[Caml-list] campp{4,5} and ppx

[Hendrik Boom <hendrik@topoi.pooq.com>]

On Mon, Oct 26, 2015 at 04:30:39PM +0100, Gabriel Scherer wrote:
> To my knowledge, nobody has contributed parsing of attributes and
> extensions (a change to the OCaml syntax whose use is central to many of
> the ppx extensions) to camlp4 or camlp5 (which implement their own OCaml
> parsers and thus need to be updated accordingly). It would not necessarily
> be too difficult to do so, but that means that currently you cannot combine
> camlp{4,5} and PPX extensions within the same source file.

Presumabbly ther qould be no problem if the camlp{4,5} and the PPX 
extensions were used in different source files?

> 
> There is another way to understand your question: if you have developed
> camlp{4,5} extensions, how hard is it to port them to ppx, or conversely to
> port a ppx extension to camlp{4,5}? My answer would be "rather easy",
> knowing that there are two separate aspects:

This invites another question:

How many of the things made available in camlp{4,5}, such as stream 
parsers, have been ported to ppx?

-- hendrik