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vendor/github.com/google/go-cmp/cmp/export.go
31 строка
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Stefan Haller
go get -tool mvdan.cc/gofumpt@v0.9.2
02 июл 2026, 11:41
02 июл 2026, 11:41
6599081
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// 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 file. package cmp import ( "reflect" "unsafe" ) // 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. If addr is false, // then the returned value will be shallowed copied to be non-addressable. func retrieveUnexportedField(v reflect.Value, f reflect.StructField, addr bool) reflect.Value { ve := reflect.NewAt(f.Type, unsafe.Pointer(uintptr(unsafe.Pointer(v.UnsafeAddr()))+f.Offset)).Elem() if !addr { // A field is addressable if and only if the struct is addressable. // If the original parent value was not addressable, shallow copy the // value to make it non-addressable to avoid leaking an implementation // detail of how forcibly exporting a field works. if ve.Kind() == reflect.Interface && ve.IsNil() { return reflect.Zero(f.Type) } return reflect.ValueOf(ve.Interface()).Convert(f.Type) } return ve }