Make directory iterators become end iterator on error

	* src/filesystem/dir.cc (open_dir): Return same value for errors
	whether ignored or not.
	(_Dir::advance(error_code*, directory_options)): Return false on
	error.
	(directory_iterator(const path&, directory_options, error_code*)):
	Create end iterator on error (LWG 2723).
	(recursive_directory_iterator(const path&, directory_options,
	error_code*)): Likewise.
	* testsuite/experimental/filesystem/iterators/directory_iterator.cc:
	Update expected behaviour on error.
	* testsuite/experimental/filesystem/iterators/
	recursive_directory_iterator.cc: Likewise.

From-SVN: r241486

1 files changed, 2 insertions, 2 deletions

diff --git a/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc b/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc
index 37b26066774..b41c394b41a 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc
@@ -34,7 +34,7 @@ test01()
   const auto p = __gnu_test::nonexistent_path();
   fs::recursive_directory_iterator iter(p, ec);
   VERIFY( ec );
-  VERIFY( iter != fs::recursive_directory_iterator() );
+  VERIFY( iter == fs::recursive_directory_iterator() );
 
   // Test empty directory.
   create_directory(p, fs::current_path(), ec);
@@ -60,7 +60,7 @@ test01()
   VERIFY( !ec );
   iter = fs::recursive_directory_iterator(p, ec);
   VERIFY( ec );
-  VERIFY( iter != fs::recursive_directory_iterator() );
+  VERIFY( iter == fs::recursive_directory_iterator() );
 
   // Test inaccessible directory, skipping permission denied.
   const auto opts = fs::directory_options::skip_permission_denied;