Per email forwarded by BDR and originally to@stla the 'new at CRAN' packagejack bonks:

This fails to install with LLVM clang 15.0.7 (current) with libc++ as its
(native) C++ library.

../Rcpp/include/Rcpp/sugar/functions/sapply.h:36:19: error: no template named'result_of' in namespace 'std'; did you mean 'traits::result_of'?        typedef typename ::std::result_of<Function(typenameSugarExpression::stored_type)>::type type;                         ^~~~~~~~~~~~~~~~                         traits::result_of.../Rcpp/include/Rcpp/traits/result_of.h:30:8: note: 'traits::result_of'declared herestruct result_of{       ^ ```jack 5.0.0 specifies C++20, but std::result_of was removed in that standardhaving been deprecated in C++17 according tohttps://en.cppreference.com/w/cpp/types/result_ofand replaced by invoke_result since C++17.