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From: Florian Weimer <fw@deneb.enyo.de>
Newsgroups: comp.lang.ada
Subject: Re: ISO/IEC 14519 - Ada POSIX binding
Date: Sat, 21 Jun 2003 21:14:12 +0200
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tmoran@acm.org writes:

>   I have the paper version of IEEE 1003.5-1992 which specifically has a
> discussion of why that Ada binding to POSIX uses exception handling
> instead of errno.

Even with Ada 83, they should have used an errno-like variable and a
single exception.  (In Ada 95, you can encode the error code in the
exception message.)  The long exception list results in lots of "when
others =>" clauses silently discarding the exception if you want to
have reliable code which runs on real-world systems.