Runtime enum-to-type mapping

Both Matlab array mxArray and OpenCV’s Mat can hold data any basic type.  I want to write code which essentially can handle any data type. My current solution is to write template based code for data processing.  I call this code with a switch/case statement. I wanted to avoid rewriting this switch/case for each function that I write.  I was hoping that there was a better way of doing this. My friend posted this for me on stackoverflow.

mxClassID category = mxGetClassID(prhs[0]);
switch (category) {
      case mxINT8_CLASS: computecost<signed char>(T,offT,Offset,CostMatrix); break;
      case mxUINT8_CLASS: computecost<unsigned char>(T,offT,Offset,CostMatrix); break;
      case mxINT16_CLASS: computecost<signed short>(T,offT,Offset,CostMatrix); break;
      case mxUINT16_CLASS: computecost<unsigned short>(T,offT,Offset,CostMatrix); break;
      case mxINT32_CLASS: computecost<signed int>(T,offT,Offset,CostMatrix); break;
      case mxSINGLE_CLASS: computecost<float>(T,offT,Offset,CostMatrix); break;
      case mxDOUBLE_CLASS: computecost<double>(T,offT,Offset,CostMatrix); break;
      default:
}

http://stackoverflow.com/q/7356740 

The details I missed on the stackoverflow question were I plan to call the this function template only at once. However, I have multiple functions which will need this switch case structure. This makes the function table based methods useless and I don’t really want to use macros. So, it seems like there is now way of getting rid of the switch/case.