Eike,
Eike Rathke wrote:
> Hi Patrick,
>
> On Saturday, 2009-12-19 16:06:35 -0500, Patrick Durusau wrote:
>
>
>> Just so I remember to capture it, under the various bit operators, not
>> that there is a portability constraint but then under semantics, an
>> implementation must support at least up to 48 bits. No mention of
>> portability.
>>
>
> There are portable constraints 0 <= x < 2^48
>
>
>> (Yes, I will change "implementation" but this sounds like, looks like,
>> walks like a constraint on evaluators and not on expressions.
>>
>
> It is a constraint of the expression to be portable, an evaluator shall
> support at least 48 bits.
>
>
You mean that in order to support the portability of a certain class of
expressions, evaluators are constrained to support a minimal set of values.
Sure, there is an interaction between the constraints on the capacities
of evaluators and constraints/guidance on expressions that result in
their being "portable."
Hope you are at the start of a great day!
Patrick
--
Patrick Durusau
Chair, V1 - US TAG to JTC 1/SC 34
Convener, JTC 1/SC 34/WG 3 (Topic Maps)
Editor, OpenDocument Format TC (OASIS), Project Editor ISO/IEC 26300
Co-Editor, ISO/IEC 13250-1, 13250-5 (Topic Maps)
