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Help with macro substitution

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I've got a problem with #define macro substitution. Currently I have something like this:
#define DEFINE_FUNC(name, params, paramDecl)                                              void name##paramDecl                         {                                                                                         }                                            
DEFINE_FUNC(someFunction, (a, b), (int a, int b))

Then obviously this would create the following function:
void someFunction(int a, int b)


The problem is that I also want to define a template inside of the DEFINE_FUNC macro. Such as: template <typename T, typename A, typename B> But I want to pass the string ", typename A, typename B" to the macro as a single parameter. Hence DEFINE_FUNC(name, params, paramDecl, x), where x = ", typename A, typename B". Is there a way to do this?

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