| // run |
| |
| // Copyright 2020 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})) |
| } |
| } |
