If config.h defines MUDOS_TYPEFUNCS, the following macros will be
defined.

	intp(var)	returns 1 if var is of type int
	floatp(var)	returns 1 if var is of type float
	stringp(var)	returns 1 if var is of type string
	objectp(var)	returns 1 if var is of type object
	arrayp(var)	returns 1 if var is of type mixed*
	mapp(var)	returns 1 if var is of type mapping

With MUDOS_EXTRA_TYPEFUNCS being defined in config.h, some extra
namespace-baggage is also included (for backwards compatibility).

	pointerp(var)	returns 1 if var is of type mixed*
	mappingp(var)	returns 1 if var is of type mapping

Otherwise, these functions will return 0.

NOTICE
	For checking a variable for several types at once, the use
        of switch combined with typeof is STRONGLY recommended for
	optimized result.

SEE ALSO
	language/types, kfun/typeof