[C++ Patch] PR 39970

[Paolo Carlini]

On 04/25/2012 01:41 AM, Jason Merrill wrote:
> On 04/24/2012 05:24 PM, Paolo Carlini wrote:
>>> Perhaps we aren't checking default arguments unless they're actually
>>> used; a could change that if they aren't dependent.
>>>
>> Your reply reached the mailing list a bit mangled, could you please
>> clarify?
>
> If the default argument isn't dependent on other template parameters, 
> we can check immediately whether it is a suitable template argument 
> for its parameter, including being a constant expression.  That ought 
> to give an appropriate diagnostic for this testcase.
Ok, thanks, I''ll see what I can do.

Paolo.