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L ong/Nose :marseylongpost: Serial Serious Replyer :marseylongpost:  7mo ago (text post) 280 thread views #226327

rDramaAdvent of Code Day 4: Back on Track Edition

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Tried to use the new std::views std library which is kinda useful, but gives absolutely unhelpful error messages:

<g>\>[build] FAILED: day04/CMakeFiles/day04.dir/main.cpp.o </g>
[build] /usr/bin/ccache /usr/bin/clang++-17 -DINPUT_DIR=\"/home/ihsoy/adventofcode/inputs/\" -DSCN_HEADER_ONLY=0 -I/home/ihsoy/adventofcode/.cache/CPM/scn/ee384e4dfeb40efb93d1b2a397a81e8027027f77/include -stdlib=libc++ -g -std=c++23 -fcolor-diagnostics -MD -MT day04/CMakeFiles/day04.dir/main.cpp.o -MF day04/CMakeFiles/day04.dir/main.cpp.o.d -o day04/CMakeFiles/day04.dir/main.cpp.o -c /home/ihsoy/adventofcode/day04/main.cpp
[build] /home/ihsoy/adventofcode/day04/main.cpp:53:95: error: invalid operands to binary expression ('std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>' and 'int')
[build]    53 |         auto numbers_won = numbers_played | std::views::filter([](https://auto number) { return number%2==0; });
[build]       |                                                                                         ~~~~~~^~
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:337:10: note: in instantiation of function template specialization 'day03::solution(const std::vector<std::string> &)::(anonymous class)::operator()<std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>' requested here
[build]   337 | decltype(std::declval<_Fp>()(std::declval<_Args>()...))
[build]       |          ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:347:19: note: while substituting deduced template arguments into function template '__invoke' [with _Fp = (lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64) &, _Args = <std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)> &>]
[build]   347 |   static decltype(std::__invoke(std::declval<_XFp>(), std::declval<_XArgs>()...)) __try_call(int);
[build]       |                   ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:353:28: note: while substituting deduced template arguments into function template '__try_call' [with _XFp = (lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64) &, _XArgs = (no value)]
[build]   353 |   using _Result = decltype(__try_call<_Fp, _Args...>(0));
[build]       |                            ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:401:24: note: in instantiation of template class 'std::__invokable_r<void, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64) &, std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)> &>' requested here
[build]   401 |     : public enable_if<__invokable<_Fp, _Args...>::value, typename __invokable_r<void, _Fp, _Args...>::_Result> {};
[build]       |                        ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:452:45: note: in instantiation of template class 'std::__invoke_of<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64) &, std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)> &>' requested here
[build]   452 | struct _LIBCPP_TEMPLATE_VIS invoke_result : __invoke_of<_Fn, _Args...> {};
[build]       |                                             ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:455:1: note: (skipping 39 contexts in backtrace; use -ftemplate-backtrace-limit=0 to see all)
[build]   455 | using invoke_result_t = typename invoke_result<_Fn, _Args...>::type;
[build]       | ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__concepts/invocable.h:27:21: note: while substituting template arguments into constraint expression here
[build]    27 | concept invocable = requires(_Fn&& __fn, _Args&&... __args) {
[build]       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[build]    28 |   _VSTD::invoke(_VSTD::forward<_Fn>(__fn), _VSTD::forward<_Args>(__args)...); // not required to be equality preserving
[build]       |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[build]    29 | };
[build]       | <del>
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__ranges/range_adaptor.h:61:18: note: while checking the satisfaction of concept 'invocable<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>, std::__1::ranges::drop_view<std::__1::ranges::transform_view<std::__1::ranges::split_view<std::string_view, std::__1::ranges::single_view<char>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__transform::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>>>, std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__split_view::__fn, std::tuple<char>>>>>>>>> &>' requested here
[build]    61 |                  invocable<_Closure, _View>
[build]       |                  ^</del>~~~~~~~~~~~~~~~~~~~~~~~
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__ranges/range_adaptor.h:61:18: note: while substituting template arguments into constraint expression here
[build]    61 |                  invocable<_Closure, _View>
[build]       |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
[build] /home/ihsoy/adventofcode/day04/main.cpp:53:43: note: while checking constraint satisfaction for template 'operator|<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>>' required here
[build]    53 |         auto numbers_won = numbers_played | std::views::filter([](https://auto number) { return number%2==0; });
[build]       |                                           ^
[build] /home/ihsoy/adventofcode/day04/main.cpp:53:43: note: in instantiation of function template specialization 'std::__1::operator|<std::__1::ranges::drop_view<std::__1::ranges::transform_view<std::__1::ranges::split_view<std::string_view, std::__1::ranges::single_view<char>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__transform::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>>>, std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__split_view::__fn, std::tuple<char>>>>>>>>> &, std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>>' requested here
[build] /home/ihsoy/adventofcode/day04/main.cpp:53:43: error: invalid operands to binary expression ('invoke_result_t<__range_adaptor_closure_t<__bind_back_t<__fn, tuple<int>>>, transform_view<split_view<string_view, single_view<char>>, __range_adaptor_closure_t<__compose_t<__range_adaptor_closure_t<__bind_back_t<__fn, tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>>, __range_adaptor_closure_t<__compose_t<__range_adaptor_closure_t<__bind_back_t<__fn, tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>>>, __range_adaptor_closure_t<__bind_back_t<__fn, tuple<char>>>>>>>> &>' (aka 'std::__1::ranges::drop_view<std::__1::ranges::transform_view<std::__1::ranges::split_view<std::string_view, std::__1::ranges::single_view<char>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__transform::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>>>, std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__split_view::__fn, std::tuple<char>>>>>>>>>') and '__range_adaptor_closure_t<__bind_back_t<__fn, tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>' (aka 'std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>'))
``
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K

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>c++

>New library

Brought it on yourself tbh :marseyboo#mer:

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