From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Original-To: caml-list@sympa.inria.fr Delivered-To: caml-list@sympa.inria.fr Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by sympa.inria.fr (Postfix) with ESMTPS id 98FD07FC86 for ; Thu, 19 Mar 2015 01:30:06 +0100 (CET) Received-SPF: None (mail2-smtp-roc.national.inria.fr: no sender authenticity information available from domain of daniel.buenzli@erratique.ch) identity=pra; client-ip=74.55.86.74; receiver=mail2-smtp-roc.national.inria.fr; envelope-from="daniel.buenzli@erratique.ch"; x-sender="daniel.buenzli@erratique.ch"; x-conformance=sidf_compatible Received-SPF: None (mail2-smtp-roc.national.inria.fr: no sender authenticity information available from domain of daniel.buenzli@erratique.ch) identity=mailfrom; client-ip=74.55.86.74; receiver=mail2-smtp-roc.national.inria.fr; envelope-from="daniel.buenzli@erratique.ch"; x-sender="daniel.buenzli@erratique.ch"; x-conformance=sidf_compatible Received-SPF: None (mail2-smtp-roc.national.inria.fr: no sender authenticity information available from domain of postmaster@smtp.webfaction.com) identity=helo; client-ip=74.55.86.74; receiver=mail2-smtp-roc.national.inria.fr; envelope-from="daniel.buenzli@erratique.ch"; x-sender="postmaster@smtp.webfaction.com"; x-conformance=sidf_compatible X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0DFAACjFwpVm0pWN0pchz+zfJUBBASCJwEBAQEBAREBAQEBAQYLCwkULoQ5gQsCJgJJFhuIJwSiMY9MnAeBIZFWL4EWBaEmD40kgWcMAYIdgzEBAQE X-IPAS-Result: A0DFAACjFwpVm0pWN0pchz+zfJUBBASCJwEBAQEBAREBAQEBAQYLCwkULoQ5gQsCJgJJFhuIJwSiMY9MnAeBIZFWL4EWBaEmD40kgWcMAYIdgzEBAQE X-IronPort-AV: E=Sophos;i="5.11,426,1422918000"; d="scan'208";a="126652049" Received: from mail6.webfaction.com (HELO smtp.webfaction.com) ([74.55.86.74]) by mail2-smtp-roc.national.inria.fr with ESMTP; 19 Mar 2015 01:30:05 +0100 Received: from [172.20.10.2] (27.233.197.178.dynamic.wless.lssmb00p-cgnat.res.cust.swisscom.ch [178.197.233.27]) by smtp.webfaction.com (Postfix) with ESMTP id F10B320F327E for ; Thu, 19 Mar 2015 00:30:03 +0000 (UTC) Date: Thu, 19 Mar 2015 01:29:58 +0100 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Caml-list Message-ID: <2AB388B4D07D4DDABA30298A7C890319@erratique.ch> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Subject: [Caml-list] GADT existential escape Hello, Is it possible to escape a GADT existential using some kind of witness the same way a universal type would allow me ? I think the answer is no, but I'd love to be proven wrong. Best, Daniel