[Insight-developers] typename

[chenting]

I found that for my SGI machine the typename should also be added when
there is ::
another problem is that when I compling the file itkImageMomentsTest.o
I found that
1. the complier says the class  itk::Image<unsigned short, 3U> has no
member SetSize, line 66
2. The compler no longer recognize the identifer cout and cerr in file
itkImageMomentsTest.cxx and itkImageMoments.txx

Bill Hoffman wrote:

> Hi all,
>
> The Microsoft compiler seems to be a bit lax on requiring the key word
> typename.    However, the SGI and gcc are not.  The basic rule to
> follow is this:
>
> If you have a template parameter or template derived parameter and
> you use :: on the type, then it needs typename.
>
> Here are some examples:
>
> template <class T, class TOutputImage>
> foo()
> {
>   T a;                     // OK
>   T::FooType b;            // ERROR
>   typename T::FooType;     // OK
>   T::Pointer p;            // ERROR
>   typename T::Pointer p;   // OK
>   typedef typename TOutputImage::ScalarValueType scalar;  // OK
>   typedef  TOutputImage::ScalarValueType scalar;          // ERROR
> }
>
> If the type is used more than once in a class, then a class scope
> typedef with the correct typename would be a good idea.
> (See itkMesh.h, you can see typename is only used with
> typedefs that have a :: in them.)
>
> -Bill
>
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