r272741 - in /branches/gcc-9-branch/libstdc++-v...

redi@gcc.gnu.org redi@gcc.gnu.org
Thu Jun 27 10:06:00 GMT 2019

Author: redi
Date: Thu Jun 27 10:06:09 2019
New Revision: 272741

URL: https://gcc.gnu.org/viewcvs?rev=272741&root=gcc&view=rev
PR libstdc++/91012 fixfilesystem_error::what() string

When I refactored the filesystem_error code I changed it to only use the
constructor parameter in the what() string, instead of the string
returned by system_error::what(). That meant it no longer included the
description of the error_code that system_error adds. This restores the
previous behaivour, as encouraged by the standard ("Implementations
should include the system_error::what() string and the pathnames of
path1 and path2 in the native format in the returned string").

	PR libstdc++/91012
	* src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
	for the what_arg parameters.
	(filesystem_error::filesystem_error): Pass system_error::what() to
	the _Impl constructor.
	* testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
	filesystem_error::what() contains system_error::what().


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