filesystem::basename is completely erratic

[Richard B. Kreckel <kreckel@…>]

The attached program shows that basename is broken. I've tried 1.33.1, where it prints (as I would have expected):

a a b b c c d d e e

Using 1.35.0, 1.40.0, 1.42.0, it prints:

a b / c d e

Observe the exceptional behavior of basename("a/b/") returning "/".

IMHO, basename's behaviour shouldn't differ from Posix's basename.

[anonymous]

Reproducible on Debian GNU/Linux kernel 2.6.32-3-amd64. According to the filesystem documentation, though, basename is a deprecated convenience function.

[Beman Dawes]

Sorry for the delay in closing this issue. The function is now a member of path, and has been renamed stem(). The actual problem was fixed years ago.

A reworked version of the test program was tested against the current version of the library:

#include <iostream>
#include <boost/filesystem.hpp>
using boost::filesystem::path;

int main()
{
  std::cout << path("a").stem() << std::endl;
  std::cout << path("a/").stem() << std::endl;
  std::cout << path("a/b").stem() << std::endl;
  std::cout << path("a/b/").stem() << std::endl;
  std::cout << path("a/b/c").stem() << std::endl;
  std::cout << path("a/b/c/").stem() << std::endl;
  std::cout << path("a/b/c/d").stem() << std::endl;
  std::cout << path("a/b/c/d/").stem() << std::endl;
  std::cout << path("a/b/c/d/e").stem() << std::endl;
  std::cout << path("a/b/c/d/e/").stem() << std::endl;
  return 0;
}

Output:

"a"
"."
"b"
"."
"c"
"."
"d"
"."
"e"
"."

That is the expected output according to the C++ Filesystem TS, which is now the base document for boost.filesystem.

Thanks,

--Beman