github.com/yanyiwu/go@v0.0.0-20150106053140-03d6637dbb7f/test/label1.go (about)

     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  
     8  // Verify that erroneous labels are caught by the compiler.
     9  // This set is caught by pass 2. That's why this file is label1.go.
    10  // Does not compile.
    11  
    12  package main
    13  
    14  var x int
    15  
    16  func f() {
    17  L1:
    18  	for {
    19  		if x == 0 {
    20  			break L1
    21  		}
    22  		if x == 1 {
    23  			continue L1
    24  		}
    25  		goto L1
    26  	}
    27  
    28  L2:
    29  	select {
    30  	default:
    31  		if x == 0 {
    32  			break L2
    33  		}
    34  		if x == 1 {
    35  			continue L2 // ERROR "invalid continue label .*L2"
    36  		}
    37  		goto L2
    38  	}
    39  
    40  L3:
    41  	switch {
    42  	case x > 10:
    43  		if x == 11 {
    44  			break L3
    45  		}
    46  		if x == 12 {
    47  			continue L3 // ERROR "invalid continue label .*L3"
    48  		}
    49  		goto L3
    50  	}
    51  
    52  L4:
    53  	if true {
    54  		if x == 13 {
    55  			break L4 // ERROR "invalid break label .*L4"
    56  		}
    57  		if x == 14 {
    58  			continue L4 // ERROR "invalid continue label .*L4"
    59  		}
    60  		if x == 15 {
    61  			goto L4
    62  		}
    63  	}
    64  
    65  L5:
    66  	f()
    67  	if x == 16 {
    68  		break L5 // ERROR "invalid break label .*L5"
    69  	}
    70  	if x == 17 {
    71  		continue L5 // ERROR "invalid continue label .*L5"
    72  	}
    73  	if x == 18 {
    74  		goto L5
    75  	}
    76  
    77  	for {
    78  		if x == 19 {
    79  			break L1 // ERROR "invalid break label .*L1"
    80  		}
    81  		if x == 20 {
    82  			continue L1 // ERROR "invalid continue label .*L1"
    83  		}
    84  		if x == 21 {
    85  			goto L1
    86  		}
    87  	}
    88  }