Method describe

src/simulate/debug_info.cpp:714–723

    LineInfo LineInfo::g_LineInfoNULL;

    string LineInfo::describe(bool fully) const {
        if ( fileInfo ) {
            TextWriter ss;
            ss << fileInfo->name << ":" << line << ":" << column;
            if ( fully ) ss << "-" << last_line << ":" << last_column;
            return ss.str();
        } else {
            return string();
        }
    }

    bool LineInfo::operator < ( const LineInfo & info ) const {
        if ( fileInfo && info.fileInfo && fileInfo->name != info.fileInfo->name)