go pair 源码
golang pair 代码
文件路径：/test/typeparam/pair.go
// run
// 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}))
}
}
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