blob: 40209f5da377a5632a921832c9db64108293b46b [file] [log] [blame]
 // \$G \$D/\$F.go && \$L \$F.\$A && ./\$A.out // Copyright 2009 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 func setpd(a []int) { // print("setpd a=", a, " len=", len(a), " cap=", cap(a), "\n"); for i := 0; i < len(a); i++ { a[i] = i } } func sumpd(a []int) int { // print("sumpd a=", a, " len=", len(a), " cap=", cap(a), "\n"); t := 0 for i := 0; i < len(a); i++ { t += a[i] } // print("sumpd t=", t, "\n"); return t } func setpf(a *[20]int) { // print("setpf a=", a, " len=", len(a), " cap=", cap(a), "\n"); for i := 0; i < len(a); i++ { a[i] = i } } func sumpf(a *[20]int) int { // print("sumpf a=", a, " len=", len(a), " cap=", cap(a), "\n"); t := 0 for i := 0; i < len(a); i++ { t += a[i] } // print("sumpf t=", t, "\n"); return t } func res(t int, lb, hb int) { sb := (hb - lb) * (hb + lb - 1) / 2 if t != sb { print("lb=", lb, "; hb=", hb, "; t=", t, "; sb=", sb, "\n") panic("res") } } // call ptr dynamic with ptr dynamic func testpdpd() { a := make([]int, 10, 100) if len(a) != 10 && cap(a) != 100 { print("len and cap from new: ", len(a), " ", cap(a), "\n") panic("fail") } a = a[0:100] setpd(a) a = a[0:10] res(sumpd(a), 0, 10) a = a[5:25] res(sumpd(a), 5, 25) } // call ptr fixed with ptr fixed func testpfpf() { var a [20]int setpf(&a) res(sumpf(&a), 0, 20) } // call ptr dynamic with ptr fixed from new func testpdpf1() { a := new([40]int) setpd(a[0:]) res(sumpd(a[0:]), 0, 40) b := (*a)[5:30] res(sumpd(b), 5, 30) } // call ptr dynamic with ptr fixed from var func testpdpf2() { var a [80]int setpd(a[0:]) res(sumpd(a[0:]), 0, 80) } // generate bounds error with ptr dynamic func testpdfault() { a := make([]int, 100) print("good\n") for i := 0; i < 100; i++ { a[i] = 0 } print("should fault\n") a[100] = 0 print("bad\n") } // generate bounds error with ptr fixed func testfdfault() { var a [80]int print("good\n") for i := 0; i < 80; i++ { a[i] = 0 } print("should fault\n") x := 80 a[x] = 0 print("bad\n") } func main() { testpdpd() testpfpf() testpdpf1() testpdpf2() // print("testpdfault\n"); testpdfault(); // print("testfdfault\n"); testfdfault(); }