vendor/github.com/google/go-cmp/cmp/unsafe_reflect.go

   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
   7 package cmp
   8
   9 import (
  10         "reflect"
  11         "unsafe"
  12 )
  13
  14 const 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.
  21 func unsafeRetrieveField(v reflect.Value, f reflect.StructField) reflect.Value {
  22         return reflect.NewAt(f.Type, unsafe.Pointer(v.UnsafeAddr()+f.Offset)).Elem()
  23 }