Go的接口{}与C中的void *相同吗？

Question

Since a variable of type interface{} can have any value, does that mean it is essentially a general pointer like a void* in C?

Answer 1

While C's void * pointers and Go's interface{} variables share the property that you can store arbitrary types, there is one big difference: Go interface variables also store the type of the value they hold.

So while a C programmer is expected to make sure that any casts from void * pointers to specific types are safe, the Go runtime can check that any type assertions are correct.

The type information found in interface variables also allows for sophisticated runtime introspection through the reflect package, which would be impossible with a plain void * pointer.