golang 例外规则 "interface pointer can't implement interface"
golang exception to rule "interface pointer can't implement interface"
在golang.org的官方FAQ中，under pointers有这样一句话：
"The insight is that although a pointer to a concrete type can satisfy an interface, with one exception a pointer to an interface can never satisfy an interface"
出于好奇，上述规则的例外是什么？
即接口指针什么时候可以实现接口？
就在它下面说：
The one exception is that any value, even a pointer to an interface,
can be assigned to a variable of empty interface type (interface{}).
Even so, it's almost certainly a mistake if the value is a pointer to
an interface; the result can be confusing.
在golang.org的官方FAQ中，under pointers有这样一句话： "The insight is that although a pointer to a concrete type can satisfy an interface, with one exception a pointer to an interface can never satisfy an interface"
出于好奇，上述规则的例外是什么？ 即接口指针什么时候可以实现接口？
就在它下面说：
The one exception is that any value, even a pointer to an interface, can be assigned to a variable of empty interface type (interface{}). Even so, it's almost certainly a mistake if the value is a pointer to an interface; the result can be confusing.