mirror of
https://github.com/golang/go
synced 2024-11-22 18:14:42 -07:00
132 lines
3.0 KiB
Go
132 lines
3.0 KiB
Go
// 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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// $G $D/$F.go && $L $F.$A && ./$A.out
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package main
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func assert(cond bool, msg string) {
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if !cond {
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print "assertion fail: " + msg + "\n";
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panic 1;
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}
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}
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func main() {
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i5 := 5;
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i7 := 7;
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switch true {
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case i5 < 5: assert(false, "<");
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case i5 == 5: assert(true, "!");
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case i5 > 5: assert(false, ">");
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}
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switch {
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case i5 < 5: assert(false, "<");
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case i5 == 5: assert(true, "!");
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case i5 > 5: assert(false, ">");
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}
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switch x := 5; true {
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case i5 < x: assert(false, "<");
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case i5 == x: assert(true, "!");
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case i5 > x: assert(false, ">");
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}
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switch x := 5; {
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case i5 < x: assert(false, "<");
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case i5 == x: assert(true, "!");
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case i5 > x: assert(false, ">");
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}
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switch i5 {
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case 0: assert(false, "0");
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case 1: assert(false, "1");
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case 2: assert(false, "2");
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case 3: assert(false, "3");
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case 4: assert(false, "4");
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case 5: assert(true, "5");
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case 6: assert(false, "6");
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case 7: assert(false, "7");
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case 8: assert(false, "8");
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case 9: assert(false, "9");
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default: assert(false, "default");
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}
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switch i5 {
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case 0,1,2,3,4: assert(false, "4");
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case 5: assert(true, "5");
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case 6,7,8,9: assert(false, "9");
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default: assert(false, "default");
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}
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switch i5 {
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case 0:
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case 1:
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case 2:
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case 3:
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case 4: assert(false, "4");
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case 5: assert(true, "5");
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case 6:
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case 7:
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case 8:
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case 9:
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default: assert(i5 == 5, "good");
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}
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switch i5 {
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case 0: dummy := 0; fallthrough;
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case 1: dummy := 0; fallthrough;
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case 2: dummy := 0; fallthrough;
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case 3: dummy := 0; fallthrough;
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case 4: dummy := 0; assert(false, "4");
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case 5: dummy := 0; fallthrough;
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case 6: dummy := 0; fallthrough;
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case 7: dummy := 0; fallthrough;
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case 8: dummy := 0; fallthrough;
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case 9: dummy := 0; fallthrough;
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default: dummy := 0; assert(i5 == 5, "good");
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}
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fired := 0; // BUG: should be able to use 'false'
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switch i5 {
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case 0: dummy := 0; fallthrough; // tests scoping of cases
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case 1: dummy := 0; fallthrough;
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case 2: dummy := 0; fallthrough;
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case 3: dummy := 0; fallthrough;
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case 4: dummy := 0; assert(false, "4");
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case 5: dummy := 0; fallthrough;
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case 6: dummy := 0; fallthrough;
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case 7: dummy := 0; fallthrough;
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case 8: dummy := 0; fallthrough;
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case 9: dummy := 0; fallthrough;
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default: dummy := 0; fired = fired + 1; assert(i5 == 5, "good");
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}
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assert(fired > 0, "fired");
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count := 0;
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switch i5 {
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case 0: count = count + 1; fallthrough;
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case 1: count = count + 1; fallthrough;
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case 2: count = count + 1; fallthrough;
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case 3: count = count + 1; fallthrough;
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case 4: count = count + 1; assert(false, "4");
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case 5: count = count + 1; fallthrough;
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case 6: count = count + 1; fallthrough;
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case 7: count = count + 1; fallthrough;
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case 8: count = count + 1; fallthrough;
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case 9: count = count + 1; fallthrough;
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default: assert(i5 == count, "good");
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}
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assert(fired > 0, "fired");
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fired = 0;
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switch i := i5 + 2; i {
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case i7: fired = 1;
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default: assert(false, "fail");
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}
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assert(fired == 1, "var");
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}
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