re PR libstdc++/39880 (Specialisation is_error_code_enum<errc> should not exist)

re PR libstdc++/39880 (Specialisation is_error_code_enum<errc> should not exist)

2009-04-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/39880
	PR libstdc++/39881
	PR libstdc++/39882
	* include/std/system_error (is_error_code_enum<errc>): Remove.
	(error_condition<>::error_condition(_ErrorCodeEnum,)
	error_condition<>::operator=(_ErrorCodeEnum)): Use make_error_condition.
	(error_code<>::error_code(_ErrorCodeEnum,),
	error_code<>::operator=(_ErrorCodeEnum)): Use make_error_code.
	* testsuite/19_diagnostics/system_error/39880.cc: New.
	* testsuite/19_diagnostics/error_condition/modifiers/39881.cc:
	Likewise.
	* testsuite/19_diagnostics/error_condition/cons/39881.cc: Likewise.
	* testsuite/19_diagnostics/error_code/modifiers/39882.cc: Likewise.
	* testsuite/19_diagnostics/error_code/cons/39882.cc: Likewise.
	* testsuite/27_io/basic_ostream/inserters_other/char/error_code.cc:
	Adjust.
	* testsuite/27_io/basic_ostream/inserters_other/wchar_t/error_code.cc:
	Likewise.
	* testsuite/19_diagnostics/error_code/cons/1.cc: Likewise.
	* testsuite/19_diagnostics/error_code/operators/bool.cc: Likewise.
	* testsuite/19_diagnostics/error_code/operators/equal.cc: Likewise.
	* testsuite/19_diagnostics/error_code/operators/not_equal.cc:
	Likewise.
	* testsuite/19_diagnostics/error_category/cons/copy_neg.cc: Likewise.
	* testsuite/19_diagnostics/system_error/cons-1.cc: Likewise.
	* testsuite/19_diagnostics/system_error/what-4.cc: Likewise.
	* testsuite/30_threads/unique_lock/locking/2.cc: Likewise.

From-SVN: r146781