You can't avoid allocating using the same techniques as in C++. In Go you have to know the intricacies of escape analysis to avoid allocation: objects are heap allocated "by default" and sometimes optimized to be stack allocated. In C++ there is no implicit heap allocation and usually no need for escape analysis.

As a practical example, capturing variables in a closure will usually cause them to be heap allocated in Go, but in C++ capturing has no effect on variable storage.