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156 lines
2.2 KiB
Go
156 lines
2.2 KiB
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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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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package main
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func
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setpd(a []int)
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{
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// print("setpd a=", a, " len=", len(a), " cap=", cap(a), "\n");
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for i:=0; i<len(a); i++ {
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a[i] = i;
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}
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}
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func
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sumpd(a []int) int
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{
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// print("sumpd a=", a, " len=", len(a), " cap=", cap(a), "\n");
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t := 0;
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for i:=0; i<len(a); i++ {
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t += a[i];
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}
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// print("sumpd t=", t, "\n");
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return t;
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}
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func
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setpf(a *[20]int)
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{
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// print("setpf a=", a, " len=", len(a), " cap=", cap(a), "\n");
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for i:=0; i<len(a); i++ {
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a[i] = i;
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}
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}
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func
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sumpf(a *[20]int) int
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{
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// print("sumpf a=", a, " len=", len(a), " cap=", cap(a), "\n");
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t := 0;
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for i:=0; i<len(a); i++ {
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t += a[i];
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}
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// print("sumpf t=", t, "\n");
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return t;
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}
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func
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res(t int, lb, hb int)
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{
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sb := (hb-lb)*(hb+lb-1)/2;
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if t != sb {
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print( "lb=", lb,
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"; hb=", hb,
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"; t=", t,
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"; sb=", sb,
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"\n");
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panic("res")
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}
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}
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// call ptr dynamic with ptr dynamic
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func
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testpdpd()
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{
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a := make([]int, 10, 100);
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if len(a) != 10 && cap(a) != 100 {
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panic("len and cap from new: ", len(a), " ", cap(a), "\n");
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}
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a = a[0:100];
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setpd(a);
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a = a[0:10];
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res(sumpd(a), 0, 10);
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a = a[5:25];
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res(sumpd(a), 5, 25);
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}
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// call ptr fixed with ptr fixed
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func
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testpfpf()
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{
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var a [20]int;
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setpf(&a);
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res(sumpf(&a), 0, 20);
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}
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// call ptr dynamic with ptr fixed from new
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func
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testpdpf1()
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{
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a := new([40]int);
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setpd(*a);
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res(sumpd(*a), 0, 40);
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b := (*a)[5:30];
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res(sumpd(b), 5, 30);
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}
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// call ptr dynamic with ptr fixed from var
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func
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testpdpf2()
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{
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var a [80]int;
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setpd(a);
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res(sumpd(a), 0, 80);
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}
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// generate bounds error with ptr dynamic
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func
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testpdfault()
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{
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a := make([]int, 100);
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print("good\n");
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for i:=0; i<100; i++ {
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a[i] = 0;
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}
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print("should fault\n");
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a[100] = 0;
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print("bad\n");
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}
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// generate bounds error with ptr fixed
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func
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testfdfault()
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{
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var a [80]int;
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print("good\n");
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for i:=0; i<80; i++ {
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a[i] = 0;
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}
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print("should fault\n");
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x := 80;
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a[x] = 0;
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print("bad\n");
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}
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func
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main()
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{
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testpdpd();
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testpfpf();
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testpdpf1();
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testpdpf2();
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// print("testpdfault\n"); testpdfault();
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// print("testfdfault\n"); testfdfault();
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}
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