re PR libstdc++/13858 (Bad error handling in basic_filebuf::imbue)

re PR libstdc++/13858 (Bad error handling in basic_filebuf::imbue)

2004-02-14  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/13858
	* include/bits/fstream.tcc (basic_filebuf<>::_M_convert_to_external):
	In case of conversion errors, throw ios_failure; simplify.
	* testsuite/27_io/basic_filebuf/overflow/char/13858.cc: New.
	* testsuite/27_io/basic_filebuf/overflow/wchar_t/13858.cc: Ditto.
	* testsuite/27_io/basic_filebuf/overflow/char/9182-2.cc: Tweak,
	previously we didn't throw in case of conversion errors, instead
	just returned eof().
	* testsuite/27_io/basic_filebuf/seekoff/wchar_t/3.cc: Ditto.
	* testsuite/27_io/basic_filebuf/seekpos/wchar_t/1.cc: Ditto.
	* testsuite/27_io/basic_filebuf/sync/char/9182-1.cc: Ditto.

	* include/bits/fstream.tcc (basic_filebuf<>::overflow):
	Trivial simplification of a conditional.

From-SVN: r77812