2011-02-16  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/47773
	* include/ext/vstring.h (hash<__gnu_cxx::__vstring>,
	hash<__gnu_cxx::__wvstring>, hash<__gnu_cxx::__u16vstring>,
	hash<__gnu_cxx::__u32vstring>): Add.
	* testsuite/ext/vstring/hash/char/1.cc: New.
	* testsuite/ext/vstring/hash/wchar_t/1.cc: Likewise.

From-SVN: r170235