From: Florian Angeletti <octa@polychoron.fr>
To: caml-list@inria.fr
Subject: Re: [Caml-list] Returning printf from a function
Date: Thu, 23 Aug 2018 12:08:10 +0200 [thread overview]
Message-ID: <81f925d8-a5e0-2c6b-b2c7-a752e2db4135@polychoron.fr> (raw)
In-Reply-To: <20180823094826.xhc253lxxgt5la7a@annexia.org>
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A solution that works in this specific example and does not require to
rewire the logic is
to return the printing function inside a record with the right universal
quantification:
...
type debug = {fn: 'a. ('a, unit, string, unit) format4 -> 'a }[@@unboxed];;
let udebug = {fn=debug}
let give_fn () = Some udebug
...
| Some {fn} ->
fn "fn";
fn "fn param: %s" param
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next prev parent reply other threads:[~2018-08-23 10:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-23 9:15 Richard W.M. Jones
2018-08-23 9:28 ` Florian Angeletti
2018-08-23 9:48 ` Richard W.M. Jones
2018-08-23 10:08 ` Florian Angeletti [this message]
2018-08-23 10:23 ` Richard W.M. Jones
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