Re: [Caml-list] Camlp4 with traditional syntax (was: Camlp4 documentation)

[Richard Jones <rich@annexia.org>]

On Tue, Feb 22, 2005 at 11:29:00AM +0100, Oliver Bandel wrote:
> So, if the indended doc on Camlp4 would
> explain in detail what it is good for, what it
> provides and how to use it, I (and IMHO many others)
> would gain a lot of such a documentation/tutorial.

I too am eagerly awaiting a good tutorial on Camlp4.  I've done a few
things using Camlp4, and for me the syntax seems to be needlessly
obscure.  For example, here's how to write an infix 'map_with'
operator, the syntax being: 'list map_with f' which is equivalent to
'List.map f list':

open Pcaml

EXTEND
   expr: AFTER "apply"
   [ LEFTA
       [ e1 = expr; "map_with"; e2 = expr ->
           <:expr< List.map $e2$ $e1$ >>
       ]
   ];
END

Rich.

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Richard Jones, CTO Merjis Ltd.
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