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From: David Allsopp <dra-news@metastack.com>
To: immanuel litzroth <ilitzroth@gmail.com>,
	OCaML List Mailing <caml-list@inria.fr>
Subject: RE: [Caml-list] Raising invalid_argument with a constructed string.
Date: Mon, 28 Nov 2016 15:43:57 +0000	[thread overview]
Message-ID: <E51C5B015DBD1348A1D85763337FB6D90135535BB7@Remus.metastack.local> (raw)
In-Reply-To: <CAJjmLU4n0NVWzzCQ6-P+R1Neg0Er7gUQFJYNeHfLja7VbzEhAA@mail.gmail.com>

immanuel litzroth wrote:
> caml_invalid_argument(str) is no return and does not free it's 
> argument. 
> So calling it with a string constructed dynamically will mean it'll never 
> get freed.
> I could construct an ocaml string and pass that to caml_raise_with_arg,
> but I don't seem to be able to get to the caml_exn_Invalid_argument from
> c. Am I missing something?

Possibly - it's surprising that you want dynamic strings with an exception such as Invalid_argument which is never supposed to be caught and similarly with Failure where you shouldn't be matching on the string argument.

At a push, you can retrieve the Invalid_argument exception from caml_global_data (see byterun/fail.c), but that is essentially hacking the runtime to do so...


David

  reply	other threads:[~2016-11-28 15:44 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-28 14:39 immanuel litzroth
2016-11-28 15:43 ` David Allsopp [this message]
2016-11-28 15:50   ` Gabriel Scherer
2016-11-29 10:21     ` immanuel litzroth
2016-12-03 13:20 ` Richard W.M. Jones
2016-12-03 14:00   ` immanuel litzroth
2016-12-03 19:36     ` Richard W.M. Jones
2016-12-03 19:44       ` Gabriel Scherer

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