[Bug libstdc++/83626] std::experimental::filesystem::remove_all throws exception instead of returning 0 if path doesn't exist

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83626

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Jan  4 22:58:59 2018
New Revision: 256269

URL: https://gcc.gnu.org/viewcvs?rev=256269&root=gcc&view=rev
Log:
PR libstdc++/83626 Don't throw for remove("") and remove_all("")

        PR libstdc++/83626
        * src/filesystem/ops.cc (remove(const path&, error_code&))): Remove
        redundant call to ec.clear().
        (remove_all(const path&, error_code&))): Do not return an error for
        non-existent paths.
        * src/filesystem/std-ops.cc: Likewise.
        * testsuite/27_io/filesystem/operations/remove.cc: New test.
        * testsuite/27_io/filesystem/operations/remove_all.cc: Fix expected
        results for non-existent paths.
        * testsuite/experimental/filesystem/operations/remove.cc: New test.
        * testsuite/experimental/filesystem/operations/remove_all.cc: Fix
        expected results for non-existent paths.

Added:
    trunk/libstdc++-v3/testsuite/27_io/filesystem/operations/remove.cc
      - copied, changed from r256243,
trunk/libstdc++-v3/testsuite/27_io/filesystem/operations/remove_all.cc
    trunk/libstdc++-v3/testsuite/experimental/filesystem/operations/remove.cc
      - copied, changed from r256243,
trunk/libstdc++-v3/testsuite/experimental/filesystem/operations/remove_all.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/src/filesystem/ops.cc
    trunk/libstdc++-v3/src/filesystem/std-ops.cc
    trunk/libstdc++-v3/testsuite/27_io/filesystem/operations/remove_all.cc
   
trunk/libstdc++-v3/testsuite/experimental/filesystem/operations/remove_all.cc