[Insight-developers] help with template function problem

[Luis Ibanez]

 Hi Lydia,

 maybe adding an enum could
 help to wake VC++ up


 template<unsigned int VNumber>
 void tfunction( )
 {
   static enum { WakeUpVC = VNumber };

   unsigned int temp = WakeUpVC;
   std::cout << temp << std::endl;
 }



  Luis


-------------------
On Wed, 17 Oct 2001, Lydia Ng wrote:

> Hi,
>
> I am trying to interface between template world and non-template world.
> I have a problem with VC++ not being able to resolve
> a "unsigned int" template parameter. See code and results below.
>
> Does anyone know a fix/workaround to this for VC++?
>
> I also ran this test on Linux/gcc-2.96
> which doesn't have this problem.
>
> - Lydia
>
>
> =========Code=================================
> #include <iostream>
>
> template<unsigned int VNumber>
> void tfunction( )
> {
>   unsigned int temp = VNumber;
>   std::cout << temp << std::endl;
> }
>
> void function( unsigned int num )
> {
>
>   switch (num)
>     {
>     case 1:
>       tfunction<1>();
>       break;
>     case 2:
>       tfunction<2>();
>       break;
>     case 3:
>       tfunction<3>();
>       break;
>     case 4:
>       tfunction<4>();
>       break;
>     }
>
> }
>
>
> int main()
> {
>
>   for( unsigned int j = 1; j <= 4; j++ )
>     {
>     std::cout << "Following should be " << j << std::endl;
>     function(j);
>     }
>   return 0;
> }
>
> ===============VC++ results==========================
> Following should be 1
> 4
> Following should be 2
> 4
> Following should be 3
> 4
> Following should be 4
> 4
>
> ==============Linux/gcc 2.96 results=================
> Following should be 1
> 1
> Following should be 2
> 2
> Following should be 3
> 3
> Following should be 4
> 4
>
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>

-- 
Luis Ibanez                                      CB#:   7060
Research Assistan Professor                      phone: (919) 843 5436
Division of Neurosurgery                         fax:   (919) 966 6627
University of North Carolina at Chapel Hill      email: ibanez@cs.unc.edu
Chapel Hill, NC 27599-7060                       http://www.cs.unc.edu/~ibanez