[Insight-users] Template question

[Luis Ibanez]

Hi Bill

The line:

       MetricType::Pointer    metric = MetricType::New();

should probably be:

       typename   MetricType::Pointer  metric = MetricType::New();


When you refer to traits of templates inside another
templated class, you need to add the "typename" keyword.



     Regards,


          Luis


--------------------------
Poirier, Guillaume wrote:
> 
> This is probably a simple question... I am trying to do the following:
> 
> template <typename PixelFormat=unsigned char, unsigned int Dimension=2 >
> class Foo : public Foo2
> {
>   [...]
> 
>   inline void func();
> };
> 
> template <typename PixelFormat, unsigned int Dimension>
> void Foo<PixelFormat, Dimension>::func()
> { 
>   typedef itk::Image< PixelFormat, Dimension >  FixedImageType;
>   typedef itk::Image< PixelFormat, Dimension >  MovingImageType;
>  
>   typedef itk::TranslationTransform< double, Dimension > TransformType;
>   typedef itk::RegularStepGradientDescentOptimizer       OptimizerType;
>   typedef itk::MattesMutualInformationImageToImageMetric<FixedImageType, 
> MovingImageType>   MetricType;
>  
>   typedef itk::LinearInterpolateImageFunction< MovingImageType, double > 
> InterpolatorType;
>   typedef itk::ImageRegistrationMethod< FixedImageType, MovingImageType 
>  > RegistrationType;
>  
>   MetricType::Pointer         metric        = MetricType::New();
> 
>   [...]
> }
> 
> g++ complains of error: expected `;' before ‘metric’. If I replace 
> PixelFormat by float and Dimension by 2
> then it compiles... Sorry, I am not extremely familiar with templates 
> and not sure what I am doing wrong :(
> 
> 
> -bill
> 
> 
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