re PR c++/31431 (ICE with invalid parameter pack)

re PR c++/31431 (ICE with invalid parameter pack)

2007-05-25  Douglas Gregor <doug.gregor@gmail.com>

	PR c++/31431
	PR c++/31432
	PR c++/31434
	PR c++/31435
	PR c++/31437
	PR c++/31438
	PR c++/31442
	PR c++/31443
	PR c++/31444
	PR c++/31445
	* error.c (dump_type): Dump TYPE_ARGUMENT_PACK nodes.
	* cp-tree.h (check_for_bare_parameter_packs): Returns bool.
	* pt.c (check_for_bare_parameter_packs): Return bool indicated
	whether everything was okay. Fix indentation.
	(push_template_decl_real): Check for bare parameter packs in
	function parameters; where errors occur, mark the parameter types
	with ERROR_MARK_NODEs to avert ICEs.
	(coerce_template_parameter_pack): New.
	(coerce_template_parms): Moved parameter pack coercion into
	coerce_template_parameter_pack, and permit it anywhere in the
	template parameter list (not just at the end). Parameter and
	argument indices can vary (somewhat) separately now, so add
	PARM_IDX and ARG_IDX.
	(fn_type_unification): Don't set an argument pack as incomplete if
	no argument pack was deduced.
	(type_unification_real): If a type parameter is a parameter pack
	and has not otherwise been deduced, it will be deduced to an empty
	parameter pack.
	(more_specialized_fn): Use the actual lengths of the argument
	lists when comparing against expansions.
	* semantics.c (finish_member_declaration): If a field's type has
	bare parameter packs, error and set its type to ERROR_MARK_NODE.

2007-05-25  Douglas Gregor <doug.gregor@gmail.com>

	PR c++/31431
	PR c++/31432
	PR c++/31434
	PR c++/31435
	PR c++/31437
	PR c++/31438
	PR c++/31442
	PR c++/31443
	PR c++/31444
	PR c++/31445
	* g++.dg/cpp0x/pr31431.C: New.
	* g++.dg/cpp0x/pr31437.C: New.
	* g++.dg/cpp0x/pr31442.C: New.
	* g++.dg/cpp0x/pr31444.C: New.
	* g++.dg/cpp0x/pr31431-2.C: New.
	* g++.dg/cpp0x/pr31432.C: New.
	* g++.dg/cpp0x/pr31434.C: New.
	* g++.dg/cpp0x/pr31438.C: New.
	* g++.dg/cpp0x/pr31443.C: New.
	* g++.dg/cpp0x/pr31445.C: New.
	* g++.dg/cpp0x/variadic-crash1.C: New.

From-SVN: r125062