path: root/libdevcore/Exceptions.cpp

/*
    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/>.
*/

#include <libdevcore/Exceptions.h>

#include <boost/lexical_cast.hpp>

using namespace std;
using namespace dev;

char const* Exception::what() const noexcept
{
    // Return the comment if available.
    if (string const* cmt = comment())
        return cmt->data();
    
    // Fallback to base what().
    // Boost accepts nullptr, but the C++ standard doesn't
    // and crashes on some platforms.
    return std::exception::what();
}

string Exception::lineInfo() const
{
    char const* const* file = boost::get_error_info<boost::throw_file>(*this);
    int const* line = boost::get_error_info<boost::throw_line>(*this);
    string ret;
    if (file)
        ret += *file;
    ret += ':';
    if (line)
        ret += boost::lexical_cast<string>(*line);
    return ret;
}

string const* Exception::comment() const noexcept
{
    return boost::get_error_info<errinfo_comment>(*this);
}