From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,e9247d4ba8198ede
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news4.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local02.nntp.dca.giganews.com!nntp.comcast.com!news.comcast.com.POSTED!not-for-mail
NNTP-Posting-Date: Wed, 26 Jul 2006 13:25:41 -0500
From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: Re: Actual stream of a certain type
References: <mailman.0.1153934868.32700.comp.lang.ada@ada-france.org>
X-Newsreader: Tom's custom newsreader
Message-ID: <yoqdnX8teKA4LlrZnZ2dnUVZ_rWdnZ2d@comcast.com>
Date: Wed, 26 Jul 2006 13:25:41 -0500
NNTP-Posting-Host: 67.164.83.70
X-Trace: 
 sv3-ZGAi7EYh/TQ1x3V/HAzmnFIidFMsq7n8CwyKe14rMtDt/7V35+47U6oyikol0bMJlpQrw5fmx62t2Vz!Ns2p4yI1YcXlvH4XkbxL/0vfo2D+22H6vpkM+feIlDNT9iTvEyCDkqysyVQyaC5IalrRVbgYBsCM!sOXQ2K3AXZ4wWg==
X-Complaints-To: abuse@comcast.net
X-DMCA-Complaints-To: dmca@comcast.net
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint
 properly
X-Postfilter: 1.3.32
Xref: g2news2.google.com comp.lang.ada:5946
Date: 2006-07-26T13:25:41-05:00
List-Id: <comp.lang.ada>

> I want to write a library that exports a type T whose stream
> operations 'Write and 'Read require that the actual stream be of a
> certain type, also provided by the library, and visible and usable in
   You can write your own 'Read and 'Write for T and within those check
if not Stream.all in T_Kind_of_Stream then raise ...