[Bug libstdc++/83891] std::filesystem::path::is_absolute for Windows

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83891

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue May 15 13:50:49 2018
New Revision: 260259

URL: https://gcc.gnu.org/viewcvs?rev=260259&root=gcc&view=rev
Log:
PR libstdc++/83891 fix path::is_absolute() for non-POSIX targets

The correct definition seems to be has_root_directory() for all systems
we care about.

        PR libstdc++/83891
        * include/bits/fs_path.h (path::is_absolute()): Use same definition
        for all operating systems.
        * include/experimental/bits/fs_path.h (path::is_absolute()): Likewise.
        * testsuite/27_io/filesystem/path/query/is_absolute.cc: New.
        * testsuite/27_io/filesystem/path/query/is_relative.cc: Fix comment.
        * testsuite/experimental/filesystem/path/query/is_absolute.cc: New.

Added:
    trunk/libstdc++-v3/testsuite/27_io/filesystem/path/query/is_absolute.cc
   
trunk/libstdc++-v3/testsuite/experimental/filesystem/path/query/is_absolute.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/fs_path.h
    trunk/libstdc++-v3/include/experimental/bits/fs_path.h
    trunk/libstdc++-v3/testsuite/27_io/filesystem/path/query/is_relative.cc