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// compile -G=3
// 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 Src1[T any] func() Src1[T]
func (s *Src1[T]) Next() {
*s = (*s)()
}
type Src2[T any] []func() Src2[T]
func (s Src2[T]) Next() {
_ = s[0]()
}
type Src3[T comparable] map[T]func() Src3[T]
func (s Src3[T]) Next() {
var a T
_ = s[a]()
}
type Src4[T any] chan func() T
func (s Src4[T]) Next() {
_ = (<-s)()
}
func main() {
var src1 Src1[int]
src1.Next()
var src2 Src2[int]
src2.Next()
var src3 Src3[string]
src3.Next()
var src4 Src4[int]
src4.Next()
}
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