[Cfp-interest 1651] Re: C++ floating-point work

[Jim Thomas]

> On Jun 17, 2020, at 8:15 AM, Steve (Numerics) Canon <scanon at apple.com> wrote:
> 
>> On Jun 17, 2020, at 11:01 AM, Fred J. Tydeman <tydeman at tybor.com <mailto:tydeman at tybor.com>> wrote:
>> 
>>> What does the C standard have to say about conversions between binary and decimal arithmetic types?  If I remember correctly, the usual arithmetic conversions don't allow them to be mixed during arithmetic, saying it is undefined behavior. 
>> 
>> Correct.
> 
> The arithmetic operator definitions make this a constraint, so mixing them in an arithmetic expression is not UB; a diagnostic is required.
> 
> (I do not see this constraint for assignment, which means we also don’t have it for function calls, unless I’m forgetting something. Is that intended?)

Yes, the assignment behavior (no constraint) is intended for functions calls.

- JIm

> 
> – Steve
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