Why value stored in an interface is not addressable in Golang

Question

Citing the golang wiki (https://github.com/golang/go/wiki/MethodSets#interfaces):

\"The concrete value stored in an interface is not addressable, in the same way, th

Answer 1

Helpful info in go doc:https://golang.org/doc/faq#different_method_sets

Even in cases where the compiler could take the address of a value to pass to the method, if the method modifies the value the changes will be lost in the caller. As an example, if the Write method of bytes.Buffer used a value receiver rather than a pointer, this code:

var buf bytes.Buffer
io.Copy(buf, os.Stdin)

would copy standard input into a copy of buf, not into buf itself. This is almost never the desired behavior.