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// Copyright 2013 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.
// +build OMIT
package main
import "fmt"
func main() {
// START OMIT
type Node struct {
Next *Node
Value interface{}
}
var first *Node
visited := make(map[*Node]bool) // HL
for n := first; n != nil; n = n.Next {
if visited[n] { // HL
fmt.Println("cycle detected")
break
}
visited[n] = true // HL
fmt.Println(n.Value)
}
// END OMIT
}
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