& ch) { _stream << (ch == '\t' ? '\t' : ' '); }
);
_stream << "^";
if (endColumn > startColumn + 2)
_stream << string(endColumn - startColumn - 2, '-');
if (endColumn > startColumn + 1)
_stream << "^";
_stream << endl;
}
else
_stream <<
scanner.lineAtPosition(_location->start) <<
endl <<
string(startColumn, ' ') <<
"^\n" <<
"Spanning multiple lines.\n";
}
void SourceReferenceFormatter::printSourceName(
ostream& _stream,
SourceLocation const* _location,
function<Scanner const&(string const&)> const& _scannerFromSourceName
)
{
if (!_location || !_location->sourceName)
return; // Nothing we can print here
auto const& scanner = _scannerFromSourceName(*_location->sourceName);
int startLine;
int startColumn;
tie(startLine, startColumn) = scanner.translatePositionToLineColumn(_location->start);
_stream << *_location->sourceName << ":" << (startLine + 1) << ":" << (startColumn + 1) << ": ";
}
void SourceReferenceFormatter::printExceptionInformation(
ostream& _stream,
Exception const& _exception,
string const& _name,
function<Scanner const&(string const&)> const& _scannerFromSourceName
)
{
SourceLocation const* location = boost::get_error_info<errinfo_sourceLocation>(_exception);
auto secondarylocation = boost::get_error_info<errinfo_secondarySourceLocation>(_exception);
printSourceName(_stream, location, _scannerFromSourceName);
_stream << _name;
if (string const* description = boost::get_error_info<errinfo_comment>(_exception))
_stream << ": " << *description << endl;
else
_stream << endl;
printSourceLocation(_stream, location, _scannerFromSourceName);
if (secondarylocation && !secondarylocation->infos.empty())
{
for (auto info: secondarylocation->infos)
{
printSourceName(_stream, &info.second, _scannerFromSourceName);
_stream << info.first << endl;
printSourceLocation(_stream, &info.second, _scannerFromSourceName);
}
_stream << endl;
}
}
}
}
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