What is Go's Equivalent to C's Void Pointers?

Go's Equivalent of Void Pointers in C

To create a data structure that can contain any type in Go, consider utilizing the empty interface.

The Empty Interface: interface{}

According to the Go Programming Language Specification, "all types implement the empty interface." This means that you can define a variable of type interface{} and assign it a value of any non-interface type.

var value interface{} = 10

This functionality allows you to create data structures that can store values of any type, similar to void pointers in C. For example, you could define a linked list where each node can contain a value of any type:

type Node struct {
    Value interface{}
    Next  *Node
}

Update: any Alias

Starting in Go 1.18, the builtin alias any was introduced as a synonym for interface{}. It provides a more concise and descriptive name for the empty interface.

var value any = 10

Conclusion

By utilizing the empty interface or its alias any, you can create Go data structures capable of storing values of any type, achieving functionality similar to void pointers in C.

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