* installing *source* package ‘Waypoint’ ...
** this is package ‘Waypoint’ version ‘1.3.1’
** package ‘Waypoint’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
using C++ compiler: ‘Apple clang version 14.0.3 (clang-1403.0.22.14.1)’
using SDK: ‘MacOSX11.3.1.sdk’
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I/opt/R/x86_64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c CoordBase.cpp -o CoordBase.o
clang++ -arch x86_64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG  -I'/Volumes/Builds/packages/big-sur-x86_64/Rlib/4.6/Rcpp/include' -I/opt/R/x86_64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c RcppExports.cpp -o RcppExports.o
In file included from CoordBase.cpp:25:
./CoordBase.h:103:21: error: expected concept name with optional arguments
                { t.length() } -> std::integral;
                                  ^
./CoordBase.h:105:20: error: expected concept name with optional arguments
                { t.nrows() } -> std::integral;
                                 ^
2 errors generated.
make: *** [CoordBase.o] Error 1
make: *** Waiting for unfinished jobs....
ERROR: compilation failed for package ‘Waypoint’
* removing ‘/Volumes/Builds/packages/big-sur-x86_64/results/4.6/Waypoint.Rcheck/Waypoint’