Re: Binding for gtkSourceView-2.0

Mike Spivey wrote:
> (1) Is there a fixed rule for what methods take () as a final parameter?
>  Methods with side effects and no arguments, yes; but what about methods
> like
> 
> 	method guess_language :
> 	  ?filename:string -> ?content_type:string
> 	    -> unit -> source_language (* or raise Not_found *)
> 
> that have no side-effects and only optional arguments?
> 
Yes on methods with only optional parameters.  Unless there's a
non-optional parameter, uses without arguments could be partial.
General rule: use () as final parameter when necessary - when you need
to be able to force non-partial application.

> (2) On the same example: if a C method with type t may return NULL, then
> we have multiple possibilities in OCaml:
> 
> 	(i)   return "t option"
> 	(ii)  return "t", but raise Not_found if the result is NULL
> 	(iii) if t = string, then return the empty string for NULL
> 
> A similar question applies to arguments that may be NULL.  Is there a
> rule that I should follow?
> 
Depends on whether returning NULL is really exceptional, but probably
not (iii), unless the empty string really is meant by a NULL response.

E.