system_error (native_category): Remove.

2008-10-10  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/system_error (native_category): Remove.
	(posix_category): Add.
	(error_code::error_code(_ErrorCodeEnum, typename enable_if<>:type*):
	Fix _M_cat initialization.
	(error_code::operator=(_ErrorCodeEnum)): Assign _M_cat too.
	(error_condition::_M_cat, error_condtion::operator=
	(_ErrorConditionEnum)): Implement resolution of DR 804.
	(error_condition::error_condition(_ErrorConditionEnum, typename
	enable_if<>:type*): Fix.
	(error_condition::clear, error_condition::assign): Implement.
	(operator==, operator!=): Fix uglification of parameters.
	(make_error_code, make_error_condition): Define in namespace
	posix_error.
	(operator<<(basic_ostream<>&, const error_code&)): Define here.
	* include/std/ostream (operator<<(basic_ostream<>&,
	const error_code&)): Do not define here.
	* testsuite/19_diagnostics/error_condition/cons/1.cc: New.	
	* testsuite/19_diagnostics/error_condition/operators/bool.cc: Likewise.
	* testsuite/19_diagnostics/error_condition/operators/bool_neg.cc:
	Likewise.
	* testsuite/19_diagnostics/error_condition/operators/equal.cc:
	Likewise.
	* testsuite/19_diagnostics/error_condition/operators/not_equal.cc:
	Likewise.
	* testsuite/19_diagnostics/error_code/cons/1.cc: Tweak.
	* testsuite/19_diagnostics/error_category/cons/copy_neg.cc: Adjust
	dg-error line numbers.
	* testsuite/30_threads/unique_lock/locking/2.cc: Tweak.

	* testsuite/util/testsuite_error.h: Minor tweaks.
	* testsuite/util/testsuite_hooks.cc: Avoid uninitialized warning.

From-SVN: r141039