Function parseFirstNum

source/MRMesh/MRIOParsing.cpp:311–331

}

Expected<void> parseFirstNum( const std::string_view& str, int& num )
{
    using namespace boost::spirit::x3;

    auto n = [&] ( auto& ctx )
    {
        num = _attr( ctx );
    };
    bool r = phrase_parse(
        str.begin(),
        str.end(),
        int_[n],
        ascii::space );

    if ( !r )
    {
        return unexpected( "Failed to parse face in OFF-file" );
    }

    return {};
}

Expected<void> parsePolygon( const std::string_view& str, VertId* vertId, int* numPoints)
{