* cpphash.h (struct definition): Move file, line, col members...

	* cpphash.h (struct definition): Move file, line, col members...
	(struct hashnode): ... here.  Also add 'disabled' flag.
	(enum node_type): Add T_VOID, T_XCONST, T_FMACRO, and
	T_IDENTITY.  Remove T_DISABLED.
	Update prototypes.

	* cpphash.c (_cpp_dump_definition): Split out dump_DEFINITION.
	(collect_expansion): Split into collect_objlike_expansion and
	collect_funlike_expansion.
	(_cpp_macroexpand): Split out scan_arguments, stringify, and
	funlike_macroexpand.
	(_cpp_compare_defs): Rename compare_defs, make static.
	(_cpp_make_hashnode): Initialize hp->disabled.
	(macro_cleanup): Adjust for new token types.  Clear
	m->disabled.
	(_cpp_create_definition): Move code here to determine what
	sort of macro it is, and code to check for redefinitions, from
	do_define.  Implement a few simple cases without creating a
	full DEFINITION.
	(_cpp_macroexpand, special_symbol, _cpp_dump_definition):
	Handle the simple cases.
	(push_macro_expansion): Set buf->has_escapes and hp->disabled
	here.

	* cppinit.c (builtin_array): Change MCONST to XCONST
	everywhere.
	* cpplex.c (maybe_macroexpand): Handle IDENTITY macros here;
	fix check for disabled and function-like macros.
	* cpplib.c (do_define): Move most logic to
	_cpp_create_definition.
	(do_undef): Handle new special token types.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@33355 138bc75d-0d04-0410-961f-82ee72b054a4