* cplus-dem.c (optable): Add sizeof.
	(demangle_template_value_parm): New function containing code
	previously found in demangle_template.
	(demangle_integral_value): New function which handles complicated
	integral expressions.
	(demangle_template): Use them.
	* error.c (dump_expr): Remove unused variable `l'.
	* pt.c (for_each_template_parm): New function, created by
	converting uses_template_parms.
	(tree_fn_t): New typedef.
	(uses_template_parms): Use it.
	(mark_template_parm): New function.
	(push_template_decl): Check that the argument list of a partial
	specialization uses all the template parameters.
	* Make-lang.in (c++filt): Don't delete cxxmain.c after we're done
	with it; we might want it for debugging.
	* cp-tree.h (type_unification): Change interface.
	* class.c (finish_struct_1): Skip nested template types, just like
	ordinary nested types.
	(instantiate_type): Use new interface to type_unification.
	* lex.c (init_lex): Add __sz as opname for sizeof.
	* method.c (build_overload_scope_ref): New function.
	(build_overload_int): Handle complex expressions.  Set
	numeric_output_need_bar if necessary.
	(build_overload_value): Handle non-PARM_DECL nodes; this
	routine is now used by build_overload_int.  Remove some
	assignments to numeric_output_need_bar.  Use
	build_overload_scope_ref.
	(build_qualified_name): Note that some template mangled names end
	with digits, and set numeric_output_need_bar appropriately.  Use
	build_underscore_int.
	* pt.c (unify): Change interface.
	(type_unification_real): Likewise.
	(determine_specialization): Use new interfaces.
	(tsubst): Deal gracefully with situations in which the argument
	vector is not fully filled.
	(fn_type_unification): Use new interfaces.
	(type_unification): Likewise.  Remove NOP_EXPR hack.
	(type_unification_real): Likewise.
	(unify): Likewise.  Deal with unification of complex expresions.

From-SVN: r18795