Re: [Caml-list] Smells like duck-typing

[skaller <skaller@users.sourceforge.net>]

On Wed, 2007-10-17 at 16:13 +0100, Dario Teixeira wrote:
> > I would use something weaker, and I wouldn't use objects
> > either. To me, this is essentially a dynamic scenario,
> > so the data type should be dynamic. For example:
> > 
> > 	type field_t = [
> > 	| `Title of string
> > 	| `Intro of string
> > 	| `Body of string
> > 	| `Field of string * string
> > 	]
> > 
> > 	type story_t = field_t list
> > 
> 
> Hi,
> 
> Interesting idea, but how would you access the fields in a convenient
> manner?  

let rec get_title ls = match ls with
| `Title s :: _ -> s
| _ ::t -> get_title t
| [] -> raise Not_found (* sucks.. *)


-- 
John Skaller <skaller at users dot sf dot net>
Felix, successor to C++: http://felix.sf.net