2008-08-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/33979 (partial)
	* include/bits/postypes.h (u16streampos, u32streampos): Add.
	* include/bits/char_traits.h (char_traits<char16_t>,
	char_traits<char32_t>): Add.
	* include/bits/stringfwd.h (u16string, u32string): Add.
	* include/ext/vstring_fwd.h: Add typedefs for char16_t/char32_t.
	* testsuite/21_strings/char_traits/requirements/char32_t/typedefs.cc:
	New.
	* testsuite/21_strings/char_traits/requirements/
	explicit_instantiation/short/1.cc: Likewise.
	* testsuite/21_strings/char_traits/requirements/
	explicit_instantiation/char32_t/1.cc: Likewise.
	* testsuite/21_strings/char_traits/requirements/
	explicit_instantiation/wchar_t/1.cc: Likewise.
	* testsuite/21_strings/char_traits/requirements/
	explicit_instantiation/char16_t/1.cc: Likewise.
	* testsuite/21_strings/char_traits/requirements/
	explicit_instantiation/char/1.cc: Likewise.
	* testsuite/21_strings/char_traits/requirements/char16_t/typedefs.cc:
	Likewise.
	* testsuite/21_strings/basic_string/requirements/
	explicit_instantiation/char32_t/1.cc: Likewise.
	* testsuite/21_strings/basic_string/requirements/
	explicit_instantiation/wchar_t/1.cc: Likewise.
	* testsuite/21_strings/basic_string/requirements/
	explicit_instantiation/char16_t/1.cc: Likewise.
	* testsuite/21_strings/basic_string/requirements/
	explicit_instantiation/char/1.cc: Likewise.
	* testsuite/21_strings/headers/string/types_std_c++0x.cc: Likewise.
	* testsuite/ext/vstring/requirements/explicit_instantiation/
	char32_t/1.cc: Likewise.
	* testsuite/ext/vstring/requirements/explicit_instantiation/
	char16_t/1.cc: Likewise.

From-SVN: r139339