Define std::filesystem::path::format enum (P0430R2)
* include/bits/fs_path.h (path::format): Define new enumeration type.
(path(string_type&&), path<Source>(const Source&))
(path<InputIterator>(InputIterator, InputIterator))
(path<Source>(const Source&, const locale&))
(path<InputIterator>(InputIterator, InputIterator, const locale&)):
Add format parameter.
* testsuite/27_io/filesystem/path/construct/format.cc: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254144 138bc75d-0d04-0410-961f-82ee72b054a4