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 unsafeheader contains header declarations for the Go runtime's slice
6// and string implementations.
7//
8// This package allows packages that cannot import "reflect" to use types that
9// are tested to be equivalent to reflect.SliceHeader and reflect.StringHeader.
10package unsafeheader
11
12import (
13	"unsafe"
14)
15
16// Slice is the runtime representation of a slice.
17// It cannot be used safely or portably and its representation may
18// change in a later release.
19//
20// Unlike reflect.SliceHeader, its Data field is sufficient to guarantee the
21// data it references will not be garbage collected.
22type Slice struct {
23	Data unsafe.Pointer
24	Len  int
25	Cap  int
26}
27
28// String is the runtime representation of a string.
29// It cannot be used safely or portably and its representation may
30// change in a later release.
31//
32// Unlike reflect.StringHeader, its Data field is sufficient to guarantee the
33// data it references will not be garbage collected.
34type String struct {
35	Data unsafe.Pointer
36	Len  int
37}
38