gcc/gcc/cp/ChangeLog

2007-05-11  Jan Hubicka  <jh@suse.cz>

	* semantics.c (expand_or_defer_fn): Do not call c_record_cdtor_fn.
	* decl2.c (start_objects): ctors and dtors are no longer public.
	(cp_write_global_declarations): Do not call c_build_cdtor_fns.
	
2007-05-07  Andrew Pinski  <andrew_pinski@playstation.sony.com>

	* typeck.c (build_unary_op): Remove code that used to
	handle non lvalue increments/decrements.

2007-05-07  Mike Stump  <mrs@apple.com>

	* parser.c (check_empty_body): Add.
	(cp_parser_iteration_statement): Add call to check_empty_body.

2007-05-05  Geoffrey Keating  <geoffk@apple.com>

	PR 31775
	* mangle.c (write_mangled_name): Mangle static variable names.
	(write_unqualified_name): Use local-source-name for
	namespace-scope static variables.

2007-05-04  Dirk Mueller  <dmueller@suse.de>

	* cp-tree.h (DECL_MAIN_P): only if -ffreestanding is
	not in effect.

2007-05-02  Seongbae Park  <seongbae.park@gmail.com>

	PR c++/31663
	* decl2.c (constrain_class_visibility): 
	Use strip_pointer_or_array_types instead of strip_array_types.

2007-04-28  Andrew Pinski  <andrew_pinski@playstation.sony.com>

	PR C++/30221
	* decl.c (reshape_init_r): Don't reshape the first element if it
	is a pointer to member function.

2007-04-27  Simon Baldwin  <simonb@google.com>

	* decl.c (grokparms): Changed message format from %qD to %qE.

2007-04-27  Douglas Gregor  <doug.gregor@gmail.com>

	* error.c (maybe_warn_variadic_templates): Variadic templates are
       now in C++0x, so only warn about them in C++98 mode.
	
2007-04-26  Andrew Pinski  <andrew_pinski@playstation.sony.com>

	PR C++/30016
	* typeck.c (build_reinterpret_cast_1): Only allow conversion to
	integeral types from vectors types.

2007-04-26  Jakub Jelinek  <jakub@redhat.com>

	PR c++/31598
	* semantics.c (finish_omp_clauses): Don't create CP_OMP_CLAUSE_INFO
	for type dependent OMP_CLAUSE_DECLs.

2007-04-24  Mark Mitchell  <mark@codesourcery.com>

	PR c++/31338
	* cp-tree.h (ARITHMETIC_TYPE): Include COMPLEX_TYPE.
	* typeck.c (type_after_usual_arithmetic_conversions): Adjust, as
	COMPLEX_TYPE is now an ARITHMETIC_TYPE.
	* init.c (build_zero_init): Adjust, as
	COMPLEX_TYPE is now a SCALAR_TYPE.
	* typeck2.c (digest_init): Allow brace-enclosed initializers for
	COMPLEX_TYPE, even though that is now a SCALAR_TYPE.

2007-04-25  Paolo Carlini  <pcarlini@suse.de>

	* semantics.c (classtype_has_nothrow_copy_or_assign_p): Adjust
	per N2255; rename as classtype_has_nothrow_assign_or_copy_p.
	(trait_expr_value): Adjust.

2007-04-23  Simon Baldwin  <simonb@google.com>

	* decl.c (grokparms): Added new error for duplicate function
	parameters names in function prototypes, to match gcc behavior.

2007-04-23  Jan Hubicka  <jh@suse.cz>

	* cp/decl2.c (finish_objects): Do not call target constructor/destructor
	bits dirrectly.

2007-04-21  Andrew Pinski  <andrew_pinski@playstation.sony.com>

	* cp-tree.h (lang_tree_node): Use GENERIC_NEXT
	instead of checking GIMPLE_STMT_P in chain_next.

2007-04-17  Mark Mitchell  <mark@codesourcery.com>

	PR c++/31513
	* call.c (convert_for_arg_passing): Convert bitfields to their
	declared types.

2007-04-17  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/31517
	* pt.c (value_dependent_expression_p): Handle MODOP_EXPRs.

2007-04-16  Seongbae Park <seongbae.park@gmail.com>

	PR c++/29365

	* cp/decl2.c (constrain_class_visibility):
	Do not warn about the use of anonymous namespace in the main input file.

2007-04-15  Mark Mitchell  <mark@codesourcery.com>

	* cp-tree.h (current_template_parms): Fix typo in comment.

2007-04-15  Kazu Hirata  <kazu@codesourcery.com>

	* cp-tree.h, error.c: Fix comment typos.

2007-04-13  Jason Merrill  <jason@redhat.com>

	PR c++/31074
	* call.c (reference_binding): Add c_cast_p parm.  If true,
	add quals to TO as needed to make it reference-compatible.

2007-04-11  Jan Hubicka  <jh@suse.cz>

	* cp/class.c (convert_to_base_statically): Fold produced tree; verify
	that we are not processing template_decl.

2007-04-09  Mark Mitchell  <mark@codesourcery.com>

	PR c++/31449
	* class.c (build_base_path): Ensure that the converted pointer has
	the same cv-qualification as the input.

2007-04-09  Paolo Carlini  <pcarlini@suse.de>

	* tree.c (cp_tree_equal): Deal with TRAIT_EXPR.

2007-04-08  Steven Bosscher  <steven@gcc.gnu.org>

	* cp-objcp-common.h (LANG_HOOKS_TREE_INLINING_ADD_PENDING_FN_DECLS):
	Do not set it.
	(LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P): Do not set it.
	* tree.c (cp_add_pending_fn_decls): Remove.
	* cp-tree.h (cp_add_pending_fn_decls): Remove prototype.

2007-04-07  Daniel Berlin  <dberlin@dberlin.org>

	Revert change removing staticp.

2007-04-06  Daniel Berlin  <dberlin@dberlin.org>

	* cp-objcp-common.c (cxx_staticp): Remove.
	* cp-objcp-common.h (LANG_HOOKS_STATICP): Remove.
	* cp-tree.h (cxx_staticp): 	

2007-04-04  Danny Smith  <dannysmith.users.sourceforge.net>

	* class.c (check_for_override): Don't remove dllmport attribute
	of virtual methods.

2007-04-03  Jakub Jelinek  <jakub@redhat.com>

	PR c++/30847
	* typeck.c (build_modify_expr): For COND_EXPR on LHS, if RHS has void
	type issue error and return early.

2007-03-30  Jason Merrill  <jason@redhat.com>

	PR c++/31187
	* typeck.c (cp_type_readonly): New fn.
	* cp-tree.h: Declare it.
	* decl.c (start_decl): Set implicit DECL_THIS_STATIC here.
	(cp_finish_decl): Not here.

2007-03-31  Richard Guenther  <rguenther@suse.de>

	* optimize.c (maybe_clone_body): Replace splay-tree usage by
	pointer-map.

2007-03-31  Douglas Gregor  <doug.gregor@gmail.com>

	PR c++/31138
	PR c++/31140
	PR c++/31141
	* parser.c (declarator_can_be_parameter_pack): New.
	(cp_parser_template_parameter): Only parse the `...' if the
	declarator can be a parameter pack.
	(cp_parser_parameter_declaration): Ditto. Also, handle when TYPE
	is NULL.
	* pt.c (find_parameter_packs_r): Look into the bounds on integer
	types (they could be used as array bounds). 
	(check_for_bare_parameter_packs): Deal with TEMPLATE_PARM_INDEX.
	(tsubst_pack_expansion): Handle failure to expand parameter
	packs.
	
2007-03-30  Paolo Carlini  <pcarlini@suse.de>

	PR c++/26099
	* cp-tree.h (enum cp_trait_kind, struct tree_trait_expr,
	TRAIT_EXPR_TYPE1, TRAIT_EXPR_TYPE2, TRAIT_EXPR_KIND): Add.
	(enum cp_tree_node_structure_enum, union lang_tree_node): Update.
	(CLASS_TYPE_NON_UNION_P): Add.
	(struct lang_type_class): Add has_complex_dflt.
	(TYPE_HAS_COMPLEX_DFLT, TYPE_HAS_TRIVIAL_DFLT): Add.
	(locate_copy, locate_ctor, locate_dtor, finish_trait_expr): Declare.
	* cp-tree.def: Add TRAIT_EXPR.
	* cp-objcp-common.c (cp_tree_size): Add TRAIT_EXPR case.
	* lex.c (struct resword): Add __has_nothrow_assign,
	__has_nothrow_constructor, __has_nothrow_copy, __has_trivial_assign,
	__has_trivial_constructor, __has_trivial_copy,
	__has_trivial_destructor, __has_virtual_destructor, __is_abstract,
	__is_base_of, __is_class, __is_convertible_to, __is_empty, __is_enum,
	__is_pod, __is_polymorphic, __is_union.
	* parser.c (cp_parser_primary_expression): Deal with the new RIDs.
	(cp_parser_trait_expr): New.
	* semantics.c (finish_trait_expr, trait_expr_value
	classtype_has_nothrow_copy_or_assign_p): New.
	* method.c (locate_copy, locate_ctor, locate_dtor): Do not define
	as static.
	* decl.c (cp_tree_node_structure): Add TRAIT_EXPR.
	* class.c (check_bases, check_field_decl, check_bases_and_members):
	Deal with TYPE_HAS_COMPLEX_DFLT (t) too.
	* pt.c (uses_template_parms, tsubst_copy_and_build,
	value_dependent_expression_p, type_dependent_expression_p): Deal with
	TRAIT_EXPR.
	* tree.c (cp_walk_subtrees): Deal with TRAIT_EXPR.

2007-03-29  Richard Guenther  <rguenther@suse.de>

	* tree.c (cp_walk_subtrees): Do not set input_location.

2007-03-28  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/29077
	* decl.c (grokfndecl): Properly setup decl if it is a constructor or a
	destructor.

2007-03-28 Douglas Gregor <doug.gregor@gmail.com>

	* parser.c (struct cp_parser): Update comment for
	greater_than_is_operator_p.
	(cp_parser_primary_expression): In C++0x mode, a cast operator can
	be terminated with a `>>' token when !GREATER_THAN_IS_OPERATOR_P.
	(TOKEN_PRECEDENCE): In C++0x mode, `>>' is treated like `>' when
	!GREATER_THAN_IS_OPERATOR_P.
	(cp_parser_binary_expression): When -Wc++0x-compat, warn about
	`>>' operators that will become two `>' tokens in C++0x.
	(cp_parser_parameter_declaration): Treat `>>' like `>' in C++0x
	mode, allowing it to terminate default arguments.
	(cp_parser_enclosed_template_argument_list): In C++0x mode, treat
	`>>' like two consecutive `>' tokens.
	(cp_parser_skip_to_end_of_template_parameter_list): Ditto.
	(cp_parser_next_token_ends_template_argument_p): In C++0x, `>>'
	ends a template argument.

2007-03-28  Douglas Gregor  <doug.gregor@gmail.com>

	* decl.c (redeclaration_error_message): Complain when redeclaring
	a friend function with default template arguments (C++0x mode only).
	* cp-tree.h (check_default_tmpl_args): Declare.
	* pt.c (check_default_tmpl_args): In C++0x mode, permit default
	template arguments in function templates. Add support for checking
	the default template arguments of friend templates.
	(push_template_decl_real): Fix call to check_default_tmpl_args.
	(type_unification_real): If a template parameter has not been
	deduced but provides a default template argument, substitute into
	that default template argument.
	* parser.c (cp_parser_init_declarator): When declaring (but not
	defining!) a function template in C++0x mode, check for default
	template arguments.

2007-03-28 Douglas Gregor <doug.gregor@gmail.com>

	PR c++/29993
	* decl.c (grokdeclarator): Deal with cv-qualified function type
	typedefs in the same way for member and non-member functions.

2007-03-26  Dirk Mueller  <dmueller@suse.de>

	* parser.c (cp_parser_member_declaration): Pedwarn
	about stray semicolons after member declarations.

2007-03-26  Paolo Carlini  <pcarlini@suse.de>

	PR c++/30500
	* pt.c (instantiate_decl): Set in_system_header.

2007-03-22  Mark Mitchell  <mark@codesourcery.com>

	* cp-tree.h (current_tempalte_parms): Improve documentation.
	* pt.c (current_template_args): Likewise.

	PR c++/30863
	* parser.c (cp_parser_parse_and_diagnose_invalid_type_name): Do
	not consume tokens when failing.

2007-03-22  Jim Wilson  <wilson@specifix.com>
	    Mark Mitchell  <mark@codesourcery.com>

	PR c++/31273
	* call.c (standard_conversion): Use type_decays_to.  Keep FCODE
	consistent with FROM.

2007-03-22  Gabriel Dos Reis  <gdr@integrable-solutions.net>

	* error.c (dump_expr): Handle dependent names that designate types.
	* cxx-pretty-print.c (pp_cxx_unqualified_id): Handle TYPENAME_TYPE.

2007-03-17  Kazu Hirata  <kazu@codesourcery.com>

	* cp-tree.def, parser.c, pt.c: Fix comment typos.

2007-03-16  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	* cvt.c (cp_convert_and_check) : Define.
	* cp-tree.h (cp_convert_and_check): Declare.
	* call.c (convert_conversion_warnings): Rename to
	conversion_null_warnings.  The warning for floating-point to
	integer is handled by convert_and_check in convert_like_real.
	(convert_like_real): convert_conversion_warnings was renamed as
	conversion_null_warnings.
	* typeck.c (build_binary_op): Use cp_convert_and_check to warn for
	overflow and changes of value during conversion.

2007-03-15  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR c++/30891
	* parser.c (cp_parser_statement): If 'namespace' is found, this
	only can be a namespace alias definition, so parse it now.
	(cp_parser_namespace_alias_definition): if we find an open brace
	instead of '=', then this is actually a misplaced namespace
	definition.
	
2007-03-15  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR c++/24924
	* decl.c (cxx_init_decl_processing): Move command-line options
	processing to c-opts.c.
	
2007-03-15  Douglas Gregor  <doug.gregor@gmail.com>

	* ptree.c (cxx_print_type): Use formatting markup for integers
	when printing template parameter index/level/orig level.
	(cxx_print_xnode): Ditto.
	* cp-tree.h (TEMPLATE_PARM_PARAMETER_PACK): Use TREE_LANG_FLAG_0.
	(struct template_parm_index_s): Remove the PARAMETER_PACK member.
	Make INDEX, LEVEL, and ORIG_LEVEL integers instead of
	HOST_WIDE_INTs.
	(struct saved_scope): Make X_PROCESSING_TEMPLATE_DECL an int,
	rather than a HOST_WIDE_INT.
	Turn X_PROCESSING_EXPLICIT_INSTANTIATION, SKIP_EVALUATION, and
	NEED_POP_FUNCTION_CONTEXT into bool bitfields; reorder fields for
	better bit-packing.
	(struct language_function): Make RETURNS_VALUE, RETURNS_NULL,
	RETURNS_ABNORMALLY, IN_FUNCTION_TRY_HANDLER, and
	IN_BASE_INITIALIZER bool bitfields.
	(struct cp_declarator): Make KIND a 4-bit field. Make
	PARAMETER_PACK_P a bool bitfield just after KIND.
	* pt.c (uses_parameter_packs): Destroy the pointer set.
	(make_pack_expansion): Ditto.
	(check_for_bare_parameter_packs): Ditto.
	* name-lookup.c (push_to_top_level): Make need_pop a bool value.
	
2007-03-14  Andrew Pinski  <andrew_pinski@playstation.sony.com>

	PR c++/31165
	* call.c  (convert_default_arg): Instead of copying the node,
	unshare it.

2007-03-15  Dirk Mueller  <dmueller@suse.de>

	PR c++/30860
	* call.c (convert_conversion_warnings): New..
	(convert_like_real): .. factored out from here.
	(convert_conversion_warnings): Add warning about
	false being converted to NULL in argument passing.

2007-03-14  Dirk Mueller  <dmueller@suse.de>

	* cp/semantics.c (c_finish_if_stmt): Call empty_if_body_warning.
	(finish_do_body): Warn about empty body in do/while statement.

2007-03-14  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	* class.c (warn_hidden): Add OPT_Woverloaded_virtual to warning.
	
2007-03-14  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR c/21438
	* typeck.c (build_binary_op): Call warn_for_div_zero instead of
	warning.
	
2007-03-13  Alexandre Oliva  <aoliva@redhat.com>

	* cp/repo.c (init_repo): Initialize random_seed saved options.
	(finish_repo): Adjust.

2007-03-13  Mark Mitchell  <mark@codesourcery.com>

	PR bootstrap/30899
	* Make-lang.in (doc/g++.1): Use $< to specify the location from
	which to copy.

2007-03-12  Seongbae Park <seongbae.park@gmail.com>

	* decl.c (compute_array_index_type): New warning flag warn_vla.

2007-03-12  Mark Mitchell  <mark@codesourcery.com>

	PR c++/30108
	* call.c (convert_default_arg): Copy non-constant arguments.

2007-03-11  Mark Mitchell  <mark@codesourcery.com>

	PR c++/31038
	* parser.c (cp_parser_postfix_expression): Disallow compound
	literals in constant expressions.

	PR c++/30328
	* semantics.c (finish_typeof): Use unlowered_expr_type.
	
2007-03-10  Mark Mitchell  <mark@codesourcery.com>

	PR c++/30274
	* cp-tree.h (unlowered_expr_type): New function.
	* typeck.c (is_bitfield_expr_with_lowered_type): Handle
	COMPOUND_EXPR, MODIFY_EXPR, and SAVE_EXPR.
	(unlowered_expr_type): New function.
	(build_unary_op): Disallow predecrements of bool bitfields.
	* call.c (build_conditional_expr): Use unlowered_expr_type.
	* pt.c (type_unification_real): Likewise.

2007-03-09  Douglas Gregor  <doug.gregor@gmail.com>

	PR c++/20599
	* typeck.c (check_return_expr): Check for bare parameter packs.
	(comptypes): Compare template parameter packs and
	type pack expansions.
	* decl.c (grokdeclarator): Deal with the declaration of function
	parameter packs.
	(grokparms): Verify that the (optional) function parameter pack is
	at the end of the parameter list.
	(xref_basetypes): Handle pack expansions in the base class.
	(cp_tree_node_structure): Handle ARGUMENT_PACK_SELECT.
	* cp-tree.def (TYPE_ARGUMENT_PACK): New.
	(NONTYPE_ARGUMENT_PACK): New.
	(TYPE_PACK_EXPANSION): New.
	(EXPR_PACK_EXPANSION): New.
	(ARGUMENT_PACK_SELECT): New.
	* cp-objcp-common.c (cp_tree_size): Compute size of
	(NON)TYPE_ARGUMENT_PACK, (TYPE|EXPR)_PACK_EXPANSION, and
	ARGUMENT_PACK_SELECT.
	* error.c (dump_template_argument): Print template argument packs.
	(dump_template_argument_list): Ditto.
	(dump_template_parameter): Dump `...' for template type parameter
	packs.
	(dump_type): Dump TYPE_PACK_EXPANSION nodes.
	(dump_parameters): Print function parameter packs.
	(dump_template_parms): Print template argument packs.
	(dump_expr): Dump EXPR_PACK_EXPANSION nodes.
	(maybe_warn_variadic_templates): New.
	* operators.def: Add ellipsis operator for EXPR_PACK_EXPANSION.
	* tree.c (cp_walk_subtrees): Walk BASELINK, TYPE_ARGUMENT_PACK,
	NONTYPE_ARGUMENT_PACK, TYPE_PACK_EXPANSION, EXPR_PACK_EXPANSION,
	CAST_EXPR. 
	* mangle.c (write_type): Mangle TYPE_PACK_EXPANSION.
	(write_template_arg): Write argument packs as separate arguments.
	* cp-tree.h (struct template_parm_index_s): Add flag that
	indicates that the template parameter is actually a parameter
	pack.
	(struct tree_argument_pack_select): New.
	(enum cp_tree_node_structure_enum): Add TS_CP_ARGUMENT_PACK_SELECT.
	(union lang_tree_node): Add argument_pack_select.
	(FUNCTION_PARAMETER_PACK_P): New.
	(PACK_EXPANSION_P): New.
	(PACK_EXPANSION_PATTERN): New.
	(SET_PACK_EXPANSION_PATTERN): New.
	(PACK_EXPANSION_PARAMETER_PACKS): New.
	(ARGUMENT_PACK_P): New.
	(ARGUMENT_PACK_ARGS): New.
	(SET_ARGUMENT_PACK_ARGS): New.
	(ARGUMENT_PACK_INCOMPLETE_P): New.
	(ARGUMENT_PACK_EXPLICIT_ARGS): New.
	(TEMPLATE_PARM_PARAMETER_PACK): New.
	(TEMPLATE_TYPE_PARAMETER_PACK): New.
	(ARGUMENT_PACK_SELECT_FROM_PACK): New.
	(ARGUMENT_PACK_SELECT_INDEX): New.
	(ARGUMENT_PACK_SELECT_ARG): New.
	(struct cp_declarator): Add parameter_pack_p flag.
	(maybe_warn_variadic_templates): Declare.
	(process_template_parm): Add bool parameter IS_PARAMETER_PACK, to
	indicate a template parameter pack. 
	(uses_parameter_packs): Declare.
	(template_parameter_pack_p): Declare.
	(template_parms_variadic_p): Declare.
	(make_pack_expansion): Declare.
	(check_for_bare_parameter_packs): Declare.
	* cxx-pretty-print.c (pp_cxx_unary_expression): Print
	sizeof... expressions. 
	(pp_cxx_expression): Print pack expansions and non-type argument
	packs.
	(pp_cxx_exception_specification): Print pack expansions. 
	(pp_cxx_direct_declarator): Print ellipsis for parameter packs.
	(pp_cxx_ctor_initializer): Print pack expansions.
	(pp_cxx_type_id): Print pack expansions.
	(pp_cxx_template_argument_list): Print argument packs.
	(pp_cxx_template_parameter): Print ellipsis for template parameter
	packs.
	* pt.c (comp_template_parms): Compare template parameter packs.
	(template_parameter_pack_p): New.
	(template_parms_variadic_p): New.
	(template_args_variadic_p): New.
	(make_ith_pack_parameter_name): New.
	(struct find_parameter_pack_data): New.
	(find_parameter_packs_r): New.
	(uses_parameter_packs): New.
	(make_pack_expansion): New.
	(check_for_bare_parameter_packs): New.
	(expand_template_argument_pack): New.
	(reduce_template_parm_level): Propagate parameter pack flag.
	(process_template_parm): Add is_parameter_pack parameter to state
	when the parameter is actually a parameter pack. Create template
	parameter packs when is_parameter_pack is true.
	(current_template_args): The argument for a template parameter
	pack is an argument pack containing a single pack expansion.
	(process_partial_specialization): When checking that non-type
	argument expressions do not involve template parameters, loop over
	the arguments in argument packs separately.
	(push_template_decl_real): Check that the type of the declaration
	does not have any bare parameter packs. Check that primary
	templates have no more than one parameter pack, and that it comes
	at the end of the template parameter list.
	(convert_template_argument): Handle coercions for pack expansion
	expressions by coercing the pattern then rebuilding the expansion.
	(coerce_template_parms): When coercing the arguments for a
	variadic template, pack "extra" arguments into an argument pack.
	(coerce_template_template_parms): Cannot coerce between parameter
	packs and non-pack parameters.
	(template_args_equal): Compare PACK_EXPANSION_P expressions.
	(comp_template_args): Expand all template arguments packs before
	comparing template argument lists.
	(mangle_class_name_for_template): Make argument packs as separate
	template arguments.
	(for_each_template_parm_r): No need to handle BASELINK. 
	(instantiate_class_template): Handle pack expansions in the base
	class list.
	(tsubst_pack_expansion): New.
	(tsubst_template_args): Handle substitutions of argument packs and
	pack expansion into template argument lists.
	(tsubst_decl): Expand function parameter packs into separate
	function parameters.
	(tsubst_arg_types): Expand a type pack expansion into separate
	argument types.
	(tsubst_exception_specification): Handle pack expansions in
	exception specifiers.
	(tsubst): See through ARGUMENT_PACK_SELECT arguments when 
	replacing a template parameter with its argument. If we encounter
	a substitution for an argument pack, just return the parameter
	itself. 
	(tsubst_copy): sizeof(X...) returns the number of elements in
	parameter pack X.  See through ARGUMENT_PACK_SELECT when the
	PARM_DECL is a parameter pack.
	(tsubst_expr): Expression pack expansions and argument packs
	cannot show up here; they will all be handled through function
	calls, sizeof, and template argument lists.
	(tsubst_copy_and_build): sizeof(X...) returns the number of
	elements in parameter pack X.  Handle pack expansions in TREE_LIST
	and CONSTRUCTOR nodes.
	(fn_type_unification): Handle "incomplete" explicit template
	argument lists that specify some of the arguments for a template
	parameter pack.
	(type_unification_real): Unify arguments against pack expansions.
	(template_parm_level_and_index): New, helper function.
	(unify_pack_expansion): New.
	(unify): Unify argument packs on an argument-by-argument basis,
	handling variadic argument packs as well.
	(more_specialized_fn): Handle unification of function parameter
	packs. All things being equal, prefer non-variadic function
	templates to variadic function templates.
	(more_specialized_class): Prefer the variadic class template
	partial specialization that binds fewer arguments to a parameter
	pack.
	(regenerate_decl_from_template): Expand function parameter packs
	into separate parameters.
	(instantiate_decl): Ditto.
	(tsubst_initializer_list): Handle pack expansions for base-class
	initializers.
	(dependent_type_p_r): Determine dependent types in argument packs
	and pack expansions.
	(value_dependent_expression_p): Determine value-dependence of
	non-type argument packs.
	(dependent_template_arg_p): Handle argument packs.
	* semantics.c (finish_cond): Check for bare parameter packs.
	(finish_expr_stmt): Ditto.
	(finish_for_expr): Ditto.
	(finish_switch_cond): Ditto.
	(finish_mem_initializers): Ditto.
	* name-lookup.c (arg_assoc_type): Handle pack expansions and
	argument packs.
	* decl2.c (cp_build_parm_decl): Mark function parameter packs.
	* parser.c (make_declarator): Declarator is not an expansion.
	(make_pointer_declarator): Transfer parameter pack flag to outer
	declarator.
	(make_reference_declarator): Ditto.
	(make_ptrmem_declarator): Ditto.
	(make_call_declarator): Ditto.
	(make_array_declarator): Ditto.
	(cp_parser_postfix_expression): Allow pack expansion expressions
	in the argument list for a call expression.
	(cp_parser_parenthesized_expression_list): Add new parameter
	ALLOW_EXPANSION_P. When true, parse the ellipsis to mean "expand
	into separate arguments."
	(cp_parser_new_placement): Allow pack expansion expressions.
	(cp_parser_new_initializer): Ditto.
	(cp_parser_mem_initializer_list): Allow ellipsis to create a
	base-class initializer expansion.
	(cp_parser_mem_initializer): Ditto.
	(cp_parser_template_parameter_list): Keep track of whether the
	template parameter is a template parameter pack.
	(cp_parser_template_parameter): Parse the ellipsis to indicate a
	template parameter pack.
	(cp_parser_type_parameter): Ditto.
	(cp_parser_template_argument_list): Parse the ellipsis to indicate
	a pack expansion.
	(cp_parser_direct_declarator): Parse the ellipsis to indicate that
	this declarator is a parameter pack.
	(cp_parser_parameter_declaration): The ellipsis does not end the
	parameter declaration, because it might be a parameter pack. Parse
	the ellipsis to indicate a parameter pack.
	(cp_parser_initializer): Allow pack expansions.
	(cp_parser_initializer_list): Allow ellipsis to create an
	initializer expansion.
	(cp_parser_base_clause): Allow ellipsis to create a base specifier
	expansion.
	(cp_parser_type_id_list): Allow ellipsis to create an exception
	specifier expansion.
	(cp_parser_attribute_list): Don't allow pack expansions.
	(cp_parser_functional_cast): Allow pack expansions.
	(cp_parser_sizeof_operand): Allow ellipsis following "sizeof" to
	compute the length of a parameter pack.
	(cp_parser_next_token_ends_template_argument_p): An ellipsis can
	end a template argument.
	* tree.c (cp_walk_subtrees): Walk BASELINK, TYPE_ARGUMENT_PACK,
	NONTYPE_ARGUMENT_PACK, TYPE_PACK_EXPANSION, EXPR_PACK_EXPANSION,
	CAST_EXPR. 

2007-03-09  Dirk Mueller  <dmueller@suse.de>

	* cp/call.c (build_new_op): Call warn_logical_operator.

2007-03-08  Volker Reichelt  <reichelt@netcologne.de>

	PR c++/30852
	* semantics.c (finish_offsetof): Handle COMPOUND_EXPR.

	PR c++/30534
	* pt.c (any_template_arguments_need_structural_equality_p):
	Robustify.

2007-03-08  Alexandre Oliva  <aoliva@redhat.com>

	* decl.c (grokdeclarator): Disable warnings for anonymous
	bitfields.

2007-03-05  Volker Reichelt  <reichelt@netcologne.de>

	* typeck2.c (readonly_error): Always emit a hard error.
	Remove last argument.
	* cp-tree.h (readonly_error): Adjust prototype.
	* semantics.c (finish_asm_stmt): Adjust call to readonly_error.
	* typeck.c (build_unary_op): Likewise.
	(build_modify_expr): Likewise.

2007-03-04  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/30895
	* tree.c (cp_tree_equal): Properly handle COMPLEX_CST trees.

2007-03-03  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR c++/15787
	* parser.c (struct cp_parser): New IN_IF_STMT.
	(cp_parser_statement_seq_opt): Handle an unexpected 'else',
	returning if parsing the body of an 'if' statement or issuing an
	error and continuing.
	(cp_parser_selection_statement): Set IN_IF_STMT bit when parsing
	body of 'if'.
	(cp_parser_jump_statement): Mask new IN_IF_STMT bit.
	
2007-03-02  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/28253
	* class.c (update_vtable_entry_for_fn): Properly handle invalid overriders
	for thunks.

2007-03-02  Geoffrey Keating  <geoffk@apple.com>

	* g++spec.c (lang_specific_driver): Add -lstdc++ when compiling
	Objective-C++.  Don't exit early if -shared-libgcc needs to be
	added.

2007-03-02  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	* typeck.c (common_base_type): Delete unused function.
	
2007-03-01  Brooks Moses  <brooks.moses@codesourcery.com>

	* Make-lang.in: Add dummy lang.install-pdf target.

2007-03-01  Simon Baldwin <simonb@google.com>

	PR c++/23689
	* decl.c (check_tag_decl): Added new warning for typedef ignored
	when it precedes an otherwise valid non-typedef declaration.

2007-02-28  Sandra Loosemore  <sandra@codesourcery.com>

	* typeck.c (build_function_call): Store converted arguments
	in a stack-allocated array instead of building a list.
	(convert_arguments): Store arguments in the array passed in as an
	argument, and return the actual number of arguments.
	* call.c (build_call): Delete, and replace with...
	(build_call_n, build_call_a): New.
	(build_op_delete_call): Rewrite to avoid constructing argument lists.
	(build_over_call): Store converted arguments in a stack-allocated
	array instead of building a list.
	(build_cxx_call): Pass arguments in an array instead of as a list.
	(build_java_interface_fn_ref): Rewrite to avoid constructing
	argument lists.
	* tree.h: Update declarations to reflect above changes.
	* method.c (use_thunk): Use a stack-allocated array to hold
	the arguments instead of a list.
	* rtti.c (throw_bad_cast): Update call to cxx_call.
	(throw_bad_typeid): Likewise.
	(build_dynamic_cast_1): Likewise.
	* init.c (build_builtin_delete_call): Use build_call_n.
	* decl.c (expand_static_init): Likewise.
	* except.c (cp_protect_cleanup_actions): Likewise.
	* cp-gimplify.c (genericize_eh_spec_block): Likewise.
	(gimplify_must_not_throw_expr): Likewise.
	(cxx_omp_apply_fn): Use build_call_a.

2007-02-26  Mark Mitchell  <mark@codesourcery.com>

	* semantics.c (expand_or_defer_fn): Call c_record_cdtor_fn.
	* decl2.c (cp_write_gloabl_declarations): Call c_build_cdtor_fns.

2007-02-25  Mark Mitchell  <mark@codesourcery.com>

	* cp-tree.h (static_ctors): Remove.
	* cp-tree.h (static_dtors): Likewise.
	* cp-objcp-common.c (decl_shadowed_for_var_lookup): Adjust for
	refactoring of tree_map hierarchy.
	(decl_shadowed_for_var_insert): Likewise.
	* semantics.c (expand_body): Use c_expand_body.
	(expand_or_defer_fn): Don't update static_ctors or static_dtors.
	* decl2.c (static_ctors): Remove.
	(static_dtors): Likewise.
	(generate_ctor_or_dtor_function): Pass NULL_TREE to
	objc_generate_static_init_call.  Do not call static_[cd]tors.
	(generate_ctor_and_dtor_functions_for_priority): Do not check for
	static_[cd]tors.
	(cp_write_global_declarations): Likewise.

2007-02-23  Richard Guenther  <rguenther@suse.de>

	* class.c (note_name_declared_in_class): Make declaration
	changes meaning a pedwarn.

2007-02-22  Michael Matz  <matz@suse.de>

	PR c++/29433
	* cp-tree.h (TFF_UNQUALIFIED_NAME): New formatting flag.
	* error.c (dump_aggr_type, dump_simple_decl, dump_decl,
	dump_function_decl): Guard emitting outer scopes by new flag.
	* cp-lang.c (cxx_dwarf_name): New function.
	(LANG_HOOKS_DWARF_NAME): Define to cxx_dwarf_name.
	* pt.c (classtype_mangled_name, mangle_class_name_for_template):
	Remove functions.
	(push_template_decl_real, lookup_template_class): Remove calls
	to above functions.

2007-02-19  Mark Mitchell  <mark@codesourcery.com>

	* call.c (build_new_method_call): Ensure that explicit calls of
	destructors have type "void".

2007-02-19  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	* typeck.c (build_binary_op): Replace -Wstring-literal-comparison
	and -Walways-true with -Waddress.
	* cvt.c (convert_to_void): Replace unconditional warning with
	-Waddress.

2007-02-18  Kazu Hirata  <kazu@codesourcery.com>

	* decl.c, tree.c: Fix comment typos.

2007-02-15  Andrew Pinski  <andrew_pinski@playstation.sony.com>

	PR C++/30158
	* semantics.c (finish_stmt_expr_expr): Set TREE_TYPE of the 
	statement expression if we had an error mark node.
	        
2007-02-15  Sandra Loosemore  <sandra@codesourcery.com>
	    Brooks Moses  <brooks.moses@codesourcery.com>
	    Lee Millward  <lee.millward@codesourcery.com>

	* cp-tree.def (AGGR_INIT_EXPR): Adjust documentation.
	Change class to tcc_vl_exp.

	* call.c (build_call): Use build_call_list instead 
	of build3. 
	(build_over_call): Likewise.
	(build_new_method_call): Use build_min_non_dep_call_list 
	instead of build_min_non_dep.

	* error.c (dump_call_expr_args): New function.
	(dump_aggr_init_expr_args): New function.
	(dump_expr) <AGGR_INIT_EXPR, CALL_EXPR, INDIRECT_REF>: Use them. 
	Update to use new CALL_EXPR and AGGR_INIT_EXPR accessor macros.

	* cvt.c (convert_to_void): Use build_call_array instead
	of build3; use new AGGR_INIT_EXPR accessor macros.

	* mangle.c (write_expression): Use TREE_OPERAND_LENGTH
	instead of TREE_CODE_LENGTH.

	* dump.c (cp_dump_tree) <AGGR_INIT_EXPR>: Update to use new
	AGGR_INIT_EXPR accessor macros.

	* cp-gimplify.c (cp_gimplify_init_expr): Use 
	AGGR_INIT_EXPR_SLOT to set the slot operand.

	* cp-tree.h (AGGR_INIT_EXPR_FN): New macro.
	(AGGR_INIT_EXPR_SLOT): New macro.
	(AGGR_INIT_EXPR_ARG): New macro.
	(aggr_init_expr_nargs): New macro.
	(AGGR_INIT_EXPR_ARGP): New macro.
	(aggr_init_expr_arg_iterator): New.
	(init_aggr_init_expr_arg_iterator): New.
	(next_aggr_init_expr_arg): New.
	(first_aggr_init_expr_arg): New.
	(more_aggr_init_expr_args_p): New.
	(FOR_EACH_AGGR_INIT_EXPR_ARG): New.
	(stabilize_aggr_init): New declaration.
	(build_min_non_dep_call_list): Likewise.

	* tree.c (process_aggr_init_operands): New function.
	(build_aggr_init_array) New function.
	(build_cplus_new): Update to use new CALL_EXPR and
	AGGR_INIT_EXPR accessor macros. Replace use of build3 with
	build_aggr_init_array.
	(build_min_non_dep_call_list) New function.
	(build_min_nt): Assert input code parameter is not a variable
	length expression class.
	(build_min, build_min_non_dep): Likewise.
	(cp_tree_equal) <CALL_EXPR>: Iterate through the arguments
	to check for equality instead of recursing. Handle tcc_vl_exp
	tree code classes.
	(stabilize_call): Update to only handle CALL_EXPRs, not 
	AGGR_INIT_EXPRs; use new CALL_EXPR accessor macros.
	(stabilize_aggr_init): New function.
	(stabilize_init): Use it.

	* cxx-pretty-print.c (pp_cxx_postfix_expression)
	<AGGR_INIT_EXPR, CALL_EXPR>: Update to use new CALL_EXPR and
	AGGR_INIT_EXPR accessor macros and argument iterators.
	
	* pt.c (tsubst_copy) <CALL_EXPR>: Replace build_nt with
	build_vl_exp. Iterate through the operands, recursively 
	processing each one.
	(tsubst_copy_and_build) <CALL_EXPR>: Update to use new
	CALL_EXPR accessor macros.
	(value_dependent_expression_p) <default>: Handle tcc_vl_exp
	tree code classes. Use TREE_OPERAND_LENGTH instead of 
	TREE_CODE_LENGTH.

	* semantics.c (finish_call_expr): Use build_nt_call_list
	instead of build_nt.
	(simplify_aggr_init_expr): Update to use new AGGR_INIT_EXPR 
	accessor macros. Use build_call_array to construct the 
	CALL_EXPR node instead of build3
	
	* decl2.c (build_offset_ref_call_from_tree): Use 
	build_nt_call_list and build_min_non_dep_call_list instead
	of build_min_nt and build_min_non_dep.

	* parser.c (cp_parser_postfix_expression) <CPP_OPEN_PAREN>:
	Use build_nt_call_list instead of build_min_nt.

2007-02-15  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR c++/28943
	* call.c (build_conditional_expr): Improve error message.
	
2007-02-13  Dirk Mueller  <dmueller@suse.de>

	* friend.c (do_friend): Annotate warning about friend
	declarations in templates with OPT_Wnon_template_friend.
	Convert informal message from warning() to inform().

2007-02-12  Simon Martin  <simartin@users.sourceforge.net>
	    Mark Mitchell  <mark@codesourcery.com>

	PR c++/14622
	* pt.c (do_decl_instantiation): Detect type mismatches in explicit
	instantiations for variables.

2007-02-12  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR middle-end/7651
	* cp-gimplify.c (gimplify_expr_stmt): Don't check extra_warnings.
	Check warn_unused_value just once.

2007-02-11  Mark Mitchell  <mark@codesourcery.com>

	PR c++/26988
	* pt.c (determine_specialization): Use skip_artificial_parms_for.
	(fn_type_unificiation): Likewise.
	(get_bindings): Likewise.

o2007-02-06  Mark Mitchell  <mark@codesourcery.com>

	PR target/29487
	* decl.c (finish_function): Use DECL_REPLACEABLE.
	* tree.c (cp_cannot_inline_tree_fn): Likewise.

2007-02-10  Gabriel Dos Reis  <gdr@integrable-solutions.net>

	* parser.c (cp_parser_primary_expression): Reformat overly long lines.

2007-02-10  Richard Henderson  <rth@redhat.com>, Jakub Jelinek  <jakub@redhat.com>

	* decl.c (grokvardecl): Don't error if !have_tls.
	(grokdeclarator): Likewise.
	* parser.c (cp_parser_omp_threadprivate): Likewise.

2007-02-07  Jakub Jelinek  <jakub@redhat.com>

	PR c++/30703
	* cp-gimplify.c (cp_genericize_r): Don't dereference invisiref
	parameters and result decls in omp clauses.
	(cxx_omp_privatize_by_reference): Pass also invisiref PARM_DECLs
	by reference.

2007-02-05  Dirk Mueller  <dmueller@suse.de>

	PR bootstrap/30510
	* parser.c (cp_parser_class_specifier): Always initialize bases.

2007-02-05  Paolo Bonzini  <bonzini@gnu.org>

	* cp-tree.h (OMP_ATOMIC_CODE): Delete.
	(OMP_ATOMIC_DEPENDENT_P): Rewrite.
	* pt.c (tsubst_expr): Adjust for new format of dependent OMP_ATOMIC
	expressions.
	* semantics.c (finish_omp_atomic): Store a whole expression node
	in operand 1, and integer_zero_node in operand 0, for dependent
	OMP_ATOMIC.  Rewrite to make flow easier to understand.

2007-02-03  Gabriel Dos Reis  <gdr@integrable-solutions.net>

	* decl.c (grokdeclarator): Use OPT_Wreturn_type instead of 0.

2007-02-04  Kazu Hirata  <kazu@codesourcery.com>

	* class.c, cp-tree.h, decl.c, decl2.c, g++spec.c, init.c,
	parser.c, pt.c, tree.c, typeck.c: Follow spelling conventions.

2007-02-03  Douglas Gregor  <doug.gregor@gmail.com>

       * parser.c (cp_lexer_get_preprocessor_token): Attach the C++0x
       keyword warning to -Wc++0x-compat.
	
2007-02-03  Gabriel Dos Reis  <gdr@integrable-solutions.net>

	* decl.c (grokdeclarator): Update documentation.

2007-02-02  Jakub Jelinek  <jakub@redhat.com>

	PR c++/30536
	* decl.c (grokdeclarator): If __thread is used together with
	a storage class other than extern and static, clear thread_p
	after issuing diagnostics and fall through to checking the
	storage class.

2007-01-30  Roger Sayle  <roger@eyesopen.com>

	* error.c (dump_type_suffix): Avoid use of cp_build_binary_op when
	calculating the size of an array (to avoid recursive errors).

2007-01-30  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR c++/24745
	* typeck.c (build_binary_op): Fix logic for warning. Move warning
	to -Wpointer-arith.
	* call.c (convert_like_real): Don't warn when converting to
	boolean type.
	
2007-01-29  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	* decl.c (pop_label): Replace warning with call to
	warn_for_unused_label.

2007-01-28  Andrew Pinski  <pinskia@gmail.com>

	PR C++/28988
	* semantics.c (finish_pseudo_destructor_expr): Check the
	destrutor name by calling check_dtor_name.

2007-01-24  Douglas Gregor  <dgregor@osl.iu.edu>

	* lex.c (D_CPP0X): Rename.
	(D_CXX0X): To this.
	(reswords): D_CPP0X -> D_CXX0X.
	(init_reswords): Ditto.
	* parser.c (cp_lexer_get_preprocessor_token): Warn about the use
	of C++0x keywords as identifiers.

2007-01-23  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/27492
	* decl.c (duplicate_decls): Don't reset DECL_INVALID_OVERRIDER_P for
	function decls.

2007-01-23  Ian Lance Taylor  <iant@google.com>

	* typeck.c (convert_for_assignment): Only warn about a = b = c
	when converting to bool.

2007-01-23  Roger Sayle  <roger@eyesopen.com>

	* call.c (null_ptr_cst_p): Replace use of TREE_CONSTANT_OVERFLOW with
	TREE_OVERFLOW.
	* typeck.c (ignore_overflows): Remove the remaining uses of
	TREE_CONSTANT_OVERFLOW.

2007-01-20  Jan Hubicka  <jh@suse.cz>

	* decl2.c (start_objects, start_static_storage_duration_function):
	Do not make the functions uninlinable.

2007-01-17  Ian Lance Taylor  <iant@google.com>

	* class.c (add_method): Call VEC_reserve_exact rather than passing
	a negative size to VEC_reserve.

2007-01-11  Simon Martin  <simartin@users.sourceforge.net>

	PR c++/29573
	* tree.c (cp_tree_equal): Properly handle MODOP_EXPR trees.

2007-01-10  Mark Mitchell  <mark@codesourcery.com>

	PR c++/28999
	* decl.c (make_typename_type): If the qualified name is not a
	type, issue an error.
	* parser.c (cp_parser_elaborated_type_specifier): Fix comment
	formatting.

2007-01-08  Geoffrey Keating  <geoffk@apple.com>

	* rtti.c: Include target.h.
	(emit_support_tinfos): If ! targetm.cxx.library_rtti_comdat (),
	don't emit typeinfo for fundamental types as weak.
	* Make-lang.in (cp/rtti.o): Update and correct dependencies.

2007-01-08  Richard Guenther  <rguenther@suse.de>

	* cvt.c (cp_convert_to_pointer): Use build_int_cst_type.

2007-01-08  Mark Shinwell  <shinwell@codesourcery.com>

	* call.c (standard_conversion): Pass flag to
	vector_types_convertible_p to disallow emission of note.
	* typeck.c (convert_for_assignment): Pass flag to
	vector_types_convertible_p to allow emission of note.
	(ptr_reasonably_similar): Pass flag to vector_types_convertible_p
	to disallow emission of note.

2007-01-07  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR c++/28986
	* typeck.c (build_binary_op): Call overflow_warning if
	TREE_OVERFLOW_P is true for the result and not for any of the
	operands.
	
2007-01-06  Lee Millward  <lee.millward@codesourcery.com>

       PR c++/19439
       * class.c (add_method): Don't wait until template
       instantiation time to complain about duplicate methods.
	
2007-01-05  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

	PR c/19978
	* semantics.c (finish_unary_op_expr): Warn only if result
	overflowed and operands did not.

2007-01-05  Ian Lance Taylor  <iant@google.com>

	* typeck.c (build_binary_op): Warn about comparing a non-weak
	address to NULL.

2007-01-05  Douglas Gregor  <doug.gregor@gmail.com>

	* pt.c (tsubst): Propagate the need for structural equality checks
	when reducing the level of template parameters.

2007-01-03  Kazu Hirata  <kazu@codesourcery.com>

	* pt.c: Fix a comment typo.

2007-01-02  Ian Lance Taylor  <iant@google.com>

	* semantics.c (maybe_convert_cond): Optionally warn when using an
	assignment as a condition.
	* typeck.c (convert_for_assignment): Optionally warn about
	assigning the result of an assignment to a bool.

2007-01-02  Douglas Gregor  <doug.gregor@gmail.com>

	* pt.c (canonical_template_parms): Correct typo in comment.
	
2007-01-02  Douglas Gregor  <doug.gregor@gmail.com>

	* typeck.c (structural_comptypes): Renamed from "comptypes".
	(comptypes): Use canonical type information to perform fast type
	comparison. When VERIFY_CANONICAL_TYPES, verify that the
	canonical type comparison returns the same results as we would see
	from the current, structural check. Support COMPARE_STRUCTURAL
	when we need structural checks.
	* decl.c (typename_compare): Fix comment.
	(build_typename_type): TYPENAME_TYPE nodes require structural
	equality checks, because they resolve different based on the
	current class type.
	(make_unbound_class_template): UNBOUND_CLASS_TEMPLATE nodes
	require structural equality checks (for now).
	(build_ptrmemfunc_type): Build the canonical pointer to member
	function type.
	(compute_array_index_type): Whenever we build a new index type
	to represent the size of an array in a template, we need to mark
	this index type as requiring structural equality. This goes for
	arrays with value-dependent sizes with the current ABI, or all
	arrays with ABI-1.
	* tree.c (cplus_array_hash): New.
	(struct cplus_array_info): New.
	(cplus_array_compare): New.
	(cplus_array_htab): New.
	(build_cplus_array_type_1): Use a hash table to cache the array
	types we build. Build the canonical array type for each array
	type.
	(cp_build_qualified_type_real): When building a cv-qualified array
	type, use the hash table of array types and build canonical array
	types as necessary.
	(bind_template_template_parm): BOUND_TEMPLATE_TEMPLATE_PARM nodes
	use structural equality (for now).
	* cp-tree.h (COMPARE_STRUCTURAL): New.
	* pt.c (canonical_template_parms): New.
	(canonical_type_parameter): New.
	(process_template_parm): Find the canonical type parameter.
	(lookup_template_class): When we have named the primary template
	type, set the canonical type for our template class to the primary
	template type. If any of the template arguments need structural
	equality checks, the template class needs structural equality
	checks.
	(tsubst): When reducing the level of a template template
	parameter, we require structural equality tests for the resulting
	parameter because its template parameters have not had their types
	canonicalized. When reducing a template type parameter, find the
	canonical reduced type parameter.
	(any_template_arguments_need_structural_equality_p): New.