questionnaire
Keith Duddy
keithd at anvil.oz
Tue Jan 23 14:15:17 AEST 1990
rick_jones at f616.n713.fido.oz (Rick Jones) writes:
> pA>4. Do you consider passing a "pointer to a function" to another
> pA>function
> pA> which will (blindly?) use it to call that function, a "kosher"
> pA> programming practice?
>I don't know about blindly, but yes I have quite a few programs that do that.
>particularly my format() module that does all the work for printf, fprintf,
>lprintf, etc. is called with the pointer to an output function, allowing one
>function to perform multiple roles.
In fact this is the way in which one implements generics in C. If you are
storing some generic data type in a module then you must pass in a function
sometimes to do comparisons/retrievals etc. As long as the interface and
intention of the function is clearly defined then there is no problem. (look
at the qsort/bsearch standard libraries).
_______________________________________________________________________
__ | keithd at anvil.oz.au
/_/ __ o _/ /_ / ) __/ __/ | (07)870 4999
/ \ (-' ( ( / / o /_ ' (_( (_/ (_/ (__/ o | Anvil Designs Pty Ltd
Don't be stupid Niel, everybody / | PO Box 954, Toowong,
knows potatoes can't fart. (_/ | 4066, Australia.
[Disclaimer: Anvil Designs Pty Ltd actually encourage creative thought -
but they don't want to be involved with creative litigation.]
More information about the Comp.lang.c
mailing list