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NNTP-Posting-Date: Fri, 21 Jul 2006 14:45:04 -0500
From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: Re: How do you bitwise operations in Ada '83 and '95
References: <m2bqrihj0j.fsf@grendel.local>
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Date: 2006-07-21T14:45:05-05:00
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> Seriously, the C
>
>   field = (longword >> 15) & 0x3f;
>
> is pretty clear.
Not as clear, and more error prone than
    field := soccer_schedule.location;
Not to mention that "field" could be of type "soccer_field_ids" in Ada,
thus allowing the compiler to check that you aren't assigning the hour of
the game to the variable "field", rather than of type "Unsigned_96" which
prevents the compiler from helping you guard against error.