[cfe-commits] r60331 - /cfe/trunk/test/Sema/i-c-e3.c
neil at daikokuya.co.uk
Tue Dec 2 05:27:17 PST 2008
Anders Carlsson wrote:-
>>> Ah, I see - I got ICEs and regular constant expressions mixed up.
>> The 'a' is not permitted in a "regular constant expression" either.
> Hmm, why not?
No, wrong question, it should be "what right does it have to be?" :)
6.6p7 states the semantics of constant expressions in initializers,
of which this is one. It is none of the four because of the "a".
This is only semantics, not a constraint, so an implementation
can accept other stuff as extensions, but I don't believe you were
By the flip side of the coin, your expression doesn't violate a
constraint, but nor does it follow the semantics of the language,
so a conforming implementation has no requirement to accept your
expression. Many don't.
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