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How can I generate an AST?
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Date: 2007-08-20 (13:24)
From: Loup Vaillant <loup.vaillant@g...>
Subject: Re: [Caml-list] How can I generate an AST?
2007/8/20, Daniel de Rauglaudre <daniel.de_rauglaudre@inria.fr>:
> On Mon, Aug 20, 2007 at 10:22:17AM +0200, Loup Vaillant wrote:
> > This may be a better approach. However, I am not eager to use camlp*,
> > for it will introduce a additional dependency. I may choose this
> > however, if the camlp* AST is simpler than the Ocaml AST. Where can I
> > find it?
> Solution using camlp5:
> [...]
>  But, well, you need to know camlp5, understand the quotation system,
>  perhaps the revised syntax too, in one word, read the doc, and I can
>  understand that if you did not use camlp5 before, it is some work...

Indeed. I didn't work with camlp* before, so the learning curve may be
a problem, I don't know.

> Other solution not using camlp*:
>  Read the ocaml sources, file "parsing/parser.mly" to understand how
>  the ocaml syntax tree works. Program your parser to generate this
>  syntax tree.

I have already read "parsing/parstree.mli", so I assume half the work
is done! (well, I hope so, for I don't know .mly files...)

> Once done, to give your syntax tree directly to the
>  ocaml compiler, output:
>  1/ the magic number you can find in ocaml sources at utils/config.ml
>       - ast_impl_magic_number for an implementation
>         ast_intf_magic_number for an interface
>  2/ your input file name
>  3/ your syntax tree in binary with "output_value"

That, is what I need. Thank you. I'll notify the list once I managed
to produce some output.

I have still one problem, though : how should I access this code? It
is not part of the standard library, so I can't just "open Config;;".
I can't hard-copy this code, either, that is too ugly. Maybe there is
a way to install a "development package" of Ocaml so I can link it?