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Date: Mon, 23 Jun 2014 17:40:27 +0200
From: "G.B." <rm-dash-bau-haus@dash.futureapps.de>
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Subject: Re: Cleanest Ada way to do this?
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Date: 2014-06-23T17:40:26+02:00
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On 23.06.14 13:48, Simon Clubley wrote:
> On 2014-06-23, Georg Bauhaus <rm-host.bauhaus@maps.futureapps.de> wrote:
>> On 23/06/14 08:46, hungupharps@gmail.com wrote:
>>> I've got a bitfield representing the LCD data lines and I'm trying then to write bits from a Character into it.
>>
>> If you know the size of the Character, 8 say, unchecked_conversion
>> seems possible, the target type being any 8-bit type that works,
>> e.g. a packed array of bits, or an Unsigned_8. The first offering
>> slices, the second providing for shifts and masks.
>>
>
> Wouldn't a better approach be to start with Character'Pos instead of a
> Unchecked_Conversion ?

Yes, if it is sufficient to use shifts and masks. The instructions
generated seem identical, at least when using GNAT on Intel.