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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: AI12-0218: What is the portable representation clause for
 processing IETF packets on little-endian machines?
Date: Fri, 11 May 2018 14:49:44 +0100
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Date: 2018-05-11T14:49:44+01:00
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Lucretia <laguest9000@googlemail.com> writes:

> On Friday, 11 May 2018 08:55:28 UTC+1, Simon Wright  wrote:
>> In the body,
>> 
>>    Big_Endian : constant Boolean
>>      := System."=" (System.Default_Bit_Order, System.High_Order_First);
>> 
>
> Is it not possible to use derived types with different rep clauses to
> implement byte swapping on assignment, like the pack/unpack trick can?

Maybe nowadays; not when that code was written.