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36 lines
1.4 KiB
Go
36 lines
1.4 KiB
Go
// 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 proto
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import (
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"google.golang.org/protobuf/reflect/protoreflect"
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)
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// HasExtension reports whether an extension field is populated.
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// It panics if ext does not extend m.
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func HasExtension(m Message, ext protoreflect.ExtensionType) bool {
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return m.ProtoReflect().Has(ext.TypeDescriptor())
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}
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// ClearExtension clears an extension field such that subsequent
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// HasExtension calls return false.
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// It panics if ext does not extend m.
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func ClearExtension(m Message, ext protoreflect.ExtensionType) {
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m.ProtoReflect().Clear(ext.TypeDescriptor())
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}
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// GetExtension retrieves the value for an extension field.
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// If the field is unpopulated, it returns the default value for
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// scalars and an immutable, empty value for lists, maps, or messages.
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// It panics if ext does not extend m.
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func GetExtension(m Message, ext protoreflect.ExtensionType) interface{} {
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return ext.InterfaceOf(m.ProtoReflect().Get(ext.TypeDescriptor()))
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}
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// SetExtension stores the value of an extension field.
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// It panics if ext does not extend m or if value type is invalid for the field.
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func SetExtension(m Message, ext protoreflect.ExtensionType, value interface{}) {
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m.ProtoReflect().Set(ext.TypeDescriptor(), ext.ValueOf(value))
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}
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