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object ptr as template parameter
From: |
Michael D. Berger & Rosalie A. Clavez |
Subject: |
object ptr as template parameter |
Date: |
Tue, 28 May 2002 13:59:17 -0400 |
Using gcc 2.95.3-5(in Cygwin), I would have expected the following attempt to
pass a class pointer through a template parameter to work. It fails,
as indicated below. Anyone know why?
Thanks for your advice,
Mike.
--
In external space:
MyAlloc myAlloc;
main()
{
ArrayAllocBridge<int,MyAlloc,&myAlloc> bridge;
}
In another included file:
template<class TYP,class ALLOC,ALLOC* ALC=0>
class ArrayAllocBridge
{
public:
ArrayAllocBridge();
...
private:
ALLOC* allocator_;
...
};
template<class TYP,class ALLOC,ALLOC* ALC>
ArrayAllocBridge<TYP,ALLOC,ALLOC*>::
ArrayAllocBridge()
{
allocator_ = ALC;
}
Here is the diagnostic:
ArrayAlloc.ii:215: type/value mismatch at argument 3 in template parameter
list for `template <class TYP, class ALLOC, ALLOC * ALC = 0>
ArrayAllocBridge<TYP,ALLOC,ALC>'
../MdbUtil/ArrayAlloc.ii:215: expected a constant of type `ALLOC *',
got `ALLOC *'
--
Michael D. Berger
Rosalie A. Clavez
m.d.berger@ieee.org
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