Re: [Caml-list] ANN: BER MetaOCaml N104, for OCaml 4.04.0

[Eray Ozkural <examachine@gmail.com>]

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This sounds far better than a minor improvement, for many macro-like apps
this would be a major roadblock as there is a big performance gap in
interpreted and compiled code in ocaml. Could be a game changer.
Congratulations Oleg!

Best,

Eray

On Sun, Jan 1, 2017 at 6:20 PM, Oleg <oleg@okmij.org> wrote:

>
> BER MetaOCaml N104 is a strict superset of OCaml 4.04.0 for ``writing
> programs that generate programs''.  BER MetaOCaml adds to OCaml the
> type of code values (denoting ``program code'', or future-stage
> computations), and two basic constructs to build them:
> quoting and splicing. The generated code can be printed, stored in a
> file -- or compiled and linked-back to the running program, thus
> implementing run-time code optimization. A well-typed BER MetaOCaml
> program generates only well-scoped and well-typed programs:
> The generated code shall compile without type errors.
> Staging-annotation-free BER MetaOCaml is identical to
> OCaml; BER MetaOCaml can link to any OCaml-compiled library (and
> vice versa); findlib and other tools can be used with BER MetaOCaml as
> they are, in their binary form.
>
> BER MetaOCaml N104 comes with one minor and two notable improvements.
> The minor improvement is the availability of the native MetaOCaml.  If
> the generator is compiled in native mode (using metaocamlopt), the
> dynamically generated and run code will be natively-compiled as
> well. The lack of native mode was the most frequently heard criticism
> of MetaOCaml, although in my experience it hardly even
> matters. Off-line code specialization seems to be far more prevalent
> and useful than online one. Anyway, here we have it.
>
> The notable new features -- not seen in MetaOCaml (or MetaML, for that
> matter) -- are generating pattern-matching expression with the
> statically unknown number of clauses, and let-insertion as a
> primitive. To wit, |genlet exp| inserts  |let freshname = exp in ...|
> somewhere in the generated code and returns |.<freshname>.| (unless |exp|
> is already syntactically a value such as a variable reference).
> The let-statement is inserted at the most appropriate place.
>
> BER MetaOCaml N104 should be available though OPAM, hopefully soon.
> In the meanwhile, it is available as a set of patches to the
> OCaml 4.04.0 distribution.
>         http://okmij.org/ftp/ML/ber-metaocaml-104.tar.gz
> See the INSTALL document in that archive. You need the source
> distribution of OCaml 4.04.0, see the following URL for details.
>
> For more explanations, please see
>         http://okmij.org/ftp/ML/MetaOCaml.html
> as well as ChangeLog and NOTES.txt in the BER MetaOCaml distribution.
>
>
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>



-- 
Eray Ozkural, PhD. Computer Scientist
Founder, Gok Us Sibernetik Ar&Ge Ltd.
http://groups.yahoo.com/group/ai-philosophy

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