* installing *source* package ‘vrpr’ ...
** this is package ‘vrpr’ version ‘0.1.0’
** package ‘vrpr’ 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 C++20
using SDK: ‘MacOSX11.3.1.sdk’
clang++ -arch arm64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -Ivendor/pyvrp -DNDEBUG -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.5/cpp11/include' -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c cpp11.cpp -o cpp11.o
clang++ -arch arm64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -Ivendor/pyvrp -DNDEBUG -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.5/cpp11/include' -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c local_search.cpp -o local_search.o
clang++ -arch arm64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -Ivendor/pyvrp -DNDEBUG -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.5/cpp11/include' -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c problem_data.cpp -o problem_data.o
clang++ -arch arm64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -Ivendor/pyvrp -DNDEBUG -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.5/cpp11/include' -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c sanity.cpp -o sanity.o
clang++ -arch arm64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -Ivendor/pyvrp -DNDEBUG -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.5/cpp11/include' -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c solution.cpp -o solution.o
clang++ -arch arm64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -Ivendor/pyvrp -DNDEBUG -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.5/cpp11/include' -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c vendor/pyvrp/ProblemData.cpp -o vendor/pyvrp/ProblemData.o
In file included from local_search.cpp:13:
./vendor/pyvrp/CostEvaluator.h:23:29: error: expected concept name with optional arguments
    { arg.excessLoad() } -> std::convertible_to<std::vector<Load>>;
                            ^
In file included from solution.cpp:9:
./vendor/pyvrp/CostEvaluator.h:23:29: error: expected concept name with optional arguments
    { arg.excessLoad() } -> std::convertible_to<std::vector<Load>>;
                            ^
./vendor/pyvrp/CostEvaluator.h:43:27: error: expected concept name with optional arguments
    { arg.distance() } -> std::convertible_to<std::pair<Cost, Distance>>;
                          ^
./vendor/pyvrp/CostEvaluator.h:44:27: error: expected concept name with optional arguments
    { arg.duration() } -> std::convertible_to<std::pair<Cost, Duration>>;
                          ^
./vendor/pyvrp/CostEvaluator.h:43:27: error: expected concept name with optional arguments
    { arg.distance() } -> std::convertible_to<std::pair<Cost, Distance>>;
                          ^
./vendor/pyvrp/CostEvaluator.h:44:27: error: expected concept name with optional arguments
    { arg.duration() } -> std::convertible_to<std::pair<Cost, Duration>>;
                          ^
In file included from local_search.cpp:17:
In file included from ./vendor/pyvrp/search/Exchange.h:4:
In file included from ./vendor/pyvrp/search/LocalSearchOperator.h:8:
./vendor/pyvrp/search/Route.h:26:34: error: expected concept name with optional arguments
    { arg.distance(profile) } -> std::convertible_to<Distance>;
                                 ^
./vendor/pyvrp/search/Route.h:27:34: error: expected concept name with optional arguments
    { arg.duration(profile) } -> std::convertible_to<DurationSegment>;
                                 ^
./vendor/pyvrp/search/Route.h:28:32: error: expected concept name with optional arguments
    { arg.load(dimension) } -> std::convertible_to<LoadSegment>;
                               ^
clang++ -arch arm64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -Ivendor/pyvrp -DNDEBUG -I'/Volumes/Builds/packages/big-sur-arm64/Rlib/4.5/cpp11/include' -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c vendor/pyvrp/CostEvaluator.cpp -o vendor/pyvrp/CostEvaluator.o
3 errors generated.
make: *** [solution.o] Error 1
make: *** Waiting for unfinished jobs....
6 errors generated.
make: *** [local_search.o] Error 1
In file included from vendor/pyvrp/CostEvaluator.cpp:1:
vendor/pyvrp/CostEvaluator.h:23:29: error: expected concept name with optional arguments
    { arg.excessLoad() } -> std::convertible_to<std::vector<Load>>;
                            ^
vendor/pyvrp/CostEvaluator.h:43:27: error: expected concept name with optional arguments
    { arg.distance() } -> std::convertible_to<std::pair<Cost, Distance>>;
                          ^
vendor/pyvrp/CostEvaluator.h:44:27: error: expected concept name with optional arguments
    { arg.duration() } -> std::convertible_to<std::pair<Cost, Duration>>;
                          ^
3 errors generated.
make: *** [vendor/pyvrp/CostEvaluator.o] Error 1
ERROR: compilation failed for package ‘vrpr’
* removing ‘/Volumes/Builds/packages/big-sur-arm64/results/4.5/vrpr.Rcheck/vrpr’