Error matches all errors produced by packages in the protobuf module according to errors.Is.
Example usage:
if errors.Is(err, proto.Error) { ... }
var Error error
func Bool(v bool) *bool
Bool stores v in a new bool value and returns a pointer to it.
func CheckInitialized(m Message) error
CheckInitialized returns an error if any required fields in m are not set.
func ClearExtension(m Message, xt protoreflect.ExtensionType)
ClearExtension clears an extension field such that subsequent HasExtension calls return false. It panics if m is invalid or if xt does not extend m.
func Equal(x, y Message) bool
Equal reports whether two messages are equal, by recursively comparing the fields of the message.
Bytes fields are equal if they contain identical bytes. Empty bytes (regardless of nil-ness) are considered equal.
Floating-point fields are equal if they contain the same value. Unlike the == operator, a NaN is equal to another NaN.
Other scalar fields are equal if they contain the same value.
Message fields are equal if they have the same set of populated known and extension field values, and the same set of unknown fields values.
Lists are equal if they are the same length and each corresponding element is equal.
Maps are equal if they have the same set of keys and the corresponding value for each key is equal.
An invalid message is not equal to a valid message. An invalid message is only equal to another invalid message of the same type. An invalid message often corresponds to a nil pointer of the concrete message type. For example, (*pb.M)(nil) is not equal to &pb.M{}. If two valid messages marshal to the same bytes under deterministic serialization, then Equal is guaranteed to report true.
func Float32(v float32) *float32
Float32 stores v in a new float32 value and returns a pointer to it.
func Float64(v float64) *float64
Float64 stores v in a new float64 value and returns a pointer to it.
func GetExtension(m Message, xt protoreflect.ExtensionType) interface{}
GetExtension retrieves the value for an extension field. If the field is unpopulated, it returns the default value for scalars and an immutable, empty value for lists or messages. It panics if xt does not extend m.
func HasExtension(m Message, xt protoreflect.ExtensionType) bool
HasExtension reports whether an extension field is populated. It returns false if m is invalid or if xt does not extend m.
func Int32(v int32) *int32
Int32 stores v in a new int32 value and returns a pointer to it.
func Int64(v int64) *int64
Int64 stores v in a new int64 value and returns a pointer to it.
func Marshal(m Message) ([]byte, error)
Marshal returns the wire-format encoding of m.
func Merge(dst, src Message)
Merge merges src into dst, which must be a message with the same descriptor.
Populated scalar fields in src are copied to dst, while populated singular messages in src are merged into dst by recursively calling Merge. The elements of every list field in src is appended to the corresponded list fields in dst. The entries of every map field in src is copied into the corresponding map field in dst, possibly replacing existing entries. The unknown fields of src are appended to the unknown fields of dst.
It is semantically equivalent to unmarshaling the encoded form of src into dst with the [UnmarshalOptions.Merge] option specified.
func MessageName(m Message) protoreflect.FullName
MessageName returns the full name of m. If m is nil, it returns an empty string.
func RangeExtensions(m Message, f func(protoreflect.ExtensionType, interface{}) bool)
RangeExtensions iterates over every populated extension field in m in an undefined order, calling f for each extension type and value encountered. It returns immediately if f returns false. While iterating, mutating operations may only be performed on the current extension field.
func Reset(m Message)
Reset clears every field in the message. The resulting message shares no observable memory with its previous state other than the memory for the message itself.
func SetExtension(m Message, xt protoreflect.ExtensionType, v interface{})
SetExtension stores the value of an extension field. It panics if m is invalid, xt does not extend m, or if type of v is invalid for the specified extension field.
func Size(m Message) int
Size returns the size in bytes of the wire-format encoding of m.
func String(v string) *string
String stores v in a new string value and returns a pointer to it.
func Uint32(v uint32) *uint32
Uint32 stores v in a new uint32 value and returns a pointer to it.
func Uint64(v uint64) *uint64
Uint64 stores v in a new uint64 value and returns a pointer to it.
func Unmarshal(b []byte, m Message) error
Unmarshal parses the wire-format message in b and places the result in m. The provided message must be mutable (e.g., a non-nil pointer to a message).
MarshalOptions configures the marshaler.
Example usage:
b, err := MarshalOptions{Deterministic: true}.Marshal(m)
type MarshalOptions struct {
pragma.NoUnkeyedLiterals
// AllowPartial allows messages that have missing required fields to marshal
// without returning an error. If AllowPartial is false (the default),
// Marshal will return an error if there are any missing required fields.
AllowPartial bool
// Deterministic controls whether the same message will always be
// serialized to the same bytes within the same binary.
//
// Setting this option guarantees that repeated serialization of
// the same message will return the same bytes, and that different
// processes of the same binary (which may be executing on different
// machines) will serialize equal messages to the same bytes.
// It has no effect on the resulting size of the encoded message compared
// to a non-deterministic marshal.
//
// Note that the deterministic serialization is NOT canonical across
// languages. It is not guaranteed to remain stable over time. It is
// unstable across different builds with schema changes due to unknown
// fields. Users who need canonical serialization (e.g., persistent
// storage in a canonical form, fingerprinting, etc.) must define
// their own canonicalization specification and implement their own
// serializer rather than relying on this API.
//
// If deterministic serialization is requested, map entries will be
// sorted by keys in lexographical order. This is an implementation
// detail and subject to change.
Deterministic bool
// UseCachedSize indicates that the result of a previous Size call
// may be reused.
//
// Setting this option asserts that:
//
// 1. Size has previously been called on this message with identical
// options (except for UseCachedSize itself).
//
// 2. The message and all its submessages have not changed in any
// way since the Size call.
//
// If either of these invariants is violated,
// the results are undefined and may include panics or corrupted output.
//
// Implementations MAY take this option into account to provide
// better performance, but there is no guarantee that they will do so.
// There is absolutely no guarantee that Size followed by Marshal with
// UseCachedSize set will perform equivalently to Marshal alone.
UseCachedSize bool
}
func (o MarshalOptions) Marshal(m Message) ([]byte, error)
Marshal returns the wire-format encoding of m.
func (o MarshalOptions) MarshalAppend(b []byte, m Message) ([]byte, error)
MarshalAppend appends the wire-format encoding of m to b, returning the result.
func (o MarshalOptions) MarshalState(in protoiface.MarshalInput) (protoiface.MarshalOutput, error)
MarshalState returns the wire-format encoding of a message.
This method permits fine-grained control over the marshaler. Most users should use Marshal instead.
func (o MarshalOptions) Size(m Message) int
Size returns the size in bytes of the wire-format encoding of m.
Message is the top-level interface that all messages must implement. It provides access to a reflective view of a message. Any implementation of this interface may be used with all functions in the protobuf module that accept a Message, except where otherwise specified.
This is the v2 interface definition for protobuf messages. The v1 interface definition is github.com/golang/protobuf/proto.Message.
type Message = protoreflect.ProtoMessage
func Clone(m Message) Message
Clone returns a deep copy of m. If the top-level message is invalid, it returns an invalid message as well.
UnmarshalOptions configures the unmarshaler.
Example usage:
err := UnmarshalOptions{DiscardUnknown: true}.Unmarshal(b, m)
type UnmarshalOptions struct {
pragma.NoUnkeyedLiterals
// Merge merges the input into the destination message.
// The default behavior is to always reset the message before unmarshaling,
// unless Merge is specified.
Merge bool
// AllowPartial accepts input for messages that will result in missing
// required fields. If AllowPartial is false (the default), Unmarshal will
// return an error if there are any missing required fields.
AllowPartial bool
// If DiscardUnknown is set, unknown fields are ignored.
DiscardUnknown bool
// Resolver is used for looking up types when unmarshaling extension fields.
// If nil, this defaults to using protoregistry.GlobalTypes.
Resolver interface {
FindExtensionByName(field protoreflect.FullName) (protoreflect.ExtensionType, error)
FindExtensionByNumber(message protoreflect.FullName, field protoreflect.FieldNumber) (protoreflect.ExtensionType, error)
}
// RecursionLimit limits how deeply messages may be nested.
// If zero, a default limit is applied.
RecursionLimit int
}
func (o UnmarshalOptions) Unmarshal(b []byte, m Message) error
Unmarshal parses the wire-format message in b and places the result in m. The provided message must be mutable (e.g., a non-nil pointer to a message).
func (o UnmarshalOptions) UnmarshalState(in protoiface.UnmarshalInput) (protoiface.UnmarshalOutput, error)
UnmarshalState parses a wire-format message and places the result in m.
This method permits fine-grained control over the unmarshaler. Most users should use Unmarshal instead.