| // Copyright 2017, 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.md file. |
| |
| // +build !purego |
| |
| package cmp |
| |
| import ( |
| "reflect" |
| "unsafe" |
| ) |
| |
| const supportExporters = true |
| |
| // retrieveUnexportedField uses unsafe to forcibly retrieve any field from |
| // a struct such that the value has read-write permissions. |
| // |
| // The parent struct, v, must be addressable, while f must be a StructField |
| // describing the field to retrieve. |
| func retrieveUnexportedField(v reflect.Value, f reflect.StructField) reflect.Value { |
| // See https://github.com/google/go-cmp/issues/167 for discussion of the |
| // following expression. |
| return reflect.NewAt(f.Type, unsafe.Pointer(uintptr(unsafe.Pointer(v.UnsafeAddr()))+f.Offset)).Elem() |
| } |