1// Copyright 2017, 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.md file.
 4
 5// +build !purego,!appengine,!js
 6
 7package cmp
 8
 9import (
10	"reflect"
11	"unsafe"
12)
13
14const supportAllowUnexported = true
15
16// unsafeRetrieveField uses unsafe to forcibly retrieve any field from a struct
17// such that the value has read-write permissions.
18//
19// The parent struct, v, must be addressable, while f must be a StructField
20// describing the field to retrieve.
21func unsafeRetrieveField(v reflect.Value, f reflect.StructField) reflect.Value {
22	return reflect.NewAt(f.Type, unsafe.Pointer(v.UnsafeAddr()+f.Offset)).Elem()
23}