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mirror of https://github.com/golang/go synced 2024-11-19 14:54:43 -07:00
go/test/switch.go
Russ Cox 1a3198907b fix "declared and not used" in tests;
also template/template.go, missed last time.

R=r
DELTA=116  (61 added, 10 deleted, 45 changed)
OCL=34620
CL=34622
2009-09-14 21:03:53 -07:00

140 lines
3.4 KiB
Go

// $G $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 assert(cond bool, msg string) {
if !cond {
print("assertion fail: ", msg, "\n");
panic(1);
}
}
func main() {
i5 := 5;
i7 := 7;
hello := "hello";
switch true {
case i5 < 5: assert(false, "<");
case i5 == 5: assert(true, "!");
case i5 > 5: assert(false, ">");
}
switch {
case i5 < 5: assert(false, "<");
case i5 == 5: assert(true, "!");
case i5 > 5: assert(false, ">");
}
switch x := 5; true {
case i5 < x: assert(false, "<");
case i5 == x: assert(true, "!");
case i5 > x: assert(false, ">");
}
switch x := 5; true {
case i5 < x: assert(false, "<");
case i5 == x: assert(true, "!");
case i5 > x: assert(false, ">");
}
switch i5 {
case 0: assert(false, "0");
case 1: assert(false, "1");
case 2: assert(false, "2");
case 3: assert(false, "3");
case 4: assert(false, "4");
case 5: assert(true, "5");
case 6: assert(false, "6");
case 7: assert(false, "7");
case 8: assert(false, "8");
case 9: assert(false, "9");
default: assert(false, "default");
}
switch i5 {
case 0,1,2,3,4: assert(false, "4");
case 5: assert(true, "5");
case 6,7,8,9: assert(false, "9");
default: assert(false, "default");
}
switch i5 {
case 0:
case 1:
case 2:
case 3:
case 4: assert(false, "4");
case 5: assert(true, "5");
case 6:
case 7:
case 8:
case 9:
default: assert(i5 == 5, "good");
}
switch i5 {
case 0: dummy := 0; _ = dummy; fallthrough;
case 1: dummy := 0; _ = dummy; fallthrough;
case 2: dummy := 0; _ = dummy; fallthrough;
case 3: dummy := 0; _ = dummy; fallthrough;
case 4: dummy := 0; _ = dummy; assert(false, "4");
case 5: dummy := 0; _ = dummy; fallthrough;
case 6: dummy := 0; _ = dummy; fallthrough;
case 7: dummy := 0; _ = dummy; fallthrough;
case 8: dummy := 0; _ = dummy; fallthrough;
case 9: dummy := 0; _ = dummy; fallthrough;
default: dummy := 0; _ = dummy; assert(i5 == 5, "good");
}
fired := false;
switch i5 {
case 0: dummy := 0; _ = dummy; fallthrough; // tests scoping of cases
case 1: dummy := 0; _ = dummy; fallthrough;
case 2: dummy := 0; _ = dummy; fallthrough;
case 3: dummy := 0; _ = dummy; fallthrough;
case 4: dummy := 0; _ = dummy; assert(false, "4");
case 5: dummy := 0; _ = dummy; fallthrough;
case 6: dummy := 0; _ = dummy; fallthrough;
case 7: dummy := 0; _ = dummy; fallthrough;
case 8: dummy := 0; _ = dummy; fallthrough;
case 9: dummy := 0; _ = dummy; fallthrough;
default: dummy := 0; _ = dummy; fired = !fired; assert(i5 == 5, "good");
}
assert(fired, "fired");
count := 0;
switch i5 {
case 0: count = count + 1; fallthrough;
case 1: count = count + 1; fallthrough;
case 2: count = count + 1; fallthrough;
case 3: count = count + 1; fallthrough;
case 4: count = count + 1; assert(false, "4");
case 5: count = count + 1; fallthrough;
case 6: count = count + 1; fallthrough;
case 7: count = count + 1; fallthrough;
case 8: count = count + 1; fallthrough;
case 9: count = count + 1; fallthrough;
default: assert(i5 == count, "good");
}
assert(fired, "fired");
switch hello {
case "wowie": assert(false, "wowie");
case "hello": assert(true, "hello");
case "jumpn": assert(false, "jumpn");
default: assert(false, "default");
}
fired = false;
switch i := i5 + 2; i {
case i7: fired = true;
default: assert(false, "fail");
}
assert(fired, "var");
}