Re: GtkArg typesafety

On Tue, Jan 04, 2000 at 12:02:05PM -0500, Havoc Pennington wrote:
> IMO this is much extra complexity for very little gain (it avoids the
> "0" is not a double problem, but that's all really; it doesn't solve
> the problem of passing entirely the wrong type or getting const-ness
> wrong). And it ruins the nice syntax which is 85% of the point of
> arguments.

Ok, added full type safety, so with this, using args is just as type safe as a
normal function call.

#ifdef __GNUC__
#define MY_PERSON_ARG_NAME(arg)    	"name",({char *z = (arg); z;})
#define MY_PERSON_GET_ARG_NAME(arg)	"name",({char **z = (arg); z;})
#define MY_PERSON_ARG_DOB(arg)    	"dob",({glong z = (arg); z;})
#define MY_PERSON_GET_ARG_DOB(arg)	"dob",({glong *z = (arg); z;})
#define MY_PERSON_ARG_DOD(arg)    	"dod",({glong z = (arg); z;})
#define MY_PERSON_GET_ARG_DOD(arg)	"dod",({glong *z = (arg); z;})
#else /* __GNUC__ */
#define MY_PERSON_ARG_NAME(arg)    	"name",(char *)(arg)
#define MY_PERSON_GET_ARG_NAME(arg)	"name",(char **)(arg)
#define MY_PERSON_ARG_DOB(arg)    	"dob",(glong )(arg)
#define MY_PERSON_GET_ARG_DOB(arg)	"dob",(glong *)(arg)
#define MY_PERSON_ARG_DOD(arg)    	"dod",(glong )(arg)
#define MY_PERSON_GET_ARG_DOD(arg)	"dod",(glong *)(arg)
#endif /* __GNUC__ */

This not only casts, but gives a warning even on wrong pointer types.  I'm
really starting to like GNU C extentions.


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