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Date: Sun, 17 Aug 2014 18:48:17 -0400
From: Peter Chapin <PChapin@vtc.vsc.edu>
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Subject: Re: Interfacing enums with C
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Xref: news.eternal-september.org comp.lang.ada:21801
Date: 2014-08-17T18:48:17-04:00
List-Id: <comp.lang.ada>

On 2014-08-17 15:48, Victor Porton wrote:

>> http://www.ada-auth.org/standards/12rm/html/RM-B-1.html 14/3 - 18
>> does not say that enumeration types are eligible for convention C.
>>
>> So, in my opinion, RM does not require the following code to be
>> compilable:
>>
>>    type Option_Type is (A, B)
>>       with Convention => C;
>>
>>> And your first interfacing convention is much better. IMO.
> 
> BTW, I could propose enumeration type to be eligible for Convention C in the 
> next version of Ada RM!

FWIW, GNAT does allow 'Convention => C' for enumeration types. So
Simon's suggestion should work with GNAT if you are willing to make use
of a GNAT extension.

Peter