Re: [Caml-list] record update-apply

[Yaron Minsky <yminsky@janestreet.com>]

Fieldslib uses camlp4, but basically gets the job done.  A Field.t is
more or less a lens (you can write a simple function that constructs a
lens from a Field.t), so that gives you the basic bits you need.
We're going to do a ppx rewrite soon.

y

On Wed, Jan 28, 2015 at 4:51 PM, Nick Lucaroni
<nicholas.r.lucaroni@gmail.com> wrote:
> This is really the update function of a lens. Anil has taken a part of a
> project that had contained a lens package into its own library,
> https://github.com/avsm/ocaml-lens . Although a ppx library with lenses
> would be most appropriate (since this is all still manual).
>
>
>
> --
> Nicholas Lucaroni
>
>
> On Wed, Jan 28, 2015 at 12:03 PM, Christoph Höger
> <christoph.hoeger@tu-berlin.de> wrote:
>>
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>> Dear all,
>>
>> I often find myself writing code like this
>>
>> {foo with bar = f foo.bar}
>>
>> and would like to avoid the redundancy of typing 'bar'. So it would be
>> very convenient to have an applied-to operator:
>>
>> {foo with bar <- f}
>>
>> This would only need one additional syntactic sort at the very first
>> stage, since the operator can immediately be de-sugared into the
>> already-existing with-form.
>>
>> What do you think?
>>
>>
>> - --
>> Christoph Höger
>>
>> Technische Universität Berlin
>> Fakultät IV - Elektrotechnik und Informatik
>> Übersetzerbau und Programmiersprachen
>>
>> Sekr. TEL12-2, Ernst-Reuter-Platz 7, 10587 Berlin
>>
>> Tel.: +49 (30) 314-24890
>> E-Mail: christoph.hoeger@tu-berlin.de
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>> --
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>