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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 <liblangutil/SourceReferenceFormatter.h>
#include <liblangutil/Scanner.h>
#include <liblangutil/Exceptions.h>
using namespace std;
using namespace dev;
using namespace langutil;
void SourceReferenceFormatter::printSourceLocation(SourceLocation const* _location)
{
if (!_location || !_location->source)
return; // Nothing we can print here
auto const& scanner = m_scannerFromSourceName(_location->source->name());
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 + 35) + " ... " + line.substr(endColumn - 35);
endColumn = startColumn + 75;
locationLength = 75;
}
if (line.length() > 150)
{
int len = line.length();
line = line.substr(max(0, startColumn - 35), min(startColumn, 35) + min(locationLength + 35, len - startColumn));
if (startColumn + locationLength + 35 < len)
line += " ...";
if (startColumn > 35)
{
line = " ... " + line;
startColumn = 40;
}
endColumn = startColumn + locationLength;
}
m_stream << line << endl;
for_each(
line.cbegin(),
line.cbegin() + startColumn,
[this](char const& ch) { m_stream << (ch == '\t' ? '\t' : ' '); }
);
m_stream << "^";
if (endColumn > startColumn + 2)
m_stream << string(endColumn - startColumn - 2, '-');
if (endColumn > startColumn + 1)
m_stream << "^";
m_stream << endl;
}
else
m_stream <<
scanner.lineAtPosition(_location->start) <<
endl <<
string(startColumn, ' ') <<
"^ (Relevant source part starts here and spans across multiple lines)." <<
endl;
}
void SourceReferenceFormatter::printSourceName(SourceLocation const* _location)
{
if (!_location || !_location->source)
return; // Nothing we can print here
auto const& scanner = m_scannerFromSourceName(_location->source->name());
int startLine;
int startColumn;
tie(startLine, startColumn) = scanner.translatePositionToLineColumn(_location->start);
m_stream << _location->source->name() << ":" << (startLine + 1) << ":" << (startColumn + 1) << ": ";
}
void SourceReferenceFormatter::printExceptionInformation(
dev::Exception const& _exception,
string const& _name
)
{
SourceLocation const* location = boost::get_error_info<errinfo_sourceLocation>(_exception);
auto secondarylocation = boost::get_error_info<errinfo_secondarySourceLocation>(_exception);
printSourceName(location);
m_stream << _name;
if (string const* description = boost::get_error_info<errinfo_comment>(_exception))
m_stream << ": " << *description << endl;
else
m_stream << endl;
printSourceLocation(location);
if (secondarylocation && !secondarylocation->infos.empty())
{
for (auto info: secondarylocation->infos)
{
printSourceName(&info.second);
m_stream << info.first << endl;
printSourceLocation(&info.second);
}
m_stream << endl;
}
}
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