mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <liblangutil/SourceReferenceExtractor.h>
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#include <liblangutil/CharStream.h>
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#include <liblangutil/Exceptions.h>
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#include <cmath>
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#include <iomanip>
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using namespace std;
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using namespace dev;
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using namespace langutil;
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SourceReferenceExtractor::Message SourceReferenceExtractor::extract(Exception const& _exception, string _category)
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{
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SourceLocation const* location = boost::get_error_info<errinfo_sourceLocation>(_exception);
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string const* message = boost::get_error_info<errinfo_comment>(_exception);
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SourceReference primary = extract(location, message ? *message : "");
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std::vector<SourceReference> secondary;
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auto secondaryLocation = boost::get_error_info<errinfo_secondarySourceLocation>(_exception);
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if (secondaryLocation && !secondaryLocation->infos.empty())
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for (auto const& info: secondaryLocation->infos)
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secondary.emplace_back(extract(&info.second, info.first));
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return Message{std::move(primary), _category, std::move(secondary)};
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}
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SourceReference SourceReferenceExtractor::extract(SourceLocation const* _location, std::string message)
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{
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if (!_location || !_location->source.get()) // Nothing we can extract here
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return SourceReference::MessageOnly(std::move(message));
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shared_ptr<CharStream> const& source = _location->source;
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LineColumn const interest = source->translatePositionToLineColumn(_location->start);
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LineColumn start = interest;
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LineColumn end = source->translatePositionToLineColumn(_location->end);
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bool const isMultiline = start.line != end.line;
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string line = source->lineAtPosition(_location->start);
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int locationLength = isMultiline ? line.length() - start.column : end.column - start.column;
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if (locationLength > 150)
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{
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int const lhs = start.column + 35;
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int const rhs = (isMultiline ? line.length() : end.column) - 35;
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line = line.substr(0, lhs) + " ... " + line.substr(rhs);
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end.column = start.column + 75;
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locationLength = 75;
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}
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if (line.length() > 150)
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{
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int const len = line.length();
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line = line.substr(max(0, start.column - 35), min(start.column, 35) + min(locationLength + 35, len - start.column));
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if (start.column + locationLength + 35 < len)
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line += " ...";
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if (start.column > 35)
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{
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line = " ... " + line;
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start.column = 40;
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}
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end.column = start.column + locationLength;
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}
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return SourceReference{
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std::move(message),
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source->name(),
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interest,
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isMultiline,
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line,
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start.column,
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end.column,
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};
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}
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