c++ generic programming with templates and nullptr -

let's have generic function:

template<typename t> void foo(t data) {   if(data == nullptr)    return;   //... }

the problem can not write that. if t primitive type or object passed value, can not compare nullptr.

on other hand, if t pointer int? able compare nullptr.

is there way?

as @j_random_hacker suggested, overload foo() function. way have 2 differents behaviour depending of type pass foo()

template<typename t> void foo(t *data) {   if(data == nullptr)     return;   //... }  template<typename t> void foo(t data) {   //... }

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