How Can I Use Type Parameters in Go Generic Interface Methods?

Generic Interface Method Type Parameters

In Go generics, methods cannot directly have their own type parameters. However, they can utilize type parameters defined at the interface or struct level.

To solve the compilation error, define the generic type parameter on the interface type itself:

type Iterator[T any] interface {
    ForEachRemaining(action func(T) error) error
}

Within the interface body, you can then use the T type parameter just like any other type:

type Iterator[T any] interface {
    ForEachRemaining(action func(T) error) error
    // other methods
}

This enables you to create generic methods that operate on specific data types while adhering to the constraints of the Go generics design.

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