re PR c++/57709 (-Wshadow is too strict / has false positives)

gcc/cp/ChangeLog:

2014-08-22  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR c++/57709
	* name-lookup.c (pushdecl_maybe_friend_1): Do not warn if a
	declaration shadows a function declaration, unless the former
	declares a function, pointer to function or pointer to member
	function, because this is a common and valid case in real-world
	code.
	* cp-tree.h (TYPE_PTRFN_P,TYPE_REFFN_P,TYPE_PTRMEMFUNC_P):
	Improve description.

gcc/testsuite/ChangeLog:

2014-08-22  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR c++/57709
	* g++.dg/Wshadow.C: New test.

From-SVN: r214357