[Cfp-interest] AI about C support for "snan" character sequences

[Mike Cowlishaw]

    All: Consider the fact that C doesn't support the SNaN sequence that
IEEE does. Can have strtod take it as input.
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IEEE 754 5.12.1 says 


Conversion of an external character sequence "snan" (regardless of case)
with an optional preceding sign, to a supported format should either produce
a signaling NaN or else produce a quiet NaN and signal the invalid operation
exception.


I think as written it is a recommendation to do one or the other, but not a
requirement to do either. Is this what the 754 committee intended? 
 

I believe it was ...that's the first use of Should in that subclause.
 
Mike
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