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73 lines
1.1 KiB
73 lines
1.1 KiB
4 months ago
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// run
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test general operation using a list implementation.
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package main
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type Item interface {
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Print() string
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}
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type ListItem struct {
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item Item
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next *ListItem
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}
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type List struct {
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head *ListItem
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}
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func (list *List) Init() {
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list.head = nil
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}
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func (list *List) Insert(i Item) {
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item := new(ListItem)
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item.item = i
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item.next = list.head
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list.head = item
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}
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func (list *List) Print() string {
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r := ""
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i := list.head
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for i != nil {
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r += i.item.Print()
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i = i.next
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}
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return r
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}
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// Something to put in a list
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type Integer struct {
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val int
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}
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func (this *Integer) Init(i int) *Integer {
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this.val = i
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return this
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}
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func (this *Integer) Print() string {
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return string(this.val + '0')
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}
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func main() {
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list := new(List)
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list.Init()
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for i := 0; i < 10; i = i + 1 {
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integer := new(Integer)
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integer.Init(i)
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list.Insert(integer)
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}
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r := list.Print()
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if r != "9876543210" {
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panic(r)
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}
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}
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