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
|
// run -gcflags=-G=3
// Copyright 2021 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"
"unsafe"
)
type pair[F1, F2 any] struct {
f1 F1
f2 F2
}
func main() {
p := pair[int32, int64]{1, 2}
if got, want := unsafe.Sizeof(p.f1), uintptr(4); got != want {
panic(fmt.Sprintf("unexpected f1 size == %d, want %d", got, want))
}
if got, want := unsafe.Sizeof(p.f2), uintptr(8); got != want {
panic(fmt.Sprintf("unexpected f2 size == %d, want %d", got, want))
}
type mypair struct {
f1 int32
f2 int64
}
mp := mypair(p)
if mp.f1 != 1 || mp.f2 != 2 {
panic(fmt.Sprintf("mp == %#v, want %#v", mp, mypair{1, 2}))
}
}
|
