mirror of
https://github.com/golang/go
synced 2024-11-27 03:41:22 -07:00
40 lines
630 B
Go
40 lines
630 B
Go
|
// 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 S[T any] struct {
|
||
|
|
val T
|
||
|
|
}
|
||
|
|
|
||
|
|
// Test type substitution where base type is unsafe.Pointer
|
||
|
|
type U[T any] unsafe.Pointer
|
||
|
|
|
||
|
|
func test[T any]() T {
|
||
|
|
var q U[T]
|
||
|
|
var v struct {
|
||
|
|
// Test derived type that contains an unsafe.Pointer
|
||
|
|
p unsafe.Pointer
|
||
|
|
val T
|
||
|
|
}
|
||
|
|
_ = q
|
||
|
|
return v.val
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
want := 0
|
||
|
|
got := test[int]()
|
||
|
|
if got != want {
|
||
|
|
panic(fmt.Sprintf("got %f, want %f", got, want))
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|