Ian Lance Taylor wrote:
> Mark, in PR c++/11987 you added a comment saying that it was a
> regression.  But the more I look at it, the less I understand it.
> 
> The test case is:
> 
> ==================================================
> template <int dim> struct X { 
>     struct I { I(); }; 
> }; 
>  
> template <int dim> struct Y : X<dim> { 
>     typedef typename X<dim>::I I; 
> }; 
>  
> template <int dim> 
> Y<dim>::I::I () {}  // note: I is nested type in X, not Y! 
>  
> template struct Y<1>;
> ==================================================
> 
> g++ currently accepts this test case.  The PR says that this test case
> is invalid, and should be rejected.  But I can't figure out why.

I forget the chapter-and-verse, but the point is that I is nested in X,
and so to *define* its constructor (as opposed to refer to it), you have
to say X<dim>::I::I().

-- 
Mark Mitchell
CodeSourcery, LLC
[EMAIL PROTECTED]
(916) 791-8304

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