1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
// errorcheck
// Copyright 2015 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.
// Verify that comparisons of slice/map/func values against converted nil
// values are properly rejected.
package p
func bug() {
type S []byte
type M map[int]int
type F func()
var s S
var m M
var f F
_ = s == S(nil) // ERROR "compare.*to nil|operator \=\= not defined for .|cannot compare"
_ = S(nil) == s // ERROR "compare.*to nil|operator \=\= not defined for .|cannot compare"
switch s {
case S(nil): // ERROR "compare.*to nil|operator \=\= not defined for .|cannot compare"
}
_ = m == M(nil) // ERROR "compare.*to nil|operator \=\= not defined for .|cannot compare"
_ = M(nil) == m // ERROR "compare.*to nil|operator \=\= not defined for .|cannot compare"
switch m {
case M(nil): // ERROR "compare.*to nil|operator \=\= not defined for .|cannot compare"
}
_ = f == F(nil) // ERROR "compare.*to nil|operator \=\= not defined for .|cannot compare"
_ = F(nil) == f // ERROR "compare.*to nil|operator \=\= not defined for .|cannot compare"
switch f {
case F(nil): // ERROR "compare.*to nil|operator \=\= not defined for .|cannot compare"
}
}
|
