2013-10-02  Jonathan Wakely  <jwakely.gcc@gmail.com>
	    Daniel Krugler  <daniel.kruegler@gmail.com>

	PR libstdc++/58569
	* include/std/functional (function::_CheckResult): Move to namespace
	scope and rename to __check_func_return_type.
	* testsuite/20_util/function/58569.cc: New.

Co-Authored-By: Daniel Kruegler <daniel.kruegler@gmail.com>

From-SVN: r203132