// run | |
// Copyright 2021 The Go Authors. All rights reserved. | |
// Use of this source code is governed by a BSD-style | |
// license that can be found in the LICENSE file. | |
package main | |
type Iterator[T any] interface { | |
Iterate() | |
} | |
type IteratorFunc[T any] func(fn func(T) bool) | |
func (f IteratorFunc[T]) Iterate() { | |
} | |
func FromIterator[T any](it Iterator[T]) { | |
it.Iterate() | |
} | |
func Foo[T, R any]() { | |
FromIterator[R](IteratorFunc[R](nil)) | |
} | |
func main() { | |
Foo[int, int]() | |
} |