From: jeff.huter@bigfoot.com (Jeff)
Subject: Enum or Named Number
Date: 6 Apr 2004 10:30:08 -0700
Date: 2004-04-06T10:30:08-07:00 [thread overview]
Message-ID: <fe4bb2c2.0404060930.f932668@posting.google.com> (raw)
Looking for implementation advise. I'm writing a binding to some C
code that has several defined number macros (e.g. #define Viewable 1)
for states and flags. I would like to bitwise-or these numbers in Ada
which leads me to believe I should define these as named mod numbers
such as below:
type State is mod 2**Interfaces.C.Int'Size
State1 : constant State := 2#0001#
State2 : constant State := 2#0010#
State3 : constant State := 2#0100#
Any reason to define these as an Enum with a representation clause?
Seems like there would be more plumbing code. For example, I believe
that I would need to write my own bitwise-or function for the Enum.
Is the named number implementation the way to go, or is there a better
way?
next reply other threads:[~2004-04-06 17:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-06 17:30 Jeff [this message]
2004-04-06 17:49 ` Enum or Named Number Martin Dowie
2004-04-06 19:22 ` Randy Brukardt
2004-04-07 7:23 ` Martin Dowie
2004-04-07 9:34 ` Dmitry A. Kazakov
2004-04-13 13:29 ` Robert I. Eachus
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