re PR c++/54440 ([c++11] g++ prematurely applying rule that a template parameter...

re PR c++/54440 ([c++11] g++ prematurely applying rule that a template parameter pack cannot be followed by a template parameter)

	PR c++/54440
	* pt.c (get_template_parm_index): New.
	(fixed_parameter_pack_p_1, fixed_parameter_pack_p): New.
	(process_template_parm): Allow bare packs in template template
	parm template parms.
	(coerce_template_parameter_pack): Handle fixed template template
	parm packs and fixed packs not at the end of the parm list.
	(coerce_template_parms): Handle template parm packs not at the end
	of the parm list.
	(gen_elem_of_pack_expansion_instantiation): Handle a decl expansion.

From-SVN: r208178