github.com/gocuntian/go@v0.0.0-20160610041250-fee02d270bf8/test/fixedbugs/issue14006.go (about)

     1  // errorcheck
     2  
     3  // Copyright 2016 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  // Literals that happen to resolve to named constants
     8  // may be used as label names (see issue 13684). Make
     9  // sure that other literals don't crash the compiler.
    10  
    11  package main
    12  
    13  const labelname = 1
    14  
    15  func main() {
    16  	goto labelname
    17  labelname:
    18  }
    19  
    20  func f() {
    21  	var x int
    22  	switch x {
    23  	case 1:
    24  		2:	// ERROR "unexpected :"
    25  	case 2:
    26  	}
    27  
    28  	switch x {
    29  	case 1:
    30  		2: ;	// ERROR "unexpected :"
    31  	case 2:
    32  	}
    33  
    34  	var y string
    35  	switch y {
    36  	case "foo":
    37  		"bar":	// ERROR "unexpected :"
    38  	case "bar":
    39  	}
    40  
    41  	switch y {
    42  	case "foo":
    43  		"bar": ;	// ERROR "unexpected :"
    44  	case "bar":
    45  	}
    46  
    47  	var z bool
    48  	switch {
    49  	case z:
    50  		labelname:	// ERROR "missing statement after label"
    51  	case false:
    52  	}
    53  
    54  	switch {
    55  	case z:
    56  		labelname:
    57  	}
    58  
    59  	switch {
    60  	case z:
    61  		labelname: ;
    62  	case false:
    63  	}
    64  }