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
39
40
41
42
43
44
45
46
47
48
49
|
// $G $D/$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
import "fmt"
type Buffer int
func (*Buffer) Read() {}
type Reader interface {
Read()
}
func f() *Buffer { return nil }
func g() Reader {
// implicit interface conversion in assignment during return
return f()
}
func h() (b *Buffer, ok bool) { return }
func i() (r Reader, ok bool) {
// implicit interface conversion in multi-assignment during return
return h()
}
func fmter() (s string, i int, t string) { return "%#x %q", 100, "hello" }
func main() {
b := g()
bb, ok := b.(*Buffer)
_, _, _ = b, bb, ok
b, ok = i()
bb, ok = b.(*Buffer)
_, _, _ = b, bb, ok
s := fmt.Sprintf(fmter())
if s != "0x64 \"hello\"" {
println(s)
panic("fail")
}
}
|
