Question

how would i define a function ptr which points to a function which gives back a boolean but takes two unknown (but equal) types as arguments?

Should be something like this, but my IDE marks this as wrong:

template<class arg>
bool (ptr*)(arg,arg);

I also want to combine this with a function which takes such a function-ptr to compare two arguments it gets.

like:

template<class arg>
void function(arg one,arg two,ptr comparefunction)

Is something like this even possible?

Answer 1

You can’t have template typedefs, which seems to be what you’re asking about initially. For the function which takes a function pointer you can do:

template<class arg>
void function(arg one,arg two,bool (*comparefunction)(arg,arg))

instead.

Your initial syntax is also wrong:

bool (*ptr)(arg,arg); // * goes before the name