Found the following significant warnings:
  ./tabulate.h:5454:57: warning: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Wdeprecated-literal-operator]
  ./tabulate.h:5459:60: warning: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Wdeprecated-literal-operator]
  ./tabulate.h:5464:60: warning: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Wdeprecated-literal-operator]
  ./tabulate.h:5469:58: warning: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Wdeprecated-literal-operator]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/tabulate.Rcheck/00install.out’ for details.
* used C++ compiler: ‘Debian clang version 19.1.7 (1+b1)’
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Found the following significant warnings:
  ./tabulate.h:5454:57: warning: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Wdeprecated-literal-operator]
  ./tabulate.h:5459:60: warning: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Wdeprecated-literal-operator]
  ./tabulate.h:5464:60: warning: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Wdeprecated-literal-operator]
  ./tabulate.h:5469:58: warning: identifier '_sv' preceded by whitespace in a literal operator declaration is deprecated [-Wdeprecated-literal-operator]
See ‘/data/gannet/ripley/R/packages/tests-clang/tabulate.Rcheck/00install.out’ for details.
* used C++ compiler: ‘clang version 20.1.0’
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
installed size is  5.1Mb
  sub-directories of 1Mb or more:
    libs   4.9Mb
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential
installed size is  5.2Mb
  sub-directories of 1Mb or more:
    libs   5.1Mb
Specified C++11: please drop specification unless essential
Specified C++11: please drop specification unless essential