Re: [boost] Fun, only handled by vc6/7!

From: David Abrahams (dave_at_[hidden])
Date: 2003-01-12 18:16:01

"Paul Mensonides" <pmenso57_at_[hidden]> writes:

> ----- Original Message -----
> From: "David Abrahams" <dave_at_[hidden]>
>
>> The latter.  It was just an experiment.  Fortunately, nothing I'm
>> doing depends very much on it.  It was prompted by the fact that
>> Borland 5.51 can handle enable_if, but not in a templated constructor:
>>
>> template <class T>
>> struct X
>> {
>>     template <class U>
>>     X(X<U> const&, typename enable_if<some_property_of<U>::value,
> int*>::type = 0);
>          ^
> It chokes here?  

Sorry, no.  I mean the 2nd '<' in that line.

> Is it legal to use the template parameter 'U' in a non-deduced
> context like that?  I'm curious because I thought that it wasn't
> (though I could be wrong).

Why do you say that's non-deduced? Up to the point of enable_if, it's
standard stuff; that's how shared_ptr conversion works.

-- 
                       David Abrahams
   dave_at_[hidden] * http://www.boost-consulting.com
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