Re: [Caml-list] META file standards for ppx extensions

[Gerd Stolpmann <info@gerd-stolpmann.de>]

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Am Donnerstag, den 09.04.2015, 17:28 +0100 schrieb Dario Teixeira:
> Hi,
> 
> > How do you compose ppx extensions using META? Can you require
> > "barloot.ppx"? The camlp4 "syntax" packages are usual ocaml
> > libraries, so the rules of composition are (almost) clear.
> > How does it work when you want to compose ppx rewriters?
> 
> Gerd can provide a more authoritative answer, but I reckon
> ocamlfind is smart enough to handle such cases.  You can
> already require a sub-package after all, and involving ppx
> should not change this.

As ppx rewriters are commands, and as you can specify the -ppx option
several times to invoke several commands, the answer should be as clear
as for the library case: The commands are just run one after the other,
and if there is a dependency "ppx1 requires ppx2", the command for ppx2
is run first.

Gerd
-- 
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Gerd Stolpmann, Darmstadt, Germany    gerd@gerd-stolpmann.de
My OCaml site:          http://www.camlcity.org
Contact details:        http://www.camlcity.org/contact.html
Company homepage:       http://www.gerd-stolpmann.de
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