gopls/go/analysis/passes/unsafeptr/testdata/src/a/issue40701.go

1	// Copyright 2020 The Go Authors. All rights reserved.
2	// Use of this source code is governed by a BSD-style
3	// license that can be found in the LICENSE file.
4
5	package a
6
7	import (
8	"reflect"
9	"unsafe"
10	)
11
12	// Explicitly allocating a variable of type reflect.SliceHeader.
13	func _(p *byte, n int) []byte {
14	var sh reflect.SliceHeader
15	sh.Data = uintptr(unsafe.Pointer(p))
16	sh.Len = n
17	sh.Cap = n
18	return ([]byte)(unsafe.Pointer(&sh)) // want "possible misuse of reflect.SliceHeader"
19	}
20
21	// Implicitly allocating a variable of type reflect.SliceHeader.
22	func _(p *byte, n int) []byte {
23	return ([]byte)(unsafe.Pointer(&reflect.SliceHeader{ // want "possible misuse of reflect.SliceHeader"
24	Data: uintptr(unsafe.Pointer(p)),
25	Len: n,
26	Cap: n,
27	}))
28	}
29
30	// Use reflect.StringHeader as a composite literal value.
31	func _(p *byte, n int) []byte {
32	var res []byte
33	(reflect.StringHeader)(unsafe.Pointer(&res)) = reflect.StringHeader{ // want "possible misuse of reflect.StringHeader"
34	Data: uintptr(unsafe.Pointer(p)),
35	Len: n,
36	}
37	return res
38	}
39
40	func _() {
41	// don't crash when obj.Pkg() == nil
42	var err error
43	_ = &err
44	}
45

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