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47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
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// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package impl
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import (
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"reflect"
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pref "google.golang.org/protobuf/reflect/protoreflect"
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)
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// weakFields adds methods to the exported WeakFields type for internal use.
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//
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// The exported type is an alias to an unnamed type, so methods can't be
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// defined directly on it.
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type weakFields WeakFields
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func (w *weakFields) get(num pref.FieldNumber) (_ pref.ProtoMessage, ok bool) {
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if *w == nil {
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return nil, false
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}
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m, ok := (*w)[int32(num)]
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if !ok {
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return nil, false
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}
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// As a legacy quirk, consider a typed nil to be unset.
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//
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// TODO: Consider fixing the generated set methods to clear the field
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// when provided with a typed nil.
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if v := reflect.ValueOf(m); v.Kind() == reflect.Ptr && v.IsNil() {
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return nil, false
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}
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return Export{}.ProtoMessageV2Of(m), true
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}
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func (w *weakFields) set(num pref.FieldNumber, m pref.ProtoMessage) {
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if *w == nil {
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*w = make(weakFields)
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}
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(*w)[int32(num)] = Export{}.ProtoMessageV1Of(m)
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}
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func (w *weakFields) clear(num pref.FieldNumber) {
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delete(*w, int32(num))
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}
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