gcc/testsuite/go.test/test/label1.go

   1 // errorcheck
   2
   3 // Copyright 2011 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 // Verify that erroneous labels are caught by the compiler.
   8 // This set is caught by pass 2. That's why this file is label1.go.
   9 // Does not compile.
  10
  11 package main
  12
  13 var x int
  14
  15 func f1() {
  16         switch x {
  17         case 1:
  18                 continue // ERROR "continue is not in a loop$|continue statement not within for"
  19         }
  20         select {
  21         default:
  22                 continue // ERROR "continue is not in a loop$|continue statement not within for"
  23         }
  24
  25 }
  26
  27 func f2() {
  28 L1:
  29         for {
  30                 if x == 0 {
  31                         break L1
  32                 }
  33                 if x == 1 {
  34                         continue L1
  35                 }
  36                 goto L1
  37         }
  38
  39 L2:
  40         select {
  41         default:
  42                 if x == 0 {
  43                         break L2
  44                 }
  45                 if x == 1 {
  46                         continue L2 // ERROR "invalid continue label .*L2|continue is not in a loop$"
  47                 }
  48                 goto L2
  49         }
  50
  51         for {
  52                 if x == 1 {
  53                         continue L2 // ERROR "invalid continue label .*L2"
  54                 }
  55         }
  56
  57 L3:
  58         switch {
  59         case x > 10:
  60                 if x == 11 {
  61                         break L3
  62                 }
  63                 if x == 12 {
  64                         continue L3 // ERROR "invalid continue label .*L3|continue is not in a loop$"
  65                 }
  66                 goto L3
  67         }
  68
  69 L4:
  70         if true {
  71                 if x == 13 {
  72                         break L4 // ERROR "invalid break label .*L4"
  73                 }
  74                 if x == 14 {
  75                         continue L4 // ERROR "invalid continue label .*L4|continue is not in a loop$"
  76                 }
  77                 if x == 15 {
  78                         goto L4
  79                 }
  80         }
  81
  82 L5:
  83         f2()
  84         if x == 16 {
  85                 break L5 // ERROR "invalid break label .*L5"
  86         }
  87         if x == 17 {
  88                 continue L5 // ERROR "invalid continue label .*L5|continue is not in a loop$"
  89         }
  90         if x == 18 {
  91                 goto L5
  92         }
  93
  94         for {
  95                 if x == 19 {
  96                         break L1 // ERROR "invalid break label .*L1"
  97                 }
  98                 if x == 20 {
  99                         continue L1 // ERROR "invalid continue label .*L1"
 100                 }
 101                 if x == 21 {
 102                         goto L1
 103                 }
 104         }
 105
 106         continue // ERROR "continue is not in a loop$|continue statement not within for"
 107         for {
 108                 continue on // ERROR "continue label not defined: on|invalid continue label .*on"
 109         }
 110
 111         break // ERROR "break is not in a loop, switch, or select|break statement not within for or switch or select"
 112         for {
 113                 break dance // ERROR "break label not defined: dance|invalid break label .*dance"
 114         }
 115
 116         for {
 117                 switch x {
 118                 case 1:
 119                         continue
 120                 }
 121         }
 122 }