re PR c++/31439 (ICE with variadic template and broken specialization)

re PR c++/31439 (ICE with variadic template and broken specialization)

2007-11-06  Douglas Gregor  <doug.gregor@gmail.com>

	PR c++/31439
	PR c++/32114
	PR c++/32115
	PR c++/32125
	PR c++/32126
	PR c++/32127
	PR c++/32128
	PR c++/32253
	PR c++/32566
	* typeck.c (check_return_expr): Pass address of retval to
	check_for_bare_parameter_packs.
	* class.c (build_base_field): Tolerate bases that have no layout
	due to errors.
	(end_of_base): Ditto.
	* tree.c (canonical_type_variant): Be careful with
	ERROR_MARK_NODE.
	* cp-tree.h (check_for_bare_parameter_packs): Now accepts a
	tree*.
	* pt.c (find_parameter_pack_data): Add set_packs_to_error field,
	which states whether parameter packs should be replaced with
	ERROR_MARK_NODE.
	(find_parameter_packs_r): Pass addresses to cp_walk_tree wherever
	possible. If set_packs_to_error is set true, replace the parameter
	pack with ERROR_MARK_NODE. Manage our own pointer sets.
	(uses_parameter_packs): Don't set parameter packs to
	ERROR_MARK_NODE.
	(check_for_bare_parameter_packs): Now takes a pointer to a tree,
	which may be modified (if it is a parameter pack). Instructs
	find_parameter_packs_r to replace parameter packs with
	ERROR_MARK_NODE (so that they won't cause errors later on).
	(process_template_parm): Pass pointer to
	check_for_bare_parameter_packs.
	(process_partial_specialization): Replace pack expansions before
	the end of the template argument list with ERROR_MARK_NODE.
	(push_template_decl_real): Pass pointer to
	check_for_bare_parameter_packs. Replace parameter packs not at the
	end of the template parameter list with ERROR_MARK_NODE.
	(convert_template_argument): Be more careful about using DECL_NAME
	on only declarations.
	(unify): Can't unify against ERROR_MARK_NODE.
	* semantics.c (finish_cond): Pass pointer to
	check_for_bare_parameter_packs.
	(finish_expr_stmt): Ditto.
	(finish_for_expr): Ditto.
	(finish_switch_cond): Pass pointer to
	check_for_bare_parameter_packs, and call it before we put the
	condition into the statement.
	(finish_mem_initializers): Pass pointer to
	check_for_bare_parameter_packs.
	(finish_member_declaration): Ditto.
	* parser.c (cp_parser_base_clause): Ditto.

2007-11-06  Douglas Gregor  <doug.gregor@gmail.com>

	* testsuite/g++.dg/parser/crash36.C: Tweak expected errors.
	* testsuite/g++.dg/cpp0x/pr31439.C: New.
	* testsuite/g++.dg/cpp0x/pr32114.C: New.
	* testsuite/g++.dg/cpp0x/pr32115.C: New.
	* testsuite/g++.dg/cpp0x/pr32125.C: New.
	* testsuite/g++.dg/cpp0x/pr32126.C: New.
	* testsuite/g++.dg/cpp0x/pr32127.C: New.
	* testsuite/g++.dg/cpp0x/pr32128.C: New.
	* testsuite/g++.dg/cpp0x/pr32253.C: New.
	* testsuite/g++.dg/cpp0x/pr32566.C: New.
	* testsuite/g++.dg/cpp0x/pr31445.C: Tweak expected errors.
	* testsuite/g++.dg/cpp0x/pr31438.C: Ditto.
	* testsuite/g++.dg/cpp0x/variadic81.C: Ditto.
	* testsuite/g++.dg/cpp0x/pr31432.C: Ditto.
	* testsuite/g++.dg/cpp0x/pr31442.C: Ditto.

From-SVN: r129928