In file included from ../../app/qcheapruler.hpp:8,
                 from ../../app/main.cpp:11:
../../include/mapbox/cheap_ruler.hpp: In member function ‘mapbox::cheap_ruler::line_string mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)’:
../../include/mapbox/cheap_ruler.hpp:202:79: error: the type ‘const mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)::<lambda(auto:3)>’ of ‘constexpr’ variable ‘getPoint’ is not literal
         constexpr auto getPoint = [](auto tuple) { return std::get<0>(tuple); };
                                                                               ^
../../include/mapbox/cheap_ruler.hpp:202:36: note: ‘mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)::<lambda(auto:3)>’ is not literal because:
         constexpr auto getPoint = [](auto tuple) { return std::get<0>(tuple); };
                                    ^
cc1plus: note:   ‘mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)::<lambda(auto:3)>’ is a closure type, which is only literal in C++17 and later
../../include/mapbox/cheap_ruler.hpp:203:79: error: the type ‘const mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)::<lambda(auto:4)>’ of ‘constexpr’ variable ‘getIndex’ is not literal
         constexpr auto getIndex = [](auto tuple) { return std::get<1>(tuple); };
                                                                               ^
../../include/mapbox/cheap_ruler.hpp:203:36: note: ‘mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)::<lambda(auto:4)>’ is not literal because:
         constexpr auto getIndex = [](auto tuple) { return std::get<1>(tuple); };
                                    ^
cc1plus: note:   ‘mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)::<lambda(auto:4)>’ is a closure type, which is only literal in C++17 and later
../../include/mapbox/cheap_ruler.hpp:204:79: error: the type ‘const mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)::<lambda(auto:5)>’ of ‘constexpr’ variable ‘getT’ is not literal
         constexpr auto getT     = [](auto tuple) { return std::get<2>(tuple); };
                                                                               ^
../../include/mapbox/cheap_ruler.hpp:204:36: note: ‘mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)::<lambda(auto:5)>’ is not literal because:
         constexpr auto getT     = [](auto tuple) { return std::get<2>(tuple); };
                                    ^
cc1plus: note:   ‘mapbox::cheap_ruler::CheapRuler::lineSlice(mapbox::cheap_ruler::point, mapbox::cheap_ruler::point, const line_string&)::<lambda(auto:5)>’ is a closure type, which is only literal in C++17 and later
../../app/main.cpp: In lambda function: