| // run |
| |
| // Copyright 2022 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. |
| |
| //go:build cgo |
| |
| package main |
| |
| import ( |
| "log" |
| "runtime/cgo" |
| "unsafe" |
| ) |
| |
| type S struct{ _ cgo.Incomplete } |
| |
| func main() { |
| p := (*S)(unsafe.Pointer(uintptr(0x8000))) |
| var v any = p |
| p2 := v.(*S) |
| if p != p2 { |
| log.Fatalf("%p != %p", unsafe.Pointer(p), unsafe.Pointer(p2)) |
| } |
| p2 = typeAssert[*S](v) |
| if p != p2 { |
| log.Fatalf("%p != %p from typeAssert", unsafe.Pointer(p), unsafe.Pointer(p2)) |
| } |
| } |
| |
| func typeAssert[T any](v any) T { |
| return v.(T) |
| } |
