Hi there,

let's assume I have a structure which takes 5 ints as template parameters.

template< int NumChannel
       , int FirstChannelBits  = 0
       , int SecondChannelBits = 0
       , int ThirdChannelBits  = 0
       , int FourthChannelBits = 0
       , int FifthChannelBits  = 0
       >
struct pixel_type_generator { /* omitted*/ }

The first parameter is different as it defines how many of the other
parameters are actually used.

How can I use boost::preprocessor to get this kind of code repetition: