[committed] libstdc++: Fix mismatched noexcept-specifiers in Filesystem TS

[Jonathan Wakely <jwakely@redhat.com>]

Tested powerpc64le-linux, pushed to trunk.

-- >8 --

The copy_file fix should have been part of r12-7063-gda72e0fd20f87b.

The path::begin() fix should have been part of r12-3930-gf2b7f56a15d9cb.
Thanks to Timm Bäder for reporting this one.

libstdc++-v3/ChangeLog:

	* include/experimental/bits/fs_fwd.h (copy_file): Remove
	incorrect noexcept from declaration.
	* include/experimental/bits/fs_path.h (path::begin, path::end):
	Add noexcept to declarations, to match definitions.
---
 libstdc++-v3/include/experimental/bits/fs_fwd.h  | 2 +-
 libstdc++-v3/include/experimental/bits/fs_path.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/libstdc++-v3/include/experimental/bits/fs_fwd.h b/libstdc++-v3/include/experimental/bits/fs_fwd.h
index d568e9e3a73..c8fbcbc1679 100644
--- a/libstdc++-v3/include/experimental/bits/fs_fwd.h
+++ b/libstdc++-v3/include/experimental/bits/fs_fwd.h
@@ -280,7 +280,7 @@ _GLIBCXX_END_NAMESPACE_CXX11
 
   bool copy_file(const path& __from, const path& __to, copy_options __option);
   bool copy_file(const path& __from, const path& __to, copy_options __option,
-		 error_code&) noexcept;
+		 error_code&);
 
   path current_path();
 
diff --git a/libstdc++-v3/include/experimental/bits/fs_path.h b/libstdc++-v3/include/experimental/bits/fs_path.h
index a050749676d..803df424664 100644
--- a/libstdc++-v3/include/experimental/bits/fs_path.h
+++ b/libstdc++-v3/include/experimental/bits/fs_path.h
@@ -425,8 +425,8 @@ namespace __detail
     class iterator;
     typedef iterator const_iterator;
 
-    iterator begin() const;
-    iterator end() const;
+    iterator begin() const noexcept;
+    iterator end() const noexcept;
 
     /// @cond undocumented
     // Create a basic_string by reading until a null character.
-- 
2.34.1