Dan Willemsen | bc60c3c | 2021-12-15 01:09:00 -0800 | [diff] [blame] | 1 | // run -gcflags=-G=3 |
| 2 | |
| 3 | // Copyright 2021 The Go Authors. All rights reserved. |
| 4 | // Use of this source code is governed by a BSD-style |
| 5 | // license that can be found in the LICENSE file. |
| 6 | |
| 7 | package main |
| 8 | |
| 9 | import ( |
| 10 | "fmt" |
| 11 | "unsafe" |
| 12 | ) |
| 13 | |
| 14 | type S[T any] struct { |
| 15 | val T |
| 16 | } |
| 17 | |
| 18 | // Test type substitution where base type is unsafe.Pointer |
| 19 | type U[T any] unsafe.Pointer |
| 20 | |
| 21 | func test[T any]() T { |
| 22 | var q U[T] |
| 23 | var v struct { |
| 24 | // Test derived type that contains an unsafe.Pointer |
| 25 | p unsafe.Pointer |
| 26 | val T |
| 27 | } |
| 28 | _ = q |
| 29 | return v.val |
| 30 | } |
| 31 | |
| 32 | func main() { |
| 33 | want := 0 |
| 34 | got := test[int]() |
| 35 | if got != want { |
| 36 | panic(fmt.Sprintf("got %f, want %f", got, want)) |
| 37 | } |
| 38 | |
| 39 | } |