go mod vendor

+ move k8s.io/apimachinery fork from go.work to go.mod
(and include it in vendor)

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/array_codec.go

@@ -0,0 +1,50 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"reflect"
+
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
+)
+
+// ArrayCodec is the Codec used for bsoncore.Array values.
+type ArrayCodec struct{}
+
+var defaultArrayCodec = NewArrayCodec()
+
+// NewArrayCodec returns an ArrayCodec.
+func NewArrayCodec() *ArrayCodec {
+	return &ArrayCodec{}
+}
+
+// EncodeValue is the ValueEncoder for bsoncore.Array values.
+func (ac *ArrayCodec) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tCoreArray {
+		return ValueEncoderError{Name: "CoreArrayEncodeValue", Types: []reflect.Type{tCoreArray}, Received: val}
+	}
+
+	arr := val.Interface().(bsoncore.Array)
+	return bsonrw.Copier{}.CopyArrayFromBytes(vw, arr)
+}
+
+// DecodeValue is the ValueDecoder for bsoncore.Array values.
+func (ac *ArrayCodec) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if !val.CanSet() || val.Type() != tCoreArray {
+		return ValueDecoderError{Name: "CoreArrayDecodeValue", Types: []reflect.Type{tCoreArray}, Received: val}
+	}
+
+	if val.IsNil() {
+		val.Set(reflect.MakeSlice(val.Type(), 0, 0))
+	}
+
+	val.SetLen(0)
+	arr, err := bsonrw.Copier{}.AppendArrayBytes(val.Interface().(bsoncore.Array), vr)
+	val.Set(reflect.ValueOf(arr))
+	return err
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/bsoncodec.go

@@ -0,0 +1,238 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec // import "go.mongodb.org/mongo-driver/bson/bsoncodec"
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
+var (
+	emptyValue = reflect.Value{}
+)
+
+// Marshaler is an interface implemented by types that can marshal themselves
+// into a BSON document represented as bytes. The bytes returned must be a valid
+// BSON document if the error is nil.
+type Marshaler interface {
+	MarshalBSON() ([]byte, error)
+}
+
+// ValueMarshaler is an interface implemented by types that can marshal
+// themselves into a BSON value as bytes. The type must be the valid type for
+// the bytes returned. The bytes and byte type together must be valid if the
+// error is nil.
+type ValueMarshaler interface {
+	MarshalBSONValue() (bsontype.Type, []byte, error)
+}
+
+// Unmarshaler is an interface implemented by types that can unmarshal a BSON
+// document representation of themselves. The BSON bytes can be assumed to be
+// valid. UnmarshalBSON must copy the BSON bytes if it wishes to retain the data
+// after returning.
+type Unmarshaler interface {
+	UnmarshalBSON([]byte) error
+}
+
+// ValueUnmarshaler is an interface implemented by types that can unmarshal a
+// BSON value representation of themselves. The BSON bytes and type can be
+// assumed to be valid. UnmarshalBSONValue must copy the BSON value bytes if it
+// wishes to retain the data after returning.
+type ValueUnmarshaler interface {
+	UnmarshalBSONValue(bsontype.Type, []byte) error
+}
+
+// ValueEncoderError is an error returned from a ValueEncoder when the provided value can't be
+// encoded by the ValueEncoder.
+type ValueEncoderError struct {
+	Name     string
+	Types    []reflect.Type
+	Kinds    []reflect.Kind
+	Received reflect.Value
+}
+
+func (vee ValueEncoderError) Error() string {
+	typeKinds := make([]string, 0, len(vee.Types)+len(vee.Kinds))
+	for _, t := range vee.Types {
+		typeKinds = append(typeKinds, t.String())
+	}
+	for _, k := range vee.Kinds {
+		if k == reflect.Map {
+			typeKinds = append(typeKinds, "map[string]*")
+			continue
+		}
+		typeKinds = append(typeKinds, k.String())
+	}
+	received := vee.Received.Kind().String()
+	if vee.Received.IsValid() {
+		received = vee.Received.Type().String()
+	}
+	return fmt.Sprintf("%s can only encode valid %s, but got %s", vee.Name, strings.Join(typeKinds, ", "), received)
+}
+
+// ValueDecoderError is an error returned from a ValueDecoder when the provided value can't be
+// decoded by the ValueDecoder.
+type ValueDecoderError struct {
+	Name     string
+	Types    []reflect.Type
+	Kinds    []reflect.Kind
+	Received reflect.Value
+}
+
+func (vde ValueDecoderError) Error() string {
+	typeKinds := make([]string, 0, len(vde.Types)+len(vde.Kinds))
+	for _, t := range vde.Types {
+		typeKinds = append(typeKinds, t.String())
+	}
+	for _, k := range vde.Kinds {
+		if k == reflect.Map {
+			typeKinds = append(typeKinds, "map[string]*")
+			continue
+		}
+		typeKinds = append(typeKinds, k.String())
+	}
+	received := vde.Received.Kind().String()
+	if vde.Received.IsValid() {
+		received = vde.Received.Type().String()
+	}
+	return fmt.Sprintf("%s can only decode valid and settable %s, but got %s", vde.Name, strings.Join(typeKinds, ", "), received)
+}
+
+// EncodeContext is the contextual information required for a Codec to encode a
+// value.
+type EncodeContext struct {
+	*Registry
+	MinSize bool
+}
+
+// DecodeContext is the contextual information required for a Codec to decode a
+// value.
+type DecodeContext struct {
+	*Registry
+	Truncate bool
+
+	// Ancestor is the type of a containing document. This is mainly used to determine what type
+	// should be used when decoding an embedded document into an empty interface. For example, if
+	// Ancestor is a bson.M, BSON embedded document values being decoded into an empty interface
+	// will be decoded into a bson.M.
+	//
+	// Deprecated: Use DefaultDocumentM or DefaultDocumentD instead.
+	Ancestor reflect.Type
+
+	// defaultDocumentType specifies the Go type to decode top-level and nested BSON documents into. In particular, the
+	// usage for this field is restricted to data typed as "interface{}" or "map[string]interface{}". If DocumentType is
+	// set to a type that a BSON document cannot be unmarshaled into (e.g. "string"), unmarshalling will result in an
+	// error. DocumentType overrides the Ancestor field.
+	defaultDocumentType reflect.Type
+}
+
+// DefaultDocumentM will decode empty documents using the primitive.M type. This behavior is restricted to data typed as
+// "interface{}" or "map[string]interface{}".
+func (dc *DecodeContext) DefaultDocumentM() {
+	dc.defaultDocumentType = reflect.TypeOf(primitive.M{})
+}
+
+// DefaultDocumentD will decode empty documents using the primitive.D type. This behavior is restricted to data typed as
+// "interface{}" or "map[string]interface{}".
+func (dc *DecodeContext) DefaultDocumentD() {
+	dc.defaultDocumentType = reflect.TypeOf(primitive.D{})
+}
+
+// ValueCodec is the interface that groups the methods to encode and decode
+// values.
+type ValueCodec interface {
+	ValueEncoder
+	ValueDecoder
+}
+
+// ValueEncoder is the interface implemented by types that can handle the encoding of a value.
+type ValueEncoder interface {
+	EncodeValue(EncodeContext, bsonrw.ValueWriter, reflect.Value) error
+}
+
+// ValueEncoderFunc is an adapter function that allows a function with the correct signature to be
+// used as a ValueEncoder.
+type ValueEncoderFunc func(EncodeContext, bsonrw.ValueWriter, reflect.Value) error
+
+// EncodeValue implements the ValueEncoder interface.
+func (fn ValueEncoderFunc) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	return fn(ec, vw, val)
+}
+
+// ValueDecoder is the interface implemented by types that can handle the decoding of a value.
+type ValueDecoder interface {
+	DecodeValue(DecodeContext, bsonrw.ValueReader, reflect.Value) error
+}
+
+// ValueDecoderFunc is an adapter function that allows a function with the correct signature to be
+// used as a ValueDecoder.
+type ValueDecoderFunc func(DecodeContext, bsonrw.ValueReader, reflect.Value) error
+
+// DecodeValue implements the ValueDecoder interface.
+func (fn ValueDecoderFunc) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	return fn(dc, vr, val)
+}
+
+// typeDecoder is the interface implemented by types that can handle the decoding of a value given its type.
+type typeDecoder interface {
+	decodeType(DecodeContext, bsonrw.ValueReader, reflect.Type) (reflect.Value, error)
+}
+
+// typeDecoderFunc is an adapter function that allows a function with the correct signature to be used as a typeDecoder.
+type typeDecoderFunc func(DecodeContext, bsonrw.ValueReader, reflect.Type) (reflect.Value, error)
+
+func (fn typeDecoderFunc) decodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+	return fn(dc, vr, t)
+}
+
+// decodeAdapter allows two functions with the correct signatures to be used as both a ValueDecoder and typeDecoder.
+type decodeAdapter struct {
+	ValueDecoderFunc
+	typeDecoderFunc
+}
+
+var _ ValueDecoder = decodeAdapter{}
+var _ typeDecoder = decodeAdapter{}
+
+// decodeTypeOrValue calls decoder.decodeType is decoder is a typeDecoder. Otherwise, it allocates a new element of type
+// t and calls decoder.DecodeValue on it.
+func decodeTypeOrValue(decoder ValueDecoder, dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+	td, _ := decoder.(typeDecoder)
+	return decodeTypeOrValueWithInfo(decoder, td, dc, vr, t, true)
+}
+
+func decodeTypeOrValueWithInfo(vd ValueDecoder, td typeDecoder, dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type, convert bool) (reflect.Value, error) {
+	if td != nil {
+		val, err := td.decodeType(dc, vr, t)
+		if err == nil && convert && val.Type() != t {
+			// This conversion step is necessary for slices and maps. If a user declares variables like:
+			//
+			// type myBool bool
+			// var m map[string]myBool
+			//
+			// and tries to decode BSON bytes into the map, the decoding will fail if this conversion is not present
+			// because we'll try to assign a value of type bool to one of type myBool.
+			val = val.Convert(t)
+		}
+		return val, err
+	}
+
+	val := reflect.New(t).Elem()
+	err := vd.DecodeValue(dc, vr, val)
+	return val, err
+}
+
+// CodecZeroer is the interface implemented by Codecs that can also determine if
+// a value of the type that would be encoded is zero.
+type CodecZeroer interface {
+	IsTypeZero(interface{}) bool
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/byte_slice_codec.go

@@ -0,0 +1,111 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"fmt"
+	"reflect"
+
+	"go.mongodb.org/mongo-driver/bson/bsonoptions"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+)
+
+// ByteSliceCodec is the Codec used for []byte values.
+type ByteSliceCodec struct {
+	EncodeNilAsEmpty bool
+}
+
+var (
+	defaultByteSliceCodec = NewByteSliceCodec()
+
+	_ ValueCodec  = defaultByteSliceCodec
+	_ typeDecoder = defaultByteSliceCodec
+)
+
+// NewByteSliceCodec returns a StringCodec with options opts.
+func NewByteSliceCodec(opts ...*bsonoptions.ByteSliceCodecOptions) *ByteSliceCodec {
+	byteSliceOpt := bsonoptions.MergeByteSliceCodecOptions(opts...)
+	codec := ByteSliceCodec{}
+	if byteSliceOpt.EncodeNilAsEmpty != nil {
+		codec.EncodeNilAsEmpty = *byteSliceOpt.EncodeNilAsEmpty
+	}
+	return &codec
+}
+
+// EncodeValue is the ValueEncoder for []byte.
+func (bsc *ByteSliceCodec) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tByteSlice {
+		return ValueEncoderError{Name: "ByteSliceEncodeValue", Types: []reflect.Type{tByteSlice}, Received: val}
+	}
+	if val.IsNil() && !bsc.EncodeNilAsEmpty {
+		return vw.WriteNull()
+	}
+	return vw.WriteBinary(val.Interface().([]byte))
+}
+
+func (bsc *ByteSliceCodec) decodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+	if t != tByteSlice {
+		return emptyValue, ValueDecoderError{
+			Name:     "ByteSliceDecodeValue",
+			Types:    []reflect.Type{tByteSlice},
+			Received: reflect.Zero(t),
+		}
+	}
+
+	var data []byte
+	var err error
+	switch vrType := vr.Type(); vrType {
+	case bsontype.String:
+		str, err := vr.ReadString()
+		if err != nil {
+			return emptyValue, err
+		}
+		data = []byte(str)
+	case bsontype.Symbol:
+		sym, err := vr.ReadSymbol()
+		if err != nil {
+			return emptyValue, err
+		}
+		data = []byte(sym)
+	case bsontype.Binary:
+		var subtype byte
+		data, subtype, err = vr.ReadBinary()
+		if err != nil {
+			return emptyValue, err
+		}
+		if subtype != bsontype.BinaryGeneric && subtype != bsontype.BinaryBinaryOld {
+			return emptyValue, decodeBinaryError{subtype: subtype, typeName: "[]byte"}
+		}
+	case bsontype.Null:
+		err = vr.ReadNull()
+	case bsontype.Undefined:
+		err = vr.ReadUndefined()
+	default:
+		return emptyValue, fmt.Errorf("cannot decode %v into a []byte", vrType)
+	}
+	if err != nil {
+		return emptyValue, err
+	}
+
+	return reflect.ValueOf(data), nil
+}
+
+// DecodeValue is the ValueDecoder for []byte.
+func (bsc *ByteSliceCodec) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if !val.CanSet() || val.Type() != tByteSlice {
+		return ValueDecoderError{Name: "ByteSliceDecodeValue", Types: []reflect.Type{tByteSlice}, Received: val}
+	}
+
+	elem, err := bsc.decodeType(dc, vr, tByteSlice)
+	if err != nil {
+		return err
+	}
+
+	val.Set(elem)
+	return nil
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/cond_addr_codec.go

@@ -0,0 +1,63 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"reflect"
+
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+)
+
+// condAddrEncoder is the encoder used when a pointer to the encoding value has an encoder.
+type condAddrEncoder struct {
+	canAddrEnc ValueEncoder
+	elseEnc    ValueEncoder
+}
+
+var _ ValueEncoder = (*condAddrEncoder)(nil)
+
+// newCondAddrEncoder returns an condAddrEncoder.
+func newCondAddrEncoder(canAddrEnc, elseEnc ValueEncoder) *condAddrEncoder {
+	encoder := condAddrEncoder{canAddrEnc: canAddrEnc, elseEnc: elseEnc}
+	return &encoder
+}
+
+// EncodeValue is the ValueEncoderFunc for a value that may be addressable.
+func (cae *condAddrEncoder) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if val.CanAddr() {
+		return cae.canAddrEnc.EncodeValue(ec, vw, val)
+	}
+	if cae.elseEnc != nil {
+		return cae.elseEnc.EncodeValue(ec, vw, val)
+	}
+	return ErrNoEncoder{Type: val.Type()}
+}
+
+// condAddrDecoder is the decoder used when a pointer to the value has a decoder.
+type condAddrDecoder struct {
+	canAddrDec ValueDecoder
+	elseDec    ValueDecoder
+}
+
+var _ ValueDecoder = (*condAddrDecoder)(nil)
+
+// newCondAddrDecoder returns an CondAddrDecoder.
+func newCondAddrDecoder(canAddrDec, elseDec ValueDecoder) *condAddrDecoder {
+	decoder := condAddrDecoder{canAddrDec: canAddrDec, elseDec: elseDec}
+	return &decoder
+}
+
+// DecodeValue is the ValueDecoderFunc for a value that may be addressable.
+func (cad *condAddrDecoder) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if val.CanAddr() {
+		return cad.canAddrDec.DecodeValue(dc, vr, val)
+	}
+	if cad.elseDec != nil {
+		return cad.elseDec.DecodeValue(dc, vr, val)
+	}
+	return ErrNoDecoder{Type: val.Type()}
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/default_value_encoders.go

@@ -0,0 +1,766 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"math"
+	"net/url"
+	"reflect"
+	"sync"
+	"time"
+
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
+)
+
+var defaultValueEncoders DefaultValueEncoders
+
+var bvwPool = bsonrw.NewBSONValueWriterPool()
+
+var errInvalidValue = errors.New("cannot encode invalid element")
+
+var sliceWriterPool = sync.Pool{
+	New: func() interface{} {
+		sw := make(bsonrw.SliceWriter, 0)
+		return &sw
+	},
+}
+
+func encodeElement(ec EncodeContext, dw bsonrw.DocumentWriter, e primitive.E) error {
+	vw, err := dw.WriteDocumentElement(e.Key)
+	if err != nil {
+		return err
+	}
+
+	if e.Value == nil {
+		return vw.WriteNull()
+	}
+	encoder, err := ec.LookupEncoder(reflect.TypeOf(e.Value))
+	if err != nil {
+		return err
+	}
+
+	err = encoder.EncodeValue(ec, vw, reflect.ValueOf(e.Value))
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// DefaultValueEncoders is a namespace type for the default ValueEncoders used
+// when creating a registry.
+type DefaultValueEncoders struct{}
+
+// RegisterDefaultEncoders will register the encoder methods attached to DefaultValueEncoders with
+// the provided RegistryBuilder.
+func (dve DefaultValueEncoders) RegisterDefaultEncoders(rb *RegistryBuilder) {
+	if rb == nil {
+		panic(errors.New("argument to RegisterDefaultEncoders must not be nil"))
+	}
+	rb.
+		RegisterTypeEncoder(tByteSlice, defaultByteSliceCodec).
+		RegisterTypeEncoder(tTime, defaultTimeCodec).
+		RegisterTypeEncoder(tEmpty, defaultEmptyInterfaceCodec).
+		RegisterTypeEncoder(tCoreArray, defaultArrayCodec).
+		RegisterTypeEncoder(tOID, ValueEncoderFunc(dve.ObjectIDEncodeValue)).
+		RegisterTypeEncoder(tDecimal, ValueEncoderFunc(dve.Decimal128EncodeValue)).
+		RegisterTypeEncoder(tJSONNumber, ValueEncoderFunc(dve.JSONNumberEncodeValue)).
+		RegisterTypeEncoder(tURL, ValueEncoderFunc(dve.URLEncodeValue)).
+		RegisterTypeEncoder(tJavaScript, ValueEncoderFunc(dve.JavaScriptEncodeValue)).
+		RegisterTypeEncoder(tSymbol, ValueEncoderFunc(dve.SymbolEncodeValue)).
+		RegisterTypeEncoder(tBinary, ValueEncoderFunc(dve.BinaryEncodeValue)).
+		RegisterTypeEncoder(tUndefined, ValueEncoderFunc(dve.UndefinedEncodeValue)).
+		RegisterTypeEncoder(tDateTime, ValueEncoderFunc(dve.DateTimeEncodeValue)).
+		RegisterTypeEncoder(tNull, ValueEncoderFunc(dve.NullEncodeValue)).
+		RegisterTypeEncoder(tRegex, ValueEncoderFunc(dve.RegexEncodeValue)).
+		RegisterTypeEncoder(tDBPointer, ValueEncoderFunc(dve.DBPointerEncodeValue)).
+		RegisterTypeEncoder(tTimestamp, ValueEncoderFunc(dve.TimestampEncodeValue)).
+		RegisterTypeEncoder(tMinKey, ValueEncoderFunc(dve.MinKeyEncodeValue)).
+		RegisterTypeEncoder(tMaxKey, ValueEncoderFunc(dve.MaxKeyEncodeValue)).
+		RegisterTypeEncoder(tCoreDocument, ValueEncoderFunc(dve.CoreDocumentEncodeValue)).
+		RegisterTypeEncoder(tCodeWithScope, ValueEncoderFunc(dve.CodeWithScopeEncodeValue)).
+		RegisterDefaultEncoder(reflect.Bool, ValueEncoderFunc(dve.BooleanEncodeValue)).
+		RegisterDefaultEncoder(reflect.Int, ValueEncoderFunc(dve.IntEncodeValue)).
+		RegisterDefaultEncoder(reflect.Int8, ValueEncoderFunc(dve.IntEncodeValue)).
+		RegisterDefaultEncoder(reflect.Int16, ValueEncoderFunc(dve.IntEncodeValue)).
+		RegisterDefaultEncoder(reflect.Int32, ValueEncoderFunc(dve.IntEncodeValue)).
+		RegisterDefaultEncoder(reflect.Int64, ValueEncoderFunc(dve.IntEncodeValue)).
+		RegisterDefaultEncoder(reflect.Uint, defaultUIntCodec).
+		RegisterDefaultEncoder(reflect.Uint8, defaultUIntCodec).
+		RegisterDefaultEncoder(reflect.Uint16, defaultUIntCodec).
+		RegisterDefaultEncoder(reflect.Uint32, defaultUIntCodec).
+		RegisterDefaultEncoder(reflect.Uint64, defaultUIntCodec).
+		RegisterDefaultEncoder(reflect.Float32, ValueEncoderFunc(dve.FloatEncodeValue)).
+		RegisterDefaultEncoder(reflect.Float64, ValueEncoderFunc(dve.FloatEncodeValue)).
+		RegisterDefaultEncoder(reflect.Array, ValueEncoderFunc(dve.ArrayEncodeValue)).
+		RegisterDefaultEncoder(reflect.Map, defaultMapCodec).
+		RegisterDefaultEncoder(reflect.Slice, defaultSliceCodec).
+		RegisterDefaultEncoder(reflect.String, defaultStringCodec).
+		RegisterDefaultEncoder(reflect.Struct, newDefaultStructCodec()).
+		RegisterDefaultEncoder(reflect.Ptr, NewPointerCodec()).
+		RegisterHookEncoder(tValueMarshaler, ValueEncoderFunc(dve.ValueMarshalerEncodeValue)).
+		RegisterHookEncoder(tMarshaler, ValueEncoderFunc(dve.MarshalerEncodeValue)).
+		RegisterHookEncoder(tProxy, ValueEncoderFunc(dve.ProxyEncodeValue))
+}
+
+// BooleanEncodeValue is the ValueEncoderFunc for bool types.
+func (dve DefaultValueEncoders) BooleanEncodeValue(ectx EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Kind() != reflect.Bool {
+		return ValueEncoderError{Name: "BooleanEncodeValue", Kinds: []reflect.Kind{reflect.Bool}, Received: val}
+	}
+	return vw.WriteBoolean(val.Bool())
+}
+
+func fitsIn32Bits(i int64) bool {
+	return math.MinInt32 <= i && i <= math.MaxInt32
+}
+
+// IntEncodeValue is the ValueEncoderFunc for int types.
+func (dve DefaultValueEncoders) IntEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	switch val.Kind() {
+	case reflect.Int8, reflect.Int16, reflect.Int32:
+		return vw.WriteInt32(int32(val.Int()))
+	case reflect.Int:
+		i64 := val.Int()
+		if fitsIn32Bits(i64) {
+			return vw.WriteInt32(int32(i64))
+		}
+		return vw.WriteInt64(i64)
+	case reflect.Int64:
+		i64 := val.Int()
+		if ec.MinSize && fitsIn32Bits(i64) {
+			return vw.WriteInt32(int32(i64))
+		}
+		return vw.WriteInt64(i64)
+	}
+
+	return ValueEncoderError{
+		Name:     "IntEncodeValue",
+		Kinds:    []reflect.Kind{reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int},
+		Received: val,
+	}
+}
+
+// UintEncodeValue is the ValueEncoderFunc for uint types.
+//
+// Deprecated: UintEncodeValue is not registered by default. Use UintCodec.EncodeValue instead.
+func (dve DefaultValueEncoders) UintEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	switch val.Kind() {
+	case reflect.Uint8, reflect.Uint16:
+		return vw.WriteInt32(int32(val.Uint()))
+	case reflect.Uint, reflect.Uint32, reflect.Uint64:
+		u64 := val.Uint()
+		if ec.MinSize && u64 <= math.MaxInt32 {
+			return vw.WriteInt32(int32(u64))
+		}
+		if u64 > math.MaxInt64 {
+			return fmt.Errorf("%d overflows int64", u64)
+		}
+		return vw.WriteInt64(int64(u64))
+	}
+
+	return ValueEncoderError{
+		Name:     "UintEncodeValue",
+		Kinds:    []reflect.Kind{reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint},
+		Received: val,
+	}
+}
+
+// FloatEncodeValue is the ValueEncoderFunc for float types.
+func (dve DefaultValueEncoders) FloatEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	switch val.Kind() {
+	case reflect.Float32, reflect.Float64:
+		return vw.WriteDouble(val.Float())
+	}
+
+	return ValueEncoderError{Name: "FloatEncodeValue", Kinds: []reflect.Kind{reflect.Float32, reflect.Float64}, Received: val}
+}
+
+// StringEncodeValue is the ValueEncoderFunc for string types.
+//
+// Deprecated: StringEncodeValue is not registered by default. Use StringCodec.EncodeValue instead.
+func (dve DefaultValueEncoders) StringEncodeValue(ectx EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if val.Kind() != reflect.String {
+		return ValueEncoderError{
+			Name:     "StringEncodeValue",
+			Kinds:    []reflect.Kind{reflect.String},
+			Received: val,
+		}
+	}
+
+	return vw.WriteString(val.String())
+}
+
+// ObjectIDEncodeValue is the ValueEncoderFunc for primitive.ObjectID.
+func (dve DefaultValueEncoders) ObjectIDEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tOID {
+		return ValueEncoderError{Name: "ObjectIDEncodeValue", Types: []reflect.Type{tOID}, Received: val}
+	}
+	return vw.WriteObjectID(val.Interface().(primitive.ObjectID))
+}
+
+// Decimal128EncodeValue is the ValueEncoderFunc for primitive.Decimal128.
+func (dve DefaultValueEncoders) Decimal128EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tDecimal {
+		return ValueEncoderError{Name: "Decimal128EncodeValue", Types: []reflect.Type{tDecimal}, Received: val}
+	}
+	return vw.WriteDecimal128(val.Interface().(primitive.Decimal128))
+}
+
+// JSONNumberEncodeValue is the ValueEncoderFunc for json.Number.
+func (dve DefaultValueEncoders) JSONNumberEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tJSONNumber {
+		return ValueEncoderError{Name: "JSONNumberEncodeValue", Types: []reflect.Type{tJSONNumber}, Received: val}
+	}
+	jsnum := val.Interface().(json.Number)
+
+	// Attempt int first, then float64
+	if i64, err := jsnum.Int64(); err == nil {
+		return dve.IntEncodeValue(ec, vw, reflect.ValueOf(i64))
+	}
+
+	f64, err := jsnum.Float64()
+	if err != nil {
+		return err
+	}
+
+	return dve.FloatEncodeValue(ec, vw, reflect.ValueOf(f64))
+}
+
+// URLEncodeValue is the ValueEncoderFunc for url.URL.
+func (dve DefaultValueEncoders) URLEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tURL {
+		return ValueEncoderError{Name: "URLEncodeValue", Types: []reflect.Type{tURL}, Received: val}
+	}
+	u := val.Interface().(url.URL)
+	return vw.WriteString(u.String())
+}
+
+// TimeEncodeValue is the ValueEncoderFunc for time.TIme.
+//
+// Deprecated: TimeEncodeValue is not registered by default. Use TimeCodec.EncodeValue instead.
+func (dve DefaultValueEncoders) TimeEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tTime {
+		return ValueEncoderError{Name: "TimeEncodeValue", Types: []reflect.Type{tTime}, Received: val}
+	}
+	tt := val.Interface().(time.Time)
+	dt := primitive.NewDateTimeFromTime(tt)
+	return vw.WriteDateTime(int64(dt))
+}
+
+// ByteSliceEncodeValue is the ValueEncoderFunc for []byte.
+//
+// Deprecated: ByteSliceEncodeValue is not registered by default. Use ByteSliceCodec.EncodeValue instead.
+func (dve DefaultValueEncoders) ByteSliceEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tByteSlice {
+		return ValueEncoderError{Name: "ByteSliceEncodeValue", Types: []reflect.Type{tByteSlice}, Received: val}
+	}
+	if val.IsNil() {
+		return vw.WriteNull()
+	}
+	return vw.WriteBinary(val.Interface().([]byte))
+}
+
+// MapEncodeValue is the ValueEncoderFunc for map[string]* types.
+//
+// Deprecated: MapEncodeValue is not registered by default. Use MapCodec.EncodeValue instead.
+func (dve DefaultValueEncoders) MapEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Kind() != reflect.Map || val.Type().Key().Kind() != reflect.String {
+		return ValueEncoderError{Name: "MapEncodeValue", Kinds: []reflect.Kind{reflect.Map}, Received: val}
+	}
+
+	if val.IsNil() {
+		// If we have a nill map but we can't WriteNull, that means we're probably trying to encode
+		// to a TopLevel document. We can't currently tell if this is what actually happened, but if
+		// there's a deeper underlying problem, the error will also be returned from WriteDocument,
+		// so just continue. The operations on a map reflection value are valid, so we can call
+		// MapKeys within mapEncodeValue without a problem.
+		err := vw.WriteNull()
+		if err == nil {
+			return nil
+		}
+	}
+
+	dw, err := vw.WriteDocument()
+	if err != nil {
+		return err
+	}
+
+	return dve.mapEncodeValue(ec, dw, val, nil)
+}
+
+// mapEncodeValue handles encoding of the values of a map. The collisionFn returns
+// true if the provided key exists, this is mainly used for inline maps in the
+// struct codec.
+func (dve DefaultValueEncoders) mapEncodeValue(ec EncodeContext, dw bsonrw.DocumentWriter, val reflect.Value, collisionFn func(string) bool) error {
+
+	elemType := val.Type().Elem()
+	encoder, err := ec.LookupEncoder(elemType)
+	if err != nil && elemType.Kind() != reflect.Interface {
+		return err
+	}
+
+	keys := val.MapKeys()
+	for _, key := range keys {
+		if collisionFn != nil && collisionFn(key.String()) {
+			return fmt.Errorf("Key %s of inlined map conflicts with a struct field name", key)
+		}
+
+		currEncoder, currVal, lookupErr := dve.lookupElementEncoder(ec, encoder, val.MapIndex(key))
+		if lookupErr != nil && lookupErr != errInvalidValue {
+			return lookupErr
+		}
+
+		vw, err := dw.WriteDocumentElement(key.String())
+		if err != nil {
+			return err
+		}
+
+		if lookupErr == errInvalidValue {
+			err = vw.WriteNull()
+			if err != nil {
+				return err
+			}
+			continue
+		}
+
+		err = currEncoder.EncodeValue(ec, vw, currVal)
+		if err != nil {
+			return err
+		}
+	}
+
+	return dw.WriteDocumentEnd()
+}
+
+// ArrayEncodeValue is the ValueEncoderFunc for array types.
+func (dve DefaultValueEncoders) ArrayEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Kind() != reflect.Array {
+		return ValueEncoderError{Name: "ArrayEncodeValue", Kinds: []reflect.Kind{reflect.Array}, Received: val}
+	}
+
+	// If we have a []primitive.E we want to treat it as a document instead of as an array.
+	if val.Type().Elem() == tE {
+		dw, err := vw.WriteDocument()
+		if err != nil {
+			return err
+		}
+
+		for idx := 0; idx < val.Len(); idx++ {
+			e := val.Index(idx).Interface().(primitive.E)
+			err = encodeElement(ec, dw, e)
+			if err != nil {
+				return err
+			}
+		}
+
+		return dw.WriteDocumentEnd()
+	}
+
+	// If we have a []byte we want to treat it as a binary instead of as an array.
+	if val.Type().Elem() == tByte {
+		var byteSlice []byte
+		for idx := 0; idx < val.Len(); idx++ {
+			byteSlice = append(byteSlice, val.Index(idx).Interface().(byte))
+		}
+		return vw.WriteBinary(byteSlice)
+	}
+
+	aw, err := vw.WriteArray()
+	if err != nil {
+		return err
+	}
+
+	elemType := val.Type().Elem()
+	encoder, err := ec.LookupEncoder(elemType)
+	if err != nil && elemType.Kind() != reflect.Interface {
+		return err
+	}
+
+	for idx := 0; idx < val.Len(); idx++ {
+		currEncoder, currVal, lookupErr := dve.lookupElementEncoder(ec, encoder, val.Index(idx))
+		if lookupErr != nil && lookupErr != errInvalidValue {
+			return lookupErr
+		}
+
+		vw, err := aw.WriteArrayElement()
+		if err != nil {
+			return err
+		}
+
+		if lookupErr == errInvalidValue {
+			err = vw.WriteNull()
+			if err != nil {
+				return err
+			}
+			continue
+		}
+
+		err = currEncoder.EncodeValue(ec, vw, currVal)
+		if err != nil {
+			return err
+		}
+	}
+	return aw.WriteArrayEnd()
+}
+
+// SliceEncodeValue is the ValueEncoderFunc for slice types.
+//
+// Deprecated: SliceEncodeValue is not registered by default. Use SliceCodec.EncodeValue instead.
+func (dve DefaultValueEncoders) SliceEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Kind() != reflect.Slice {
+		return ValueEncoderError{Name: "SliceEncodeValue", Kinds: []reflect.Kind{reflect.Slice}, Received: val}
+	}
+
+	if val.IsNil() {
+		return vw.WriteNull()
+	}
+
+	// If we have a []primitive.E we want to treat it as a document instead of as an array.
+	if val.Type().ConvertibleTo(tD) {
+		d := val.Convert(tD).Interface().(primitive.D)
+
+		dw, err := vw.WriteDocument()
+		if err != nil {
+			return err
+		}
+
+		for _, e := range d {
+			err = encodeElement(ec, dw, e)
+			if err != nil {
+				return err
+			}
+		}
+
+		return dw.WriteDocumentEnd()
+	}
+
+	aw, err := vw.WriteArray()
+	if err != nil {
+		return err
+	}
+
+	elemType := val.Type().Elem()
+	encoder, err := ec.LookupEncoder(elemType)
+	if err != nil && elemType.Kind() != reflect.Interface {
+		return err
+	}
+
+	for idx := 0; idx < val.Len(); idx++ {
+		currEncoder, currVal, lookupErr := dve.lookupElementEncoder(ec, encoder, val.Index(idx))
+		if lookupErr != nil && lookupErr != errInvalidValue {
+			return lookupErr
+		}
+
+		vw, err := aw.WriteArrayElement()
+		if err != nil {
+			return err
+		}
+
+		if lookupErr == errInvalidValue {
+			err = vw.WriteNull()
+			if err != nil {
+				return err
+			}
+			continue
+		}
+
+		err = currEncoder.EncodeValue(ec, vw, currVal)
+		if err != nil {
+			return err
+		}
+	}
+	return aw.WriteArrayEnd()
+}
+
+func (dve DefaultValueEncoders) lookupElementEncoder(ec EncodeContext, origEncoder ValueEncoder, currVal reflect.Value) (ValueEncoder, reflect.Value, error) {
+	if origEncoder != nil || (currVal.Kind() != reflect.Interface) {
+		return origEncoder, currVal, nil
+	}
+	currVal = currVal.Elem()
+	if !currVal.IsValid() {
+		return nil, currVal, errInvalidValue
+	}
+	currEncoder, err := ec.LookupEncoder(currVal.Type())
+
+	return currEncoder, currVal, err
+}
+
+// EmptyInterfaceEncodeValue is the ValueEncoderFunc for interface{}.
+//
+// Deprecated: EmptyInterfaceEncodeValue is not registered by default. Use EmptyInterfaceCodec.EncodeValue instead.
+func (dve DefaultValueEncoders) EmptyInterfaceEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tEmpty {
+		return ValueEncoderError{Name: "EmptyInterfaceEncodeValue", Types: []reflect.Type{tEmpty}, Received: val}
+	}
+
+	if val.IsNil() {
+		return vw.WriteNull()
+	}
+	encoder, err := ec.LookupEncoder(val.Elem().Type())
+	if err != nil {
+		return err
+	}
+
+	return encoder.EncodeValue(ec, vw, val.Elem())
+}
+
+// ValueMarshalerEncodeValue is the ValueEncoderFunc for ValueMarshaler implementations.
+func (dve DefaultValueEncoders) ValueMarshalerEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	// Either val or a pointer to val must implement ValueMarshaler
+	switch {
+	case !val.IsValid():
+		return ValueEncoderError{Name: "ValueMarshalerEncodeValue", Types: []reflect.Type{tValueMarshaler}, Received: val}
+	case val.Type().Implements(tValueMarshaler):
+		// If ValueMarshaler is implemented on a concrete type, make sure that val isn't a nil pointer
+		if isImplementationNil(val, tValueMarshaler) {
+			return vw.WriteNull()
+		}
+	case reflect.PtrTo(val.Type()).Implements(tValueMarshaler) && val.CanAddr():
+		val = val.Addr()
+	default:
+		return ValueEncoderError{Name: "ValueMarshalerEncodeValue", Types: []reflect.Type{tValueMarshaler}, Received: val}
+	}
+
+	fn := val.Convert(tValueMarshaler).MethodByName("MarshalBSONValue")
+	returns := fn.Call(nil)
+	if !returns[2].IsNil() {
+		return returns[2].Interface().(error)
+	}
+	t, data := returns[0].Interface().(bsontype.Type), returns[1].Interface().([]byte)
+	return bsonrw.Copier{}.CopyValueFromBytes(vw, t, data)
+}
+
+// MarshalerEncodeValue is the ValueEncoderFunc for Marshaler implementations.
+func (dve DefaultValueEncoders) MarshalerEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	// Either val or a pointer to val must implement Marshaler
+	switch {
+	case !val.IsValid():
+		return ValueEncoderError{Name: "MarshalerEncodeValue", Types: []reflect.Type{tMarshaler}, Received: val}
+	case val.Type().Implements(tMarshaler):
+		// If Marshaler is implemented on a concrete type, make sure that val isn't a nil pointer
+		if isImplementationNil(val, tMarshaler) {
+			return vw.WriteNull()
+		}
+	case reflect.PtrTo(val.Type()).Implements(tMarshaler) && val.CanAddr():
+		val = val.Addr()
+	default:
+		return ValueEncoderError{Name: "MarshalerEncodeValue", Types: []reflect.Type{tMarshaler}, Received: val}
+	}
+
+	fn := val.Convert(tMarshaler).MethodByName("MarshalBSON")
+	returns := fn.Call(nil)
+	if !returns[1].IsNil() {
+		return returns[1].Interface().(error)
+	}
+	data := returns[0].Interface().([]byte)
+	return bsonrw.Copier{}.CopyValueFromBytes(vw, bsontype.EmbeddedDocument, data)
+}
+
+// ProxyEncodeValue is the ValueEncoderFunc for Proxy implementations.
+func (dve DefaultValueEncoders) ProxyEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	// Either val or a pointer to val must implement Proxy
+	switch {
+	case !val.IsValid():
+		return ValueEncoderError{Name: "ProxyEncodeValue", Types: []reflect.Type{tProxy}, Received: val}
+	case val.Type().Implements(tProxy):
+		// If Proxy is implemented on a concrete type, make sure that val isn't a nil pointer
+		if isImplementationNil(val, tProxy) {
+			return vw.WriteNull()
+		}
+	case reflect.PtrTo(val.Type()).Implements(tProxy) && val.CanAddr():
+		val = val.Addr()
+	default:
+		return ValueEncoderError{Name: "ProxyEncodeValue", Types: []reflect.Type{tProxy}, Received: val}
+	}
+
+	fn := val.Convert(tProxy).MethodByName("ProxyBSON")
+	returns := fn.Call(nil)
+	if !returns[1].IsNil() {
+		return returns[1].Interface().(error)
+	}
+	data := returns[0]
+	var encoder ValueEncoder
+	var err error
+	if data.Elem().IsValid() {
+		encoder, err = ec.LookupEncoder(data.Elem().Type())
+	} else {
+		encoder, err = ec.LookupEncoder(nil)
+	}
+	if err != nil {
+		return err
+	}
+	return encoder.EncodeValue(ec, vw, data.Elem())
+}
+
+// JavaScriptEncodeValue is the ValueEncoderFunc for the primitive.JavaScript type.
+func (DefaultValueEncoders) JavaScriptEncodeValue(ectx EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tJavaScript {
+		return ValueEncoderError{Name: "JavaScriptEncodeValue", Types: []reflect.Type{tJavaScript}, Received: val}
+	}
+
+	return vw.WriteJavascript(val.String())
+}
+
+// SymbolEncodeValue is the ValueEncoderFunc for the primitive.Symbol type.
+func (DefaultValueEncoders) SymbolEncodeValue(ectx EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tSymbol {
+		return ValueEncoderError{Name: "SymbolEncodeValue", Types: []reflect.Type{tSymbol}, Received: val}
+	}
+
+	return vw.WriteSymbol(val.String())
+}
+
+// BinaryEncodeValue is the ValueEncoderFunc for Binary.
+func (DefaultValueEncoders) BinaryEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tBinary {
+		return ValueEncoderError{Name: "BinaryEncodeValue", Types: []reflect.Type{tBinary}, Received: val}
+	}
+	b := val.Interface().(primitive.Binary)
+
+	return vw.WriteBinaryWithSubtype(b.Data, b.Subtype)
+}
+
+// UndefinedEncodeValue is the ValueEncoderFunc for Undefined.
+func (DefaultValueEncoders) UndefinedEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tUndefined {
+		return ValueEncoderError{Name: "UndefinedEncodeValue", Types: []reflect.Type{tUndefined}, Received: val}
+	}
+
+	return vw.WriteUndefined()
+}
+
+// DateTimeEncodeValue is the ValueEncoderFunc for DateTime.
+func (DefaultValueEncoders) DateTimeEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tDateTime {
+		return ValueEncoderError{Name: "DateTimeEncodeValue", Types: []reflect.Type{tDateTime}, Received: val}
+	}
+
+	return vw.WriteDateTime(val.Int())
+}
+
+// NullEncodeValue is the ValueEncoderFunc for Null.
+func (DefaultValueEncoders) NullEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tNull {
+		return ValueEncoderError{Name: "NullEncodeValue", Types: []reflect.Type{tNull}, Received: val}
+	}
+
+	return vw.WriteNull()
+}
+
+// RegexEncodeValue is the ValueEncoderFunc for Regex.
+func (DefaultValueEncoders) RegexEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tRegex {
+		return ValueEncoderError{Name: "RegexEncodeValue", Types: []reflect.Type{tRegex}, Received: val}
+	}
+
+	regex := val.Interface().(primitive.Regex)
+
+	return vw.WriteRegex(regex.Pattern, regex.Options)
+}
+
+// DBPointerEncodeValue is the ValueEncoderFunc for DBPointer.
+func (DefaultValueEncoders) DBPointerEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tDBPointer {
+		return ValueEncoderError{Name: "DBPointerEncodeValue", Types: []reflect.Type{tDBPointer}, Received: val}
+	}
+
+	dbp := val.Interface().(primitive.DBPointer)
+
+	return vw.WriteDBPointer(dbp.DB, dbp.Pointer)
+}
+
+// TimestampEncodeValue is the ValueEncoderFunc for Timestamp.
+func (DefaultValueEncoders) TimestampEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tTimestamp {
+		return ValueEncoderError{Name: "TimestampEncodeValue", Types: []reflect.Type{tTimestamp}, Received: val}
+	}
+
+	ts := val.Interface().(primitive.Timestamp)
+
+	return vw.WriteTimestamp(ts.T, ts.I)
+}
+
+// MinKeyEncodeValue is the ValueEncoderFunc for MinKey.
+func (DefaultValueEncoders) MinKeyEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tMinKey {
+		return ValueEncoderError{Name: "MinKeyEncodeValue", Types: []reflect.Type{tMinKey}, Received: val}
+	}
+
+	return vw.WriteMinKey()
+}
+
+// MaxKeyEncodeValue is the ValueEncoderFunc for MaxKey.
+func (DefaultValueEncoders) MaxKeyEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tMaxKey {
+		return ValueEncoderError{Name: "MaxKeyEncodeValue", Types: []reflect.Type{tMaxKey}, Received: val}
+	}
+
+	return vw.WriteMaxKey()
+}
+
+// CoreDocumentEncodeValue is the ValueEncoderFunc for bsoncore.Document.
+func (DefaultValueEncoders) CoreDocumentEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tCoreDocument {
+		return ValueEncoderError{Name: "CoreDocumentEncodeValue", Types: []reflect.Type{tCoreDocument}, Received: val}
+	}
+
+	cdoc := val.Interface().(bsoncore.Document)
+
+	return bsonrw.Copier{}.CopyDocumentFromBytes(vw, cdoc)
+}
+
+// CodeWithScopeEncodeValue is the ValueEncoderFunc for CodeWithScope.
+func (dve DefaultValueEncoders) CodeWithScopeEncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tCodeWithScope {
+		return ValueEncoderError{Name: "CodeWithScopeEncodeValue", Types: []reflect.Type{tCodeWithScope}, Received: val}
+	}
+
+	cws := val.Interface().(primitive.CodeWithScope)
+
+	dw, err := vw.WriteCodeWithScope(string(cws.Code))
+	if err != nil {
+		return err
+	}
+
+	sw := sliceWriterPool.Get().(*bsonrw.SliceWriter)
+	defer sliceWriterPool.Put(sw)
+	*sw = (*sw)[:0]
+
+	scopeVW := bvwPool.Get(sw)
+	defer bvwPool.Put(scopeVW)
+
+	encoder, err := ec.LookupEncoder(reflect.TypeOf(cws.Scope))
+	if err != nil {
+		return err
+	}
+
+	err = encoder.EncodeValue(ec, scopeVW, reflect.ValueOf(cws.Scope))
+	if err != nil {
+		return err
+	}
+
+	err = bsonrw.Copier{}.CopyBytesToDocumentWriter(dw, *sw)
+	if err != nil {
+		return err
+	}
+	return dw.WriteDocumentEnd()
+}
+
+// isImplementationNil returns if val is a nil pointer and inter is implemented on a concrete type
+func isImplementationNil(val reflect.Value, inter reflect.Type) bool {
+	vt := val.Type()
+	for vt.Kind() == reflect.Ptr {
+		vt = vt.Elem()
+	}
+	return vt.Implements(inter) && val.Kind() == reflect.Ptr && val.IsNil()
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/doc.go

@@ -0,0 +1,90 @@
+// Copyright (C) MongoDB, Inc. 2022-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+// Package bsoncodec provides a system for encoding values to BSON representations and decoding
+// values from BSON representations. This package considers both binary BSON and ExtendedJSON as
+// BSON representations. The types in this package enable a flexible system for handling this
+// encoding and decoding.
+//
+// The codec system is composed of two parts:
+//
+// 1) ValueEncoders and ValueDecoders that handle encoding and decoding Go values to and from BSON
+// representations.
+//
+// 2) A Registry that holds these ValueEncoders and ValueDecoders and provides methods for
+// retrieving them.
+//
+// # ValueEncoders and ValueDecoders
+//
+// The ValueEncoder interface is implemented by types that can encode a provided Go type to BSON.
+// The value to encode is provided as a reflect.Value and a bsonrw.ValueWriter is used within the
+// EncodeValue method to actually create the BSON representation. For convenience, ValueEncoderFunc
+// is provided to allow use of a function with the correct signature as a ValueEncoder. An
+// EncodeContext instance is provided to allow implementations to lookup further ValueEncoders and
+// to provide configuration information.
+//
+// The ValueDecoder interface is the inverse of the ValueEncoder. Implementations should ensure that
+// the value they receive is settable. Similar to ValueEncoderFunc, ValueDecoderFunc is provided to
+// allow the use of a function with the correct signature as a ValueDecoder. A DecodeContext
+// instance is provided and serves similar functionality to the EncodeContext.
+//
+// # Registry and RegistryBuilder
+//
+// A Registry is an immutable store for ValueEncoders, ValueDecoders, and a type map. See the Registry type
+// documentation for examples of registering various custom encoders and decoders. A Registry can be constructed using a
+// RegistryBuilder, which handles three main types of codecs:
+//
+// 1. Type encoders/decoders - These can be registered using the RegisterTypeEncoder and RegisterTypeDecoder methods.
+// The registered codec will be invoked when encoding/decoding a value whose type matches the registered type exactly.
+// If the registered type is an interface, the codec will be invoked when encoding or decoding values whose type is the
+// interface, but not for values with concrete types that implement the interface.
+//
+// 2. Hook encoders/decoders - These can be registered using the RegisterHookEncoder and RegisterHookDecoder methods.
+// These methods only accept interface types and the registered codecs will be invoked when encoding or decoding values
+// whose types implement the interface. An example of a hook defined by the driver is bson.Marshaler. The driver will
+// call the MarshalBSON method for any value whose type implements bson.Marshaler, regardless of the value's concrete
+// type.
+//
+// 3. Type map entries - This can be used to associate a BSON type with a Go type. These type associations are used when
+// decoding into a bson.D/bson.M or a struct field of type interface{}. For example, by default, BSON int32 and int64
+// values decode as Go int32 and int64 instances, respectively, when decoding into a bson.D. The following code would
+// change the behavior so these values decode as Go int instances instead:
+//
+//	intType := reflect.TypeOf(int(0))
+//	registryBuilder.RegisterTypeMapEntry(bsontype.Int32, intType).RegisterTypeMapEntry(bsontype.Int64, intType)
+//
+// 4. Kind encoder/decoders - These can be registered using the RegisterDefaultEncoder and RegisterDefaultDecoder
+// methods. The registered codec will be invoked when encoding or decoding values whose reflect.Kind matches the
+// registered reflect.Kind as long as the value's type doesn't match a registered type or hook encoder/decoder first.
+// These methods should be used to change the behavior for all values for a specific kind.
+//
+// # Registry Lookup Procedure
+//
+// When looking up an encoder in a Registry, the precedence rules are as follows:
+//
+// 1. A type encoder registered for the exact type of the value.
+//
+// 2. A hook encoder registered for an interface that is implemented by the value or by a pointer to the value. If the
+// value matches multiple hooks (e.g. the type implements bsoncodec.Marshaler and bsoncodec.ValueMarshaler), the first
+// one registered will be selected. Note that registries constructed using bson.NewRegistryBuilder have driver-defined
+// hooks registered for the bsoncodec.Marshaler, bsoncodec.ValueMarshaler, and bsoncodec.Proxy interfaces, so those
+// will take precedence over any new hooks.
+//
+// 3. A kind encoder registered for the value's kind.
+//
+// If all of these lookups fail to find an encoder, an error of type ErrNoEncoder is returned. The same precedence
+// rules apply for decoders, with the exception that an error of type ErrNoDecoder will be returned if no decoder is
+// found.
+//
+// # DefaultValueEncoders and DefaultValueDecoders
+//
+// The DefaultValueEncoders and DefaultValueDecoders types provide a full set of ValueEncoders and
+// ValueDecoders for handling a wide range of Go types, including all of the types within the
+// primitive package. To make registering these codecs easier, a helper method on each type is
+// provided. For the DefaultValueEncoders type the method is called RegisterDefaultEncoders and for
+// the DefaultValueDecoders type the method is called RegisterDefaultDecoders, this method also
+// handles registering type map entries for each BSON type.
+package bsoncodec

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/empty_interface_codec.go

@@ -0,0 +1,147 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"reflect"
+
+	"go.mongodb.org/mongo-driver/bson/bsonoptions"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
+// EmptyInterfaceCodec is the Codec used for interface{} values.
+type EmptyInterfaceCodec struct {
+	DecodeBinaryAsSlice bool
+}
+
+var (
+	defaultEmptyInterfaceCodec = NewEmptyInterfaceCodec()
+
+	_ ValueCodec  = defaultEmptyInterfaceCodec
+	_ typeDecoder = defaultEmptyInterfaceCodec
+)
+
+// NewEmptyInterfaceCodec returns a EmptyInterfaceCodec with options opts.
+func NewEmptyInterfaceCodec(opts ...*bsonoptions.EmptyInterfaceCodecOptions) *EmptyInterfaceCodec {
+	interfaceOpt := bsonoptions.MergeEmptyInterfaceCodecOptions(opts...)
+
+	codec := EmptyInterfaceCodec{}
+	if interfaceOpt.DecodeBinaryAsSlice != nil {
+		codec.DecodeBinaryAsSlice = *interfaceOpt.DecodeBinaryAsSlice
+	}
+	return &codec
+}
+
+// EncodeValue is the ValueEncoderFunc for interface{}.
+func (eic EmptyInterfaceCodec) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tEmpty {
+		return ValueEncoderError{Name: "EmptyInterfaceEncodeValue", Types: []reflect.Type{tEmpty}, Received: val}
+	}
+
+	if val.IsNil() {
+		return vw.WriteNull()
+	}
+	encoder, err := ec.LookupEncoder(val.Elem().Type())
+	if err != nil {
+		return err
+	}
+
+	return encoder.EncodeValue(ec, vw, val.Elem())
+}
+
+func (eic EmptyInterfaceCodec) getEmptyInterfaceDecodeType(dc DecodeContext, valueType bsontype.Type) (reflect.Type, error) {
+	isDocument := valueType == bsontype.Type(0) || valueType == bsontype.EmbeddedDocument
+	if isDocument {
+		if dc.defaultDocumentType != nil {
+			// If the bsontype is an embedded document and the DocumentType is set on the DecodeContext, then return
+			// that type.
+			return dc.defaultDocumentType, nil
+		}
+		if dc.Ancestor != nil {
+			// Using ancestor information rather than looking up the type map entry forces consistent decoding.
+			// If we're decoding into a bson.D, subdocuments should also be decoded as bson.D, even if a type map entry
+			// has been registered.
+			return dc.Ancestor, nil
+		}
+	}
+
+	rtype, err := dc.LookupTypeMapEntry(valueType)
+	if err == nil {
+		return rtype, nil
+	}
+
+	if isDocument {
+		// For documents, fallback to looking up a type map entry for bsontype.Type(0) or bsontype.EmbeddedDocument,
+		// depending on the original valueType.
+		var lookupType bsontype.Type
+		switch valueType {
+		case bsontype.Type(0):
+			lookupType = bsontype.EmbeddedDocument
+		case bsontype.EmbeddedDocument:
+			lookupType = bsontype.Type(0)
+		}
+
+		rtype, err = dc.LookupTypeMapEntry(lookupType)
+		if err == nil {
+			return rtype, nil
+		}
+	}
+
+	return nil, err
+}
+
+func (eic EmptyInterfaceCodec) decodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+	if t != tEmpty {
+		return emptyValue, ValueDecoderError{Name: "EmptyInterfaceDecodeValue", Types: []reflect.Type{tEmpty}, Received: reflect.Zero(t)}
+	}
+
+	rtype, err := eic.getEmptyInterfaceDecodeType(dc, vr.Type())
+	if err != nil {
+		switch vr.Type() {
+		case bsontype.Null:
+			return reflect.Zero(t), vr.ReadNull()
+		default:
+			return emptyValue, err
+		}
+	}
+
+	decoder, err := dc.LookupDecoder(rtype)
+	if err != nil {
+		return emptyValue, err
+	}
+
+	elem, err := decodeTypeOrValue(decoder, dc, vr, rtype)
+	if err != nil {
+		return emptyValue, err
+	}
+
+	if eic.DecodeBinaryAsSlice && rtype == tBinary {
+		binElem := elem.Interface().(primitive.Binary)
+		if binElem.Subtype == bsontype.BinaryGeneric || binElem.Subtype == bsontype.BinaryBinaryOld {
+			elem = reflect.ValueOf(binElem.Data)
+		}
+	}
+
+	return elem, nil
+}
+
+// DecodeValue is the ValueDecoderFunc for interface{}.
+func (eic EmptyInterfaceCodec) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if !val.CanSet() || val.Type() != tEmpty {
+		return ValueDecoderError{Name: "EmptyInterfaceDecodeValue", Types: []reflect.Type{tEmpty}, Received: val}
+	}
+
+	elem, err := eic.decodeType(dc, vr, val.Type())
+	if err != nil {
+		return err
+	}
+
+	val.Set(elem)
+	return nil
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/map_codec.go

@@ -0,0 +1,309 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"encoding"
+	"fmt"
+	"reflect"
+	"strconv"
+
+	"go.mongodb.org/mongo-driver/bson/bsonoptions"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+)
+
+var defaultMapCodec = NewMapCodec()
+
+// MapCodec is the Codec used for map values.
+type MapCodec struct {
+	DecodeZerosMap         bool
+	EncodeNilAsEmpty       bool
+	EncodeKeysWithStringer bool
+}
+
+var _ ValueCodec = &MapCodec{}
+
+// KeyMarshaler is the interface implemented by an object that can marshal itself into a string key.
+// This applies to types used as map keys and is similar to encoding.TextMarshaler.
+type KeyMarshaler interface {
+	MarshalKey() (key string, err error)
+}
+
+// KeyUnmarshaler is the interface implemented by an object that can unmarshal a string representation
+// of itself. This applies to types used as map keys and is similar to encoding.TextUnmarshaler.
+//
+// UnmarshalKey must be able to decode the form generated by MarshalKey.
+// UnmarshalKey must copy the text if it wishes to retain the text
+// after returning.
+type KeyUnmarshaler interface {
+	UnmarshalKey(key string) error
+}
+
+// NewMapCodec returns a MapCodec with options opts.
+func NewMapCodec(opts ...*bsonoptions.MapCodecOptions) *MapCodec {
+	mapOpt := bsonoptions.MergeMapCodecOptions(opts...)
+
+	codec := MapCodec{}
+	if mapOpt.DecodeZerosMap != nil {
+		codec.DecodeZerosMap = *mapOpt.DecodeZerosMap
+	}
+	if mapOpt.EncodeNilAsEmpty != nil {
+		codec.EncodeNilAsEmpty = *mapOpt.EncodeNilAsEmpty
+	}
+	if mapOpt.EncodeKeysWithStringer != nil {
+		codec.EncodeKeysWithStringer = *mapOpt.EncodeKeysWithStringer
+	}
+	return &codec
+}
+
+// EncodeValue is the ValueEncoder for map[*]* types.
+func (mc *MapCodec) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Kind() != reflect.Map {
+		return ValueEncoderError{Name: "MapEncodeValue", Kinds: []reflect.Kind{reflect.Map}, Received: val}
+	}
+
+	if val.IsNil() && !mc.EncodeNilAsEmpty {
+		// If we have a nil map but we can't WriteNull, that means we're probably trying to encode
+		// to a TopLevel document. We can't currently tell if this is what actually happened, but if
+		// there's a deeper underlying problem, the error will also be returned from WriteDocument,
+		// so just continue. The operations on a map reflection value are valid, so we can call
+		// MapKeys within mapEncodeValue without a problem.
+		err := vw.WriteNull()
+		if err == nil {
+			return nil
+		}
+	}
+
+	dw, err := vw.WriteDocument()
+	if err != nil {
+		return err
+	}
+
+	return mc.mapEncodeValue(ec, dw, val, nil)
+}
+
+// mapEncodeValue handles encoding of the values of a map. The collisionFn returns
+// true if the provided key exists, this is mainly used for inline maps in the
+// struct codec.
+func (mc *MapCodec) mapEncodeValue(ec EncodeContext, dw bsonrw.DocumentWriter, val reflect.Value, collisionFn func(string) bool) error {
+
+	elemType := val.Type().Elem()
+	encoder, err := ec.LookupEncoder(elemType)
+	if err != nil && elemType.Kind() != reflect.Interface {
+		return err
+	}
+
+	keys := val.MapKeys()
+	for _, key := range keys {
+		keyStr, err := mc.encodeKey(key)
+		if err != nil {
+			return err
+		}
+
+		if collisionFn != nil && collisionFn(keyStr) {
+			return fmt.Errorf("Key %s of inlined map conflicts with a struct field name", key)
+		}
+
+		currEncoder, currVal, lookupErr := defaultValueEncoders.lookupElementEncoder(ec, encoder, val.MapIndex(key))
+		if lookupErr != nil && lookupErr != errInvalidValue {
+			return lookupErr
+		}
+
+		vw, err := dw.WriteDocumentElement(keyStr)
+		if err != nil {
+			return err
+		}
+
+		if lookupErr == errInvalidValue {
+			err = vw.WriteNull()
+			if err != nil {
+				return err
+			}
+			continue
+		}
+
+		err = currEncoder.EncodeValue(ec, vw, currVal)
+		if err != nil {
+			return err
+		}
+	}
+
+	return dw.WriteDocumentEnd()
+}
+
+// DecodeValue is the ValueDecoder for map[string/decimal]* types.
+func (mc *MapCodec) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if val.Kind() != reflect.Map || (!val.CanSet() && val.IsNil()) {
+		return ValueDecoderError{Name: "MapDecodeValue", Kinds: []reflect.Kind{reflect.Map}, Received: val}
+	}
+
+	switch vrType := vr.Type(); vrType {
+	case bsontype.Type(0), bsontype.EmbeddedDocument:
+	case bsontype.Null:
+		val.Set(reflect.Zero(val.Type()))
+		return vr.ReadNull()
+	case bsontype.Undefined:
+		val.Set(reflect.Zero(val.Type()))
+		return vr.ReadUndefined()
+	default:
+		return fmt.Errorf("cannot decode %v into a %s", vrType, val.Type())
+	}
+
+	dr, err := vr.ReadDocument()
+	if err != nil {
+		return err
+	}
+
+	if val.IsNil() {
+		val.Set(reflect.MakeMap(val.Type()))
+	}
+
+	if val.Len() > 0 && mc.DecodeZerosMap {
+		clearMap(val)
+	}
+
+	eType := val.Type().Elem()
+	decoder, err := dc.LookupDecoder(eType)
+	if err != nil {
+		return err
+	}
+	eTypeDecoder, _ := decoder.(typeDecoder)
+
+	if eType == tEmpty {
+		dc.Ancestor = val.Type()
+	}
+
+	keyType := val.Type().Key()
+
+	for {
+		key, vr, err := dr.ReadElement()
+		if err == bsonrw.ErrEOD {
+			break
+		}
+		if err != nil {
+			return err
+		}
+
+		k, err := mc.decodeKey(key, keyType)
+		if err != nil {
+			return err
+		}
+
+		elem, err := decodeTypeOrValueWithInfo(decoder, eTypeDecoder, dc, vr, eType, true)
+		if err != nil {
+			return newDecodeError(key, err)
+		}
+
+		val.SetMapIndex(k, elem)
+	}
+	return nil
+}
+
+func clearMap(m reflect.Value) {
+	var none reflect.Value
+	for _, k := range m.MapKeys() {
+		m.SetMapIndex(k, none)
+	}
+}
+
+func (mc *MapCodec) encodeKey(val reflect.Value) (string, error) {
+	if mc.EncodeKeysWithStringer {
+		return fmt.Sprint(val), nil
+	}
+
+	// keys of any string type are used directly
+	if val.Kind() == reflect.String {
+		return val.String(), nil
+	}
+	// KeyMarshalers are marshaled
+	if km, ok := val.Interface().(KeyMarshaler); ok {
+		if val.Kind() == reflect.Ptr && val.IsNil() {
+			return "", nil
+		}
+		buf, err := km.MarshalKey()
+		if err == nil {
+			return buf, nil
+		}
+		return "", err
+	}
+	// keys implement encoding.TextMarshaler are marshaled.
+	if km, ok := val.Interface().(encoding.TextMarshaler); ok {
+		if val.Kind() == reflect.Ptr && val.IsNil() {
+			return "", nil
+		}
+
+		buf, err := km.MarshalText()
+		if err != nil {
+			return "", err
+		}
+
+		return string(buf), nil
+	}
+
+	switch val.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return strconv.FormatInt(val.Int(), 10), nil
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return strconv.FormatUint(val.Uint(), 10), nil
+	}
+	return "", fmt.Errorf("unsupported key type: %v", val.Type())
+}
+
+var keyUnmarshalerType = reflect.TypeOf((*KeyUnmarshaler)(nil)).Elem()
+var textUnmarshalerType = reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()
+
+func (mc *MapCodec) decodeKey(key string, keyType reflect.Type) (reflect.Value, error) {
+	keyVal := reflect.ValueOf(key)
+	var err error
+	switch {
+	// First, if EncodeKeysWithStringer is not enabled, try to decode withKeyUnmarshaler
+	case !mc.EncodeKeysWithStringer && reflect.PtrTo(keyType).Implements(keyUnmarshalerType):
+		keyVal = reflect.New(keyType)
+		v := keyVal.Interface().(KeyUnmarshaler)
+		err = v.UnmarshalKey(key)
+		keyVal = keyVal.Elem()
+	// Try to decode encoding.TextUnmarshalers.
+	case reflect.PtrTo(keyType).Implements(textUnmarshalerType):
+		keyVal = reflect.New(keyType)
+		v := keyVal.Interface().(encoding.TextUnmarshaler)
+		err = v.UnmarshalText([]byte(key))
+		keyVal = keyVal.Elem()
+	// Otherwise, go to type specific behavior
+	default:
+		switch keyType.Kind() {
+		case reflect.String:
+			keyVal = reflect.ValueOf(key).Convert(keyType)
+		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+			n, parseErr := strconv.ParseInt(key, 10, 64)
+			if parseErr != nil || reflect.Zero(keyType).OverflowInt(n) {
+				err = fmt.Errorf("failed to unmarshal number key %v", key)
+			}
+			keyVal = reflect.ValueOf(n).Convert(keyType)
+		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+			n, parseErr := strconv.ParseUint(key, 10, 64)
+			if parseErr != nil || reflect.Zero(keyType).OverflowUint(n) {
+				err = fmt.Errorf("failed to unmarshal number key %v", key)
+				break
+			}
+			keyVal = reflect.ValueOf(n).Convert(keyType)
+		case reflect.Float32, reflect.Float64:
+			if mc.EncodeKeysWithStringer {
+				parsed, err := strconv.ParseFloat(key, 64)
+				if err != nil {
+					return keyVal, fmt.Errorf("Map key is defined to be a decimal type (%v) but got error %v", keyType.Kind(), err)
+				}
+				keyVal = reflect.ValueOf(parsed)
+				break
+			}
+			fallthrough
+		default:
+			return keyVal, fmt.Errorf("unsupported key type: %v", keyType)
+		}
+	}
+	return keyVal, err
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/mode.go

@@ -0,0 +1,65 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import "fmt"
+
+type mode int
+
+const (
+	_ mode = iota
+	mTopLevel
+	mDocument
+	mArray
+	mValue
+	mElement
+	mCodeWithScope
+	mSpacer
+)
+
+func (m mode) String() string {
+	var str string
+
+	switch m {
+	case mTopLevel:
+		str = "TopLevel"
+	case mDocument:
+		str = "DocumentMode"
+	case mArray:
+		str = "ArrayMode"
+	case mValue:
+		str = "ValueMode"
+	case mElement:
+		str = "ElementMode"
+	case mCodeWithScope:
+		str = "CodeWithScopeMode"
+	case mSpacer:
+		str = "CodeWithScopeSpacerFrame"
+	default:
+		str = "UnknownMode"
+	}
+
+	return str
+}
+
+// TransitionError is an error returned when an invalid progressing a
+// ValueReader or ValueWriter state machine occurs.
+type TransitionError struct {
+	parent      mode
+	current     mode
+	destination mode
+}
+
+func (te TransitionError) Error() string {
+	if te.destination == mode(0) {
+		return fmt.Sprintf("invalid state transition: cannot read/write value while in %s", te.current)
+	}
+	if te.parent == mode(0) {
+		return fmt.Sprintf("invalid state transition: %s -> %s", te.current, te.destination)
+	}
+	return fmt.Sprintf("invalid state transition: %s -> %s; parent %s", te.current, te.destination, te.parent)
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/pointer_codec.go

@@ -0,0 +1,109 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"reflect"
+	"sync"
+
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+)
+
+var _ ValueEncoder = &PointerCodec{}
+var _ ValueDecoder = &PointerCodec{}
+
+// PointerCodec is the Codec used for pointers.
+type PointerCodec struct {
+	ecache map[reflect.Type]ValueEncoder
+	dcache map[reflect.Type]ValueDecoder
+	l      sync.RWMutex
+}
+
+// NewPointerCodec returns a PointerCodec that has been initialized.
+func NewPointerCodec() *PointerCodec {
+	return &PointerCodec{
+		ecache: make(map[reflect.Type]ValueEncoder),
+		dcache: make(map[reflect.Type]ValueDecoder),
+	}
+}
+
+// EncodeValue handles encoding a pointer by either encoding it to BSON Null if the pointer is nil
+// or looking up an encoder for the type of value the pointer points to.
+func (pc *PointerCodec) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if val.Kind() != reflect.Ptr {
+		if !val.IsValid() {
+			return vw.WriteNull()
+		}
+		return ValueEncoderError{Name: "PointerCodec.EncodeValue", Kinds: []reflect.Kind{reflect.Ptr}, Received: val}
+	}
+
+	if val.IsNil() {
+		return vw.WriteNull()
+	}
+
+	pc.l.RLock()
+	enc, ok := pc.ecache[val.Type()]
+	pc.l.RUnlock()
+	if ok {
+		if enc == nil {
+			return ErrNoEncoder{Type: val.Type()}
+		}
+		return enc.EncodeValue(ec, vw, val.Elem())
+	}
+
+	enc, err := ec.LookupEncoder(val.Type().Elem())
+	pc.l.Lock()
+	pc.ecache[val.Type()] = enc
+	pc.l.Unlock()
+	if err != nil {
+		return err
+	}
+
+	return enc.EncodeValue(ec, vw, val.Elem())
+}
+
+// DecodeValue handles decoding a pointer by looking up a decoder for the type it points to and
+// using that to decode. If the BSON value is Null, this method will set the pointer to nil.
+func (pc *PointerCodec) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if !val.CanSet() || val.Kind() != reflect.Ptr {
+		return ValueDecoderError{Name: "PointerCodec.DecodeValue", Kinds: []reflect.Kind{reflect.Ptr}, Received: val}
+	}
+
+	if vr.Type() == bsontype.Null {
+		val.Set(reflect.Zero(val.Type()))
+		return vr.ReadNull()
+	}
+	if vr.Type() == bsontype.Undefined {
+		val.Set(reflect.Zero(val.Type()))
+		return vr.ReadUndefined()
+	}
+
+	if val.IsNil() {
+		val.Set(reflect.New(val.Type().Elem()))
+	}
+
+	pc.l.RLock()
+	dec, ok := pc.dcache[val.Type()]
+	pc.l.RUnlock()
+	if ok {
+		if dec == nil {
+			return ErrNoDecoder{Type: val.Type()}
+		}
+		return dec.DecodeValue(dc, vr, val.Elem())
+	}
+
+	dec, err := dc.LookupDecoder(val.Type().Elem())
+	pc.l.Lock()
+	pc.dcache[val.Type()] = dec
+	pc.l.Unlock()
+	if err != nil {
+		return err
+	}
+
+	return dec.DecodeValue(dc, vr, val.Elem())
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/proxy.go

@@ -0,0 +1,14 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+// Proxy is an interface implemented by types that cannot themselves be directly encoded. Types
+// that implement this interface with have ProxyBSON called during the encoding process and that
+// value will be encoded in place for the implementer.
+type Proxy interface {
+	ProxyBSON() (interface{}, error)
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/registry.go

@@ -0,0 +1,469 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"sync"
+
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+)
+
+// ErrNilType is returned when nil is passed to either LookupEncoder or LookupDecoder.
+var ErrNilType = errors.New("cannot perform a decoder lookup on <nil>")
+
+// ErrNotPointer is returned when a non-pointer type is provided to LookupDecoder.
+var ErrNotPointer = errors.New("non-pointer provided to LookupDecoder")
+
+// ErrNoEncoder is returned when there wasn't an encoder available for a type.
+type ErrNoEncoder struct {
+	Type reflect.Type
+}
+
+func (ene ErrNoEncoder) Error() string {
+	if ene.Type == nil {
+		return "no encoder found for <nil>"
+	}
+	return "no encoder found for " + ene.Type.String()
+}
+
+// ErrNoDecoder is returned when there wasn't a decoder available for a type.
+type ErrNoDecoder struct {
+	Type reflect.Type
+}
+
+func (end ErrNoDecoder) Error() string {
+	return "no decoder found for " + end.Type.String()
+}
+
+// ErrNoTypeMapEntry is returned when there wasn't a type available for the provided BSON type.
+type ErrNoTypeMapEntry struct {
+	Type bsontype.Type
+}
+
+func (entme ErrNoTypeMapEntry) Error() string {
+	return "no type map entry found for " + entme.Type.String()
+}
+
+// ErrNotInterface is returned when the provided type is not an interface.
+var ErrNotInterface = errors.New("The provided type is not an interface")
+
+// A RegistryBuilder is used to build a Registry. This type is not goroutine
+// safe.
+type RegistryBuilder struct {
+	typeEncoders      map[reflect.Type]ValueEncoder
+	interfaceEncoders []interfaceValueEncoder
+	kindEncoders      map[reflect.Kind]ValueEncoder
+
+	typeDecoders      map[reflect.Type]ValueDecoder
+	interfaceDecoders []interfaceValueDecoder
+	kindDecoders      map[reflect.Kind]ValueDecoder
+
+	typeMap map[bsontype.Type]reflect.Type
+}
+
+// A Registry is used to store and retrieve codecs for types and interfaces. This type is the main
+// typed passed around and Encoders and Decoders are constructed from it.
+type Registry struct {
+	typeEncoders map[reflect.Type]ValueEncoder
+	typeDecoders map[reflect.Type]ValueDecoder
+
+	interfaceEncoders []interfaceValueEncoder
+	interfaceDecoders []interfaceValueDecoder
+
+	kindEncoders map[reflect.Kind]ValueEncoder
+	kindDecoders map[reflect.Kind]ValueDecoder
+
+	typeMap map[bsontype.Type]reflect.Type
+
+	mu sync.RWMutex
+}
+
+// NewRegistryBuilder creates a new empty RegistryBuilder.
+func NewRegistryBuilder() *RegistryBuilder {
+	return &RegistryBuilder{
+		typeEncoders: make(map[reflect.Type]ValueEncoder),
+		typeDecoders: make(map[reflect.Type]ValueDecoder),
+
+		interfaceEncoders: make([]interfaceValueEncoder, 0),
+		interfaceDecoders: make([]interfaceValueDecoder, 0),
+
+		kindEncoders: make(map[reflect.Kind]ValueEncoder),
+		kindDecoders: make(map[reflect.Kind]ValueDecoder),
+
+		typeMap: make(map[bsontype.Type]reflect.Type),
+	}
+}
+
+func buildDefaultRegistry() *Registry {
+	rb := NewRegistryBuilder()
+	defaultValueEncoders.RegisterDefaultEncoders(rb)
+	defaultValueDecoders.RegisterDefaultDecoders(rb)
+	return rb.Build()
+}
+
+// RegisterCodec will register the provided ValueCodec for the provided type.
+func (rb *RegistryBuilder) RegisterCodec(t reflect.Type, codec ValueCodec) *RegistryBuilder {
+	rb.RegisterTypeEncoder(t, codec)
+	rb.RegisterTypeDecoder(t, codec)
+	return rb
+}
+
+// RegisterTypeEncoder will register the provided ValueEncoder for the provided type.
+//
+// The type will be used directly, so an encoder can be registered for a type and a different encoder can be registered
+// for a pointer to that type.
+//
+// If the given type is an interface, the encoder will be called when marshalling a type that is that interface. It
+// will not be called when marshalling a non-interface type that implements the interface.
+func (rb *RegistryBuilder) RegisterTypeEncoder(t reflect.Type, enc ValueEncoder) *RegistryBuilder {
+	rb.typeEncoders[t] = enc
+	return rb
+}
+
+// RegisterHookEncoder will register an encoder for the provided interface type t. This encoder will be called when
+// marshalling a type if the type implements t or a pointer to the type implements t. If the provided type is not
+// an interface (i.e. t.Kind() != reflect.Interface), this method will panic.
+func (rb *RegistryBuilder) RegisterHookEncoder(t reflect.Type, enc ValueEncoder) *RegistryBuilder {
+	if t.Kind() != reflect.Interface {
+		panicStr := fmt.Sprintf("RegisterHookEncoder expects a type with kind reflect.Interface, "+
+			"got type %s with kind %s", t, t.Kind())
+		panic(panicStr)
+	}
+
+	for idx, encoder := range rb.interfaceEncoders {
+		if encoder.i == t {
+			rb.interfaceEncoders[idx].ve = enc
+			return rb
+		}
+	}
+
+	rb.interfaceEncoders = append(rb.interfaceEncoders, interfaceValueEncoder{i: t, ve: enc})
+	return rb
+}
+
+// RegisterTypeDecoder will register the provided ValueDecoder for the provided type.
+//
+// The type will be used directly, so a decoder can be registered for a type and a different decoder can be registered
+// for a pointer to that type.
+//
+// If the given type is an interface, the decoder will be called when unmarshalling into a type that is that interface.
+// It will not be called when unmarshalling into a non-interface type that implements the interface.
+func (rb *RegistryBuilder) RegisterTypeDecoder(t reflect.Type, dec ValueDecoder) *RegistryBuilder {
+	rb.typeDecoders[t] = dec
+	return rb
+}
+
+// RegisterHookDecoder will register an decoder for the provided interface type t. This decoder will be called when
+// unmarshalling into a type if the type implements t or a pointer to the type implements t. If the provided type is not
+// an interface (i.e. t.Kind() != reflect.Interface), this method will panic.
+func (rb *RegistryBuilder) RegisterHookDecoder(t reflect.Type, dec ValueDecoder) *RegistryBuilder {
+	if t.Kind() != reflect.Interface {
+		panicStr := fmt.Sprintf("RegisterHookDecoder expects a type with kind reflect.Interface, "+
+			"got type %s with kind %s", t, t.Kind())
+		panic(panicStr)
+	}
+
+	for idx, decoder := range rb.interfaceDecoders {
+		if decoder.i == t {
+			rb.interfaceDecoders[idx].vd = dec
+			return rb
+		}
+	}
+
+	rb.interfaceDecoders = append(rb.interfaceDecoders, interfaceValueDecoder{i: t, vd: dec})
+	return rb
+}
+
+// RegisterEncoder registers the provided type and encoder pair.
+//
+// Deprecated: Use RegisterTypeEncoder or RegisterHookEncoder instead.
+func (rb *RegistryBuilder) RegisterEncoder(t reflect.Type, enc ValueEncoder) *RegistryBuilder {
+	if t == tEmpty {
+		rb.typeEncoders[t] = enc
+		return rb
+	}
+	switch t.Kind() {
+	case reflect.Interface:
+		for idx, ir := range rb.interfaceEncoders {
+			if ir.i == t {
+				rb.interfaceEncoders[idx].ve = enc
+				return rb
+			}
+		}
+
+		rb.interfaceEncoders = append(rb.interfaceEncoders, interfaceValueEncoder{i: t, ve: enc})
+	default:
+		rb.typeEncoders[t] = enc
+	}
+	return rb
+}
+
+// RegisterDecoder registers the provided type and decoder pair.
+//
+// Deprecated: Use RegisterTypeDecoder or RegisterHookDecoder instead.
+func (rb *RegistryBuilder) RegisterDecoder(t reflect.Type, dec ValueDecoder) *RegistryBuilder {
+	if t == nil {
+		rb.typeDecoders[nil] = dec
+		return rb
+	}
+	if t == tEmpty {
+		rb.typeDecoders[t] = dec
+		return rb
+	}
+	switch t.Kind() {
+	case reflect.Interface:
+		for idx, ir := range rb.interfaceDecoders {
+			if ir.i == t {
+				rb.interfaceDecoders[idx].vd = dec
+				return rb
+			}
+		}
+
+		rb.interfaceDecoders = append(rb.interfaceDecoders, interfaceValueDecoder{i: t, vd: dec})
+	default:
+		rb.typeDecoders[t] = dec
+	}
+	return rb
+}
+
+// RegisterDefaultEncoder will registr the provided ValueEncoder to the provided
+// kind.
+func (rb *RegistryBuilder) RegisterDefaultEncoder(kind reflect.Kind, enc ValueEncoder) *RegistryBuilder {
+	rb.kindEncoders[kind] = enc
+	return rb
+}
+
+// RegisterDefaultDecoder will register the provided ValueDecoder to the
+// provided kind.
+func (rb *RegistryBuilder) RegisterDefaultDecoder(kind reflect.Kind, dec ValueDecoder) *RegistryBuilder {
+	rb.kindDecoders[kind] = dec
+	return rb
+}
+
+// RegisterTypeMapEntry will register the provided type to the BSON type. The primary usage for this
+// mapping is decoding situations where an empty interface is used and a default type needs to be
+// created and decoded into.
+//
+// By default, BSON documents will decode into interface{} values as bson.D. To change the default type for BSON
+// documents, a type map entry for bsontype.EmbeddedDocument should be registered. For example, to force BSON documents
+// to decode to bson.Raw, use the following code:
+//
+//	rb.RegisterTypeMapEntry(bsontype.EmbeddedDocument, reflect.TypeOf(bson.Raw{}))
+func (rb *RegistryBuilder) RegisterTypeMapEntry(bt bsontype.Type, rt reflect.Type) *RegistryBuilder {
+	rb.typeMap[bt] = rt
+	return rb
+}
+
+// Build creates a Registry from the current state of this RegistryBuilder.
+func (rb *RegistryBuilder) Build() *Registry {
+	registry := new(Registry)
+
+	registry.typeEncoders = make(map[reflect.Type]ValueEncoder)
+	for t, enc := range rb.typeEncoders {
+		registry.typeEncoders[t] = enc
+	}
+
+	registry.typeDecoders = make(map[reflect.Type]ValueDecoder)
+	for t, dec := range rb.typeDecoders {
+		registry.typeDecoders[t] = dec
+	}
+
+	registry.interfaceEncoders = make([]interfaceValueEncoder, len(rb.interfaceEncoders))
+	copy(registry.interfaceEncoders, rb.interfaceEncoders)
+
+	registry.interfaceDecoders = make([]interfaceValueDecoder, len(rb.interfaceDecoders))
+	copy(registry.interfaceDecoders, rb.interfaceDecoders)
+
+	registry.kindEncoders = make(map[reflect.Kind]ValueEncoder)
+	for kind, enc := range rb.kindEncoders {
+		registry.kindEncoders[kind] = enc
+	}
+
+	registry.kindDecoders = make(map[reflect.Kind]ValueDecoder)
+	for kind, dec := range rb.kindDecoders {
+		registry.kindDecoders[kind] = dec
+	}
+
+	registry.typeMap = make(map[bsontype.Type]reflect.Type)
+	for bt, rt := range rb.typeMap {
+		registry.typeMap[bt] = rt
+	}
+
+	return registry
+}
+
+// LookupEncoder inspects the registry for an encoder for the given type. The lookup precedence works as follows:
+//
+// 1. An encoder registered for the exact type. If the given type represents an interface, an encoder registered using
+// RegisterTypeEncoder for the interface will be selected.
+//
+// 2. An encoder registered using RegisterHookEncoder for an interface implemented by the type or by a pointer to the
+// type.
+//
+// 3. An encoder registered for the reflect.Kind of the value.
+//
+// If no encoder is found, an error of type ErrNoEncoder is returned.
+func (r *Registry) LookupEncoder(t reflect.Type) (ValueEncoder, error) {
+	encodererr := ErrNoEncoder{Type: t}
+	r.mu.RLock()
+	enc, found := r.lookupTypeEncoder(t)
+	r.mu.RUnlock()
+	if found {
+		if enc == nil {
+			return nil, ErrNoEncoder{Type: t}
+		}
+		return enc, nil
+	}
+
+	enc, found = r.lookupInterfaceEncoder(t, true)
+	if found {
+		r.mu.Lock()
+		r.typeEncoders[t] = enc
+		r.mu.Unlock()
+		return enc, nil
+	}
+
+	if t == nil {
+		r.mu.Lock()
+		r.typeEncoders[t] = nil
+		r.mu.Unlock()
+		return nil, encodererr
+	}
+
+	enc, found = r.kindEncoders[t.Kind()]
+	if !found {
+		r.mu.Lock()
+		r.typeEncoders[t] = nil
+		r.mu.Unlock()
+		return nil, encodererr
+	}
+
+	r.mu.Lock()
+	r.typeEncoders[t] = enc
+	r.mu.Unlock()
+	return enc, nil
+}
+
+func (r *Registry) lookupTypeEncoder(t reflect.Type) (ValueEncoder, bool) {
+	enc, found := r.typeEncoders[t]
+	return enc, found
+}
+
+func (r *Registry) lookupInterfaceEncoder(t reflect.Type, allowAddr bool) (ValueEncoder, bool) {
+	if t == nil {
+		return nil, false
+	}
+	for _, ienc := range r.interfaceEncoders {
+		if t.Implements(ienc.i) {
+			return ienc.ve, true
+		}
+		if allowAddr && t.Kind() != reflect.Ptr && reflect.PtrTo(t).Implements(ienc.i) {
+			// if *t implements an interface, this will catch if t implements an interface further ahead
+			// in interfaceEncoders
+			defaultEnc, found := r.lookupInterfaceEncoder(t, false)
+			if !found {
+				defaultEnc = r.kindEncoders[t.Kind()]
+			}
+			return newCondAddrEncoder(ienc.ve, defaultEnc), true
+		}
+	}
+	return nil, false
+}
+
+// LookupDecoder inspects the registry for an decoder for the given type. The lookup precedence works as follows:
+//
+// 1. A decoder registered for the exact type. If the given type represents an interface, a decoder registered using
+// RegisterTypeDecoder for the interface will be selected.
+//
+// 2. A decoder registered using RegisterHookDecoder for an interface implemented by the type or by a pointer to the
+// type.
+//
+// 3. A decoder registered for the reflect.Kind of the value.
+//
+// If no decoder is found, an error of type ErrNoDecoder is returned.
+func (r *Registry) LookupDecoder(t reflect.Type) (ValueDecoder, error) {
+	if t == nil {
+		return nil, ErrNilType
+	}
+	decodererr := ErrNoDecoder{Type: t}
+	r.mu.RLock()
+	dec, found := r.lookupTypeDecoder(t)
+	r.mu.RUnlock()
+	if found {
+		if dec == nil {
+			return nil, ErrNoDecoder{Type: t}
+		}
+		return dec, nil
+	}
+
+	dec, found = r.lookupInterfaceDecoder(t, true)
+	if found {
+		r.mu.Lock()
+		r.typeDecoders[t] = dec
+		r.mu.Unlock()
+		return dec, nil
+	}
+
+	dec, found = r.kindDecoders[t.Kind()]
+	if !found {
+		r.mu.Lock()
+		r.typeDecoders[t] = nil
+		r.mu.Unlock()
+		return nil, decodererr
+	}
+
+	r.mu.Lock()
+	r.typeDecoders[t] = dec
+	r.mu.Unlock()
+	return dec, nil
+}
+
+func (r *Registry) lookupTypeDecoder(t reflect.Type) (ValueDecoder, bool) {
+	dec, found := r.typeDecoders[t]
+	return dec, found
+}
+
+func (r *Registry) lookupInterfaceDecoder(t reflect.Type, allowAddr bool) (ValueDecoder, bool) {
+	for _, idec := range r.interfaceDecoders {
+		if t.Implements(idec.i) {
+			return idec.vd, true
+		}
+		if allowAddr && t.Kind() != reflect.Ptr && reflect.PtrTo(t).Implements(idec.i) {
+			// if *t implements an interface, this will catch if t implements an interface further ahead
+			// in interfaceDecoders
+			defaultDec, found := r.lookupInterfaceDecoder(t, false)
+			if !found {
+				defaultDec = r.kindDecoders[t.Kind()]
+			}
+			return newCondAddrDecoder(idec.vd, defaultDec), true
+		}
+	}
+	return nil, false
+}
+
+// LookupTypeMapEntry inspects the registry's type map for a Go type for the corresponding BSON
+// type. If no type is found, ErrNoTypeMapEntry is returned.
+func (r *Registry) LookupTypeMapEntry(bt bsontype.Type) (reflect.Type, error) {
+	t, ok := r.typeMap[bt]
+	if !ok || t == nil {
+		return nil, ErrNoTypeMapEntry{Type: bt}
+	}
+	return t, nil
+}
+
+type interfaceValueEncoder struct {
+	i  reflect.Type
+	ve ValueEncoder
+}
+
+type interfaceValueDecoder struct {
+	i  reflect.Type
+	vd ValueDecoder
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/slice_codec.go

@@ -0,0 +1,199 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"fmt"
+	"reflect"
+
+	"go.mongodb.org/mongo-driver/bson/bsonoptions"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
+var defaultSliceCodec = NewSliceCodec()
+
+// SliceCodec is the Codec used for slice values.
+type SliceCodec struct {
+	EncodeNilAsEmpty bool
+}
+
+var _ ValueCodec = &MapCodec{}
+
+// NewSliceCodec returns a MapCodec with options opts.
+func NewSliceCodec(opts ...*bsonoptions.SliceCodecOptions) *SliceCodec {
+	sliceOpt := bsonoptions.MergeSliceCodecOptions(opts...)
+
+	codec := SliceCodec{}
+	if sliceOpt.EncodeNilAsEmpty != nil {
+		codec.EncodeNilAsEmpty = *sliceOpt.EncodeNilAsEmpty
+	}
+	return &codec
+}
+
+// EncodeValue is the ValueEncoder for slice types.
+func (sc SliceCodec) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Kind() != reflect.Slice {
+		return ValueEncoderError{Name: "SliceEncodeValue", Kinds: []reflect.Kind{reflect.Slice}, Received: val}
+	}
+
+	if val.IsNil() && !sc.EncodeNilAsEmpty {
+		return vw.WriteNull()
+	}
+
+	// If we have a []byte we want to treat it as a binary instead of as an array.
+	if val.Type().Elem() == tByte {
+		var byteSlice []byte
+		for idx := 0; idx < val.Len(); idx++ {
+			byteSlice = append(byteSlice, val.Index(idx).Interface().(byte))
+		}
+		return vw.WriteBinary(byteSlice)
+	}
+
+	// If we have a []primitive.E we want to treat it as a document instead of as an array.
+	if val.Type().ConvertibleTo(tD) {
+		d := val.Convert(tD).Interface().(primitive.D)
+
+		dw, err := vw.WriteDocument()
+		if err != nil {
+			return err
+		}
+
+		for _, e := range d {
+			err = encodeElement(ec, dw, e)
+			if err != nil {
+				return err
+			}
+		}
+
+		return dw.WriteDocumentEnd()
+	}
+
+	aw, err := vw.WriteArray()
+	if err != nil {
+		return err
+	}
+
+	elemType := val.Type().Elem()
+	encoder, err := ec.LookupEncoder(elemType)
+	if err != nil && elemType.Kind() != reflect.Interface {
+		return err
+	}
+
+	for idx := 0; idx < val.Len(); idx++ {
+		currEncoder, currVal, lookupErr := defaultValueEncoders.lookupElementEncoder(ec, encoder, val.Index(idx))
+		if lookupErr != nil && lookupErr != errInvalidValue {
+			return lookupErr
+		}
+
+		vw, err := aw.WriteArrayElement()
+		if err != nil {
+			return err
+		}
+
+		if lookupErr == errInvalidValue {
+			err = vw.WriteNull()
+			if err != nil {
+				return err
+			}
+			continue
+		}
+
+		err = currEncoder.EncodeValue(ec, vw, currVal)
+		if err != nil {
+			return err
+		}
+	}
+	return aw.WriteArrayEnd()
+}
+
+// DecodeValue is the ValueDecoder for slice types.
+func (sc *SliceCodec) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if !val.CanSet() || val.Kind() != reflect.Slice {
+		return ValueDecoderError{Name: "SliceDecodeValue", Kinds: []reflect.Kind{reflect.Slice}, Received: val}
+	}
+
+	switch vrType := vr.Type(); vrType {
+	case bsontype.Array:
+	case bsontype.Null:
+		val.Set(reflect.Zero(val.Type()))
+		return vr.ReadNull()
+	case bsontype.Undefined:
+		val.Set(reflect.Zero(val.Type()))
+		return vr.ReadUndefined()
+	case bsontype.Type(0), bsontype.EmbeddedDocument:
+		if val.Type().Elem() != tE {
+			return fmt.Errorf("cannot decode document into %s", val.Type())
+		}
+	case bsontype.Binary:
+		if val.Type().Elem() != tByte {
+			return fmt.Errorf("SliceDecodeValue can only decode a binary into a byte array, got %v", vrType)
+		}
+		data, subtype, err := vr.ReadBinary()
+		if err != nil {
+			return err
+		}
+		if subtype != bsontype.BinaryGeneric && subtype != bsontype.BinaryBinaryOld {
+			return fmt.Errorf("SliceDecodeValue can only be used to decode subtype 0x00 or 0x02 for %s, got %v", bsontype.Binary, subtype)
+		}
+
+		if val.IsNil() {
+			val.Set(reflect.MakeSlice(val.Type(), 0, len(data)))
+		}
+
+		val.SetLen(0)
+		for _, elem := range data {
+			val.Set(reflect.Append(val, reflect.ValueOf(elem)))
+		}
+		return nil
+	case bsontype.String:
+		if sliceType := val.Type().Elem(); sliceType != tByte {
+			return fmt.Errorf("SliceDecodeValue can only decode a string into a byte array, got %v", sliceType)
+		}
+		str, err := vr.ReadString()
+		if err != nil {
+			return err
+		}
+		byteStr := []byte(str)
+
+		if val.IsNil() {
+			val.Set(reflect.MakeSlice(val.Type(), 0, len(byteStr)))
+		}
+
+		val.SetLen(0)
+		for _, elem := range byteStr {
+			val.Set(reflect.Append(val, reflect.ValueOf(elem)))
+		}
+		return nil
+	default:
+		return fmt.Errorf("cannot decode %v into a slice", vrType)
+	}
+
+	var elemsFunc func(DecodeContext, bsonrw.ValueReader, reflect.Value) ([]reflect.Value, error)
+	switch val.Type().Elem() {
+	case tE:
+		dc.Ancestor = val.Type()
+		elemsFunc = defaultValueDecoders.decodeD
+	default:
+		elemsFunc = defaultValueDecoders.decodeDefault
+	}
+
+	elems, err := elemsFunc(dc, vr, val)
+	if err != nil {
+		return err
+	}
+
+	if val.IsNil() {
+		val.Set(reflect.MakeSlice(val.Type(), 0, len(elems)))
+	}
+
+	val.SetLen(0)
+	val.Set(reflect.Append(val, elems...))
+
+	return nil
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/string_codec.go

@@ -0,0 +1,119 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"fmt"
+	"reflect"
+
+	"go.mongodb.org/mongo-driver/bson/bsonoptions"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+)
+
+// StringCodec is the Codec used for struct values.
+type StringCodec struct {
+	DecodeObjectIDAsHex bool
+}
+
+var (
+	defaultStringCodec = NewStringCodec()
+
+	_ ValueCodec  = defaultStringCodec
+	_ typeDecoder = defaultStringCodec
+)
+
+// NewStringCodec returns a StringCodec with options opts.
+func NewStringCodec(opts ...*bsonoptions.StringCodecOptions) *StringCodec {
+	stringOpt := bsonoptions.MergeStringCodecOptions(opts...)
+	return &StringCodec{*stringOpt.DecodeObjectIDAsHex}
+}
+
+// EncodeValue is the ValueEncoder for string types.
+func (sc *StringCodec) EncodeValue(ectx EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if val.Kind() != reflect.String {
+		return ValueEncoderError{
+			Name:     "StringEncodeValue",
+			Kinds:    []reflect.Kind{reflect.String},
+			Received: val,
+		}
+	}
+
+	return vw.WriteString(val.String())
+}
+
+func (sc *StringCodec) decodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+	if t.Kind() != reflect.String {
+		return emptyValue, ValueDecoderError{
+			Name:     "StringDecodeValue",
+			Kinds:    []reflect.Kind{reflect.String},
+			Received: reflect.Zero(t),
+		}
+	}
+
+	var str string
+	var err error
+	switch vr.Type() {
+	case bsontype.String:
+		str, err = vr.ReadString()
+		if err != nil {
+			return emptyValue, err
+		}
+	case bsontype.ObjectID:
+		oid, err := vr.ReadObjectID()
+		if err != nil {
+			return emptyValue, err
+		}
+		if sc.DecodeObjectIDAsHex {
+			str = oid.Hex()
+		} else {
+			byteArray := [12]byte(oid)
+			str = string(byteArray[:])
+		}
+	case bsontype.Symbol:
+		str, err = vr.ReadSymbol()
+		if err != nil {
+			return emptyValue, err
+		}
+	case bsontype.Binary:
+		data, subtype, err := vr.ReadBinary()
+		if err != nil {
+			return emptyValue, err
+		}
+		if subtype != bsontype.BinaryGeneric && subtype != bsontype.BinaryBinaryOld {
+			return emptyValue, decodeBinaryError{subtype: subtype, typeName: "string"}
+		}
+		str = string(data)
+	case bsontype.Null:
+		if err = vr.ReadNull(); err != nil {
+			return emptyValue, err
+		}
+	case bsontype.Undefined:
+		if err = vr.ReadUndefined(); err != nil {
+			return emptyValue, err
+		}
+	default:
+		return emptyValue, fmt.Errorf("cannot decode %v into a string type", vr.Type())
+	}
+
+	return reflect.ValueOf(str), nil
+}
+
+// DecodeValue is the ValueDecoder for string types.
+func (sc *StringCodec) DecodeValue(dctx DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if !val.CanSet() || val.Kind() != reflect.String {
+		return ValueDecoderError{Name: "StringDecodeValue", Kinds: []reflect.Kind{reflect.String}, Received: val}
+	}
+
+	elem, err := sc.decodeType(dctx, vr, val.Type())
+	if err != nil {
+		return err
+	}
+
+	val.SetString(elem.String())
+	return nil
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/struct_codec.go

@@ -0,0 +1,664 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+
+	"go.mongodb.org/mongo-driver/bson/bsonoptions"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+)
+
+// DecodeError represents an error that occurs when unmarshalling BSON bytes into a native Go type.
+type DecodeError struct {
+	keys    []string
+	wrapped error
+}
+
+// Unwrap returns the underlying error
+func (de *DecodeError) Unwrap() error {
+	return de.wrapped
+}
+
+// Error implements the error interface.
+func (de *DecodeError) Error() string {
+	// The keys are stored in reverse order because the de.keys slice is builtup while propagating the error up the
+	// stack of BSON keys, so we call de.Keys(), which reverses them.
+	keyPath := strings.Join(de.Keys(), ".")
+	return fmt.Sprintf("error decoding key %s: %v", keyPath, de.wrapped)
+}
+
+// Keys returns the BSON key path that caused an error as a slice of strings. The keys in the slice are in top-down
+// order. For example, if the document being unmarshalled was {a: {b: {c: 1}}} and the value for c was supposed to be
+// a string, the keys slice will be ["a", "b", "c"].
+func (de *DecodeError) Keys() []string {
+	reversedKeys := make([]string, 0, len(de.keys))
+	for idx := len(de.keys) - 1; idx >= 0; idx-- {
+		reversedKeys = append(reversedKeys, de.keys[idx])
+	}
+
+	return reversedKeys
+}
+
+// Zeroer allows custom struct types to implement a report of zero
+// state. All struct types that don't implement Zeroer or where IsZero
+// returns false are considered to be not zero.
+type Zeroer interface {
+	IsZero() bool
+}
+
+// StructCodec is the Codec used for struct values.
+type StructCodec struct {
+	cache                            map[reflect.Type]*structDescription
+	l                                sync.RWMutex
+	parser                           StructTagParser
+	DecodeZeroStruct                 bool
+	DecodeDeepZeroInline             bool
+	EncodeOmitDefaultStruct          bool
+	AllowUnexportedFields            bool
+	OverwriteDuplicatedInlinedFields bool
+}
+
+var _ ValueEncoder = &StructCodec{}
+var _ ValueDecoder = &StructCodec{}
+
+// NewStructCodec returns a StructCodec that uses p for struct tag parsing.
+func NewStructCodec(p StructTagParser, opts ...*bsonoptions.StructCodecOptions) (*StructCodec, error) {
+	if p == nil {
+		return nil, errors.New("a StructTagParser must be provided to NewStructCodec")
+	}
+
+	structOpt := bsonoptions.MergeStructCodecOptions(opts...)
+
+	codec := &StructCodec{
+		cache:  make(map[reflect.Type]*structDescription),
+		parser: p,
+	}
+
+	if structOpt.DecodeZeroStruct != nil {
+		codec.DecodeZeroStruct = *structOpt.DecodeZeroStruct
+	}
+	if structOpt.DecodeDeepZeroInline != nil {
+		codec.DecodeDeepZeroInline = *structOpt.DecodeDeepZeroInline
+	}
+	if structOpt.EncodeOmitDefaultStruct != nil {
+		codec.EncodeOmitDefaultStruct = *structOpt.EncodeOmitDefaultStruct
+	}
+	if structOpt.OverwriteDuplicatedInlinedFields != nil {
+		codec.OverwriteDuplicatedInlinedFields = *structOpt.OverwriteDuplicatedInlinedFields
+	}
+	if structOpt.AllowUnexportedFields != nil {
+		codec.AllowUnexportedFields = *structOpt.AllowUnexportedFields
+	}
+
+	return codec, nil
+}
+
+// EncodeValue handles encoding generic struct types.
+func (sc *StructCodec) EncodeValue(r EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Kind() != reflect.Struct {
+		return ValueEncoderError{Name: "StructCodec.EncodeValue", Kinds: []reflect.Kind{reflect.Struct}, Received: val}
+	}
+
+	sd, err := sc.describeStruct(r.Registry, val.Type())
+	if err != nil {
+		return err
+	}
+
+	dw, err := vw.WriteDocument()
+	if err != nil {
+		return err
+	}
+	var rv reflect.Value
+	for _, desc := range sd.fl {
+		if desc.inline == nil {
+			rv = val.Field(desc.idx)
+		} else {
+			rv, err = fieldByIndexErr(val, desc.inline)
+			if err != nil {
+				continue
+			}
+		}
+
+		desc.encoder, rv, err = defaultValueEncoders.lookupElementEncoder(r, desc.encoder, rv)
+
+		if err != nil && err != errInvalidValue {
+			return err
+		}
+
+		if err == errInvalidValue {
+			if desc.omitEmpty {
+				continue
+			}
+			vw2, err := dw.WriteDocumentElement(desc.name)
+			if err != nil {
+				return err
+			}
+			err = vw2.WriteNull()
+			if err != nil {
+				return err
+			}
+			continue
+		}
+
+		if desc.encoder == nil {
+			return ErrNoEncoder{Type: rv.Type()}
+		}
+
+		encoder := desc.encoder
+
+		var isZero bool
+		rvInterface := rv.Interface()
+		if cz, ok := encoder.(CodecZeroer); ok {
+			isZero = cz.IsTypeZero(rvInterface)
+		} else if rv.Kind() == reflect.Interface {
+			// sc.isZero will not treat an interface rv as an interface, so we need to check for the zero interface separately.
+			isZero = rv.IsNil()
+		} else {
+			isZero = sc.isZero(rvInterface)
+		}
+		if desc.omitEmpty && isZero {
+			continue
+		}
+
+		vw2, err := dw.WriteDocumentElement(desc.name)
+		if err != nil {
+			return err
+		}
+
+		ectx := EncodeContext{Registry: r.Registry, MinSize: desc.minSize}
+		err = encoder.EncodeValue(ectx, vw2, rv)
+		if err != nil {
+			return err
+		}
+	}
+
+	if sd.inlineMap >= 0 {
+		rv := val.Field(sd.inlineMap)
+		collisionFn := func(key string) bool {
+			_, exists := sd.fm[key]
+			return exists
+		}
+
+		return defaultMapCodec.mapEncodeValue(r, dw, rv, collisionFn)
+	}
+
+	return dw.WriteDocumentEnd()
+}
+
+func newDecodeError(key string, original error) error {
+	de, ok := original.(*DecodeError)
+	if !ok {
+		return &DecodeError{
+			keys:    []string{key},
+			wrapped: original,
+		}
+	}
+
+	de.keys = append(de.keys, key)
+	return de
+}
+
+// DecodeValue implements the Codec interface.
+// By default, map types in val will not be cleared. If a map has existing key/value pairs, it will be extended with the new ones from vr.
+// For slices, the decoder will set the length of the slice to zero and append all elements. The underlying array will not be cleared.
+func (sc *StructCodec) DecodeValue(r DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if !val.CanSet() || val.Kind() != reflect.Struct {
+		return ValueDecoderError{Name: "StructCodec.DecodeValue", Kinds: []reflect.Kind{reflect.Struct}, Received: val}
+	}
+
+	switch vrType := vr.Type(); vrType {
+	case bsontype.Type(0), bsontype.EmbeddedDocument:
+	case bsontype.Null:
+		if err := vr.ReadNull(); err != nil {
+			return err
+		}
+
+		val.Set(reflect.Zero(val.Type()))
+		return nil
+	case bsontype.Undefined:
+		if err := vr.ReadUndefined(); err != nil {
+			return err
+		}
+
+		val.Set(reflect.Zero(val.Type()))
+		return nil
+	default:
+		return fmt.Errorf("cannot decode %v into a %s", vrType, val.Type())
+	}
+
+	sd, err := sc.describeStruct(r.Registry, val.Type())
+	if err != nil {
+		return err
+	}
+
+	if sc.DecodeZeroStruct {
+		val.Set(reflect.Zero(val.Type()))
+	}
+	if sc.DecodeDeepZeroInline && sd.inline {
+		val.Set(deepZero(val.Type()))
+	}
+
+	var decoder ValueDecoder
+	var inlineMap reflect.Value
+	if sd.inlineMap >= 0 {
+		inlineMap = val.Field(sd.inlineMap)
+		decoder, err = r.LookupDecoder(inlineMap.Type().Elem())
+		if err != nil {
+			return err
+		}
+	}
+
+	dr, err := vr.ReadDocument()
+	if err != nil {
+		return err
+	}
+
+	for {
+		name, vr, err := dr.ReadElement()
+		if err == bsonrw.ErrEOD {
+			break
+		}
+		if err != nil {
+			return err
+		}
+
+		fd, exists := sd.fm[name]
+		if !exists {
+			// if the original name isn't found in the struct description, try again with the name in lowercase
+			// this could match if a BSON tag isn't specified because by default, describeStruct lowercases all field
+			// names
+			fd, exists = sd.fm[strings.ToLower(name)]
+		}
+
+		if !exists {
+			if sd.inlineMap < 0 {
+				// The encoding/json package requires a flag to return on error for non-existent fields.
+				// This functionality seems appropriate for the struct codec.
+				err = vr.Skip()
+				if err != nil {
+					return err
+				}
+				continue
+			}
+
+			if inlineMap.IsNil() {
+				inlineMap.Set(reflect.MakeMap(inlineMap.Type()))
+			}
+
+			elem := reflect.New(inlineMap.Type().Elem()).Elem()
+			r.Ancestor = inlineMap.Type()
+			err = decoder.DecodeValue(r, vr, elem)
+			if err != nil {
+				return err
+			}
+			inlineMap.SetMapIndex(reflect.ValueOf(name), elem)
+			continue
+		}
+
+		var field reflect.Value
+		if fd.inline == nil {
+			field = val.Field(fd.idx)
+		} else {
+			field, err = getInlineField(val, fd.inline)
+			if err != nil {
+				return err
+			}
+		}
+
+		if !field.CanSet() { // Being settable is a super set of being addressable.
+			innerErr := fmt.Errorf("field %v is not settable", field)
+			return newDecodeError(fd.name, innerErr)
+		}
+		if field.Kind() == reflect.Ptr && field.IsNil() {
+			field.Set(reflect.New(field.Type().Elem()))
+		}
+		field = field.Addr()
+
+		dctx := DecodeContext{Registry: r.Registry, Truncate: fd.truncate || r.Truncate}
+		if fd.decoder == nil {
+			return newDecodeError(fd.name, ErrNoDecoder{Type: field.Elem().Type()})
+		}
+
+		err = fd.decoder.DecodeValue(dctx, vr, field.Elem())
+		if err != nil {
+			return newDecodeError(fd.name, err)
+		}
+	}
+
+	return nil
+}
+
+func (sc *StructCodec) isZero(i interface{}) bool {
+	v := reflect.ValueOf(i)
+
+	// check the value validity
+	if !v.IsValid() {
+		return true
+	}
+
+	if z, ok := v.Interface().(Zeroer); ok && (v.Kind() != reflect.Ptr || !v.IsNil()) {
+		return z.IsZero()
+	}
+
+	switch v.Kind() {
+	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Interface, reflect.Ptr:
+		return v.IsNil()
+	case reflect.Struct:
+		if sc.EncodeOmitDefaultStruct {
+			vt := v.Type()
+			if vt == tTime {
+				return v.Interface().(time.Time).IsZero()
+			}
+			for i := 0; i < v.NumField(); i++ {
+				if vt.Field(i).PkgPath != "" && !vt.Field(i).Anonymous {
+					continue // Private field
+				}
+				fld := v.Field(i)
+				if !sc.isZero(fld.Interface()) {
+					return false
+				}
+			}
+			return true
+		}
+	}
+
+	return false
+}
+
+type structDescription struct {
+	fm        map[string]fieldDescription
+	fl        []fieldDescription
+	inlineMap int
+	inline    bool
+}
+
+type fieldDescription struct {
+	name      string // BSON key name
+	fieldName string // struct field name
+	idx       int
+	omitEmpty bool
+	minSize   bool
+	truncate  bool
+	inline    []int
+	encoder   ValueEncoder
+	decoder   ValueDecoder
+}
+
+type byIndex []fieldDescription
+
+func (bi byIndex) Len() int { return len(bi) }
+
+func (bi byIndex) Swap(i, j int) { bi[i], bi[j] = bi[j], bi[i] }
+
+func (bi byIndex) Less(i, j int) bool {
+	// If a field is inlined, its index in the top level struct is stored at inline[0]
+	iIdx, jIdx := bi[i].idx, bi[j].idx
+	if len(bi[i].inline) > 0 {
+		iIdx = bi[i].inline[0]
+	}
+	if len(bi[j].inline) > 0 {
+		jIdx = bi[j].inline[0]
+	}
+	if iIdx != jIdx {
+		return iIdx < jIdx
+	}
+	for k, biik := range bi[i].inline {
+		if k >= len(bi[j].inline) {
+			return false
+		}
+		if biik != bi[j].inline[k] {
+			return biik < bi[j].inline[k]
+		}
+	}
+	return len(bi[i].inline) < len(bi[j].inline)
+}
+
+func (sc *StructCodec) describeStruct(r *Registry, t reflect.Type) (*structDescription, error) {
+	// We need to analyze the struct, including getting the tags, collecting
+	// information about inlining, and create a map of the field name to the field.
+	sc.l.RLock()
+	ds, exists := sc.cache[t]
+	sc.l.RUnlock()
+	if exists {
+		return ds, nil
+	}
+
+	numFields := t.NumField()
+	sd := &structDescription{
+		fm:        make(map[string]fieldDescription, numFields),
+		fl:        make([]fieldDescription, 0, numFields),
+		inlineMap: -1,
+	}
+
+	var fields []fieldDescription
+	for i := 0; i < numFields; i++ {
+		sf := t.Field(i)
+		if sf.PkgPath != "" && (!sc.AllowUnexportedFields || !sf.Anonymous) {
+			// field is private or unexported fields aren't allowed, ignore
+			continue
+		}
+
+		sfType := sf.Type
+		encoder, err := r.LookupEncoder(sfType)
+		if err != nil {
+			encoder = nil
+		}
+		decoder, err := r.LookupDecoder(sfType)
+		if err != nil {
+			decoder = nil
+		}
+
+		description := fieldDescription{
+			fieldName: sf.Name,
+			idx:       i,
+			encoder:   encoder,
+			decoder:   decoder,
+		}
+
+		stags, err := sc.parser.ParseStructTags(sf)
+		if err != nil {
+			return nil, err
+		}
+		if stags.Skip {
+			continue
+		}
+		description.name = stags.Name
+		description.omitEmpty = stags.OmitEmpty
+		description.minSize = stags.MinSize
+		description.truncate = stags.Truncate
+
+		if stags.Inline {
+			sd.inline = true
+			switch sfType.Kind() {
+			case reflect.Map:
+				if sd.inlineMap >= 0 {
+					return nil, errors.New("(struct " + t.String() + ") multiple inline maps")
+				}
+				if sfType.Key() != tString {
+					return nil, errors.New("(struct " + t.String() + ") inline map must have a string keys")
+				}
+				sd.inlineMap = description.idx
+			case reflect.Ptr:
+				sfType = sfType.Elem()
+				if sfType.Kind() != reflect.Struct {
+					return nil, fmt.Errorf("(struct %s) inline fields must be a struct, a struct pointer, or a map", t.String())
+				}
+				fallthrough
+			case reflect.Struct:
+				inlinesf, err := sc.describeStruct(r, sfType)
+				if err != nil {
+					return nil, err
+				}
+				for _, fd := range inlinesf.fl {
+					if fd.inline == nil {
+						fd.inline = []int{i, fd.idx}
+					} else {
+						fd.inline = append([]int{i}, fd.inline...)
+					}
+					fields = append(fields, fd)
+
+				}
+			default:
+				return nil, fmt.Errorf("(struct %s) inline fields must be a struct, a struct pointer, or a map", t.String())
+			}
+			continue
+		}
+		fields = append(fields, description)
+	}
+
+	// Sort fieldDescriptions by name and use dominance rules to determine which should be added for each name
+	sort.Slice(fields, func(i, j int) bool {
+		x := fields
+		// sort field by name, breaking ties with depth, then
+		// breaking ties with index sequence.
+		if x[i].name != x[j].name {
+			return x[i].name < x[j].name
+		}
+		if len(x[i].inline) != len(x[j].inline) {
+			return len(x[i].inline) < len(x[j].inline)
+		}
+		return byIndex(x).Less(i, j)
+	})
+
+	for advance, i := 0, 0; i < len(fields); i += advance {
+		// One iteration per name.
+		// Find the sequence of fields with the name of this first field.
+		fi := fields[i]
+		name := fi.name
+		for advance = 1; i+advance < len(fields); advance++ {
+			fj := fields[i+advance]
+			if fj.name != name {
+				break
+			}
+		}
+		if advance == 1 { // Only one field with this name
+			sd.fl = append(sd.fl, fi)
+			sd.fm[name] = fi
+			continue
+		}
+		dominant, ok := dominantField(fields[i : i+advance])
+		if !ok || !sc.OverwriteDuplicatedInlinedFields {
+			return nil, fmt.Errorf("struct %s has duplicated key %s", t.String(), name)
+		}
+		sd.fl = append(sd.fl, dominant)
+		sd.fm[name] = dominant
+	}
+
+	sort.Sort(byIndex(sd.fl))
+
+	sc.l.Lock()
+	sc.cache[t] = sd
+	sc.l.Unlock()
+
+	return sd, nil
+}
+
+// dominantField looks through the fields, all of which are known to
+// have the same name, to find the single field that dominates the
+// others using Go's inlining rules. If there are multiple top-level
+// fields, the boolean will be false: This condition is an error in Go
+// and we skip all the fields.
+func dominantField(fields []fieldDescription) (fieldDescription, bool) {
+	// The fields are sorted in increasing index-length order, then by presence of tag.
+	// That means that the first field is the dominant one. We need only check
+	// for error cases: two fields at top level.
+	if len(fields) > 1 &&
+		len(fields[0].inline) == len(fields[1].inline) {
+		return fieldDescription{}, false
+	}
+	return fields[0], true
+}
+
+func fieldByIndexErr(v reflect.Value, index []int) (result reflect.Value, err error) {
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			switch r := recovered.(type) {
+			case string:
+				err = fmt.Errorf("%s", r)
+			case error:
+				err = r
+			}
+		}
+	}()
+
+	result = v.FieldByIndex(index)
+	return
+}
+
+func getInlineField(val reflect.Value, index []int) (reflect.Value, error) {
+	field, err := fieldByIndexErr(val, index)
+	if err == nil {
+		return field, nil
+	}
+
+	// if parent of this element doesn't exist, fix its parent
+	inlineParent := index[:len(index)-1]
+	var fParent reflect.Value
+	if fParent, err = fieldByIndexErr(val, inlineParent); err != nil {
+		fParent, err = getInlineField(val, inlineParent)
+		if err != nil {
+			return fParent, err
+		}
+	}
+	fParent.Set(reflect.New(fParent.Type().Elem()))
+
+	return fieldByIndexErr(val, index)
+}
+
+// DeepZero returns recursive zero object
+func deepZero(st reflect.Type) (result reflect.Value) {
+	result = reflect.Indirect(reflect.New(st))
+
+	if result.Kind() == reflect.Struct {
+		for i := 0; i < result.NumField(); i++ {
+			if f := result.Field(i); f.Kind() == reflect.Ptr {
+				if f.CanInterface() {
+					if ft := reflect.TypeOf(f.Interface()); ft.Elem().Kind() == reflect.Struct {
+						result.Field(i).Set(recursivePointerTo(deepZero(ft.Elem())))
+					}
+				}
+			}
+		}
+	}
+
+	return
+}
+
+// recursivePointerTo calls reflect.New(v.Type) but recursively for its fields inside
+func recursivePointerTo(v reflect.Value) reflect.Value {
+	v = reflect.Indirect(v)
+	result := reflect.New(v.Type())
+	if v.Kind() == reflect.Struct {
+		for i := 0; i < v.NumField(); i++ {
+			if f := v.Field(i); f.Kind() == reflect.Ptr {
+				if f.Elem().Kind() == reflect.Struct {
+					result.Elem().Field(i).Set(recursivePointerTo(f))
+				}
+			}
+		}
+	}
+
+	return result
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/struct_tag_parser.go

@@ -0,0 +1,139 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"reflect"
+	"strings"
+)
+
+// StructTagParser returns the struct tags for a given struct field.
+type StructTagParser interface {
+	ParseStructTags(reflect.StructField) (StructTags, error)
+}
+
+// StructTagParserFunc is an adapter that allows a generic function to be used
+// as a StructTagParser.
+type StructTagParserFunc func(reflect.StructField) (StructTags, error)
+
+// ParseStructTags implements the StructTagParser interface.
+func (stpf StructTagParserFunc) ParseStructTags(sf reflect.StructField) (StructTags, error) {
+	return stpf(sf)
+}
+
+// StructTags represents the struct tag fields that the StructCodec uses during
+// the encoding and decoding process.
+//
+// In the case of a struct, the lowercased field name is used as the key for each exported
+// field but this behavior may be changed using a struct tag. The tag may also contain flags to
+// adjust the marshalling behavior for the field.
+//
+// The properties are defined below:
+//
+//	OmitEmpty  Only include the field if it's not set to the zero value for the type or to
+//	           empty slices or maps.
+//
+//	MinSize    Marshal an integer of a type larger than 32 bits value as an int32, if that's
+//	           feasible while preserving the numeric value.
+//
+//	Truncate   When unmarshaling a BSON double, it is permitted to lose precision to fit within
+//	           a float32.
+//
+//	Inline     Inline the field, which must be a struct or a map, causing all of its fields
+//	           or keys to be processed as if they were part of the outer struct. For maps,
+//	           keys must not conflict with the bson keys of other struct fields.
+//
+//	Skip       This struct field should be skipped. This is usually denoted by parsing a "-"
+//	           for the name.
+//
+// TODO(skriptble): Add tags for undefined as nil and for null as nil.
+type StructTags struct {
+	Name      string
+	OmitEmpty bool
+	MinSize   bool
+	Truncate  bool
+	Inline    bool
+	Skip      bool
+}
+
+// DefaultStructTagParser is the StructTagParser used by the StructCodec by default.
+// It will handle the bson struct tag. See the documentation for StructTags to see
+// what each of the returned fields means.
+//
+// If there is no name in the struct tag fields, the struct field name is lowercased.
+// The tag formats accepted are:
+//
+//	"[<key>][,<flag1>[,<flag2>]]"
+//
+//	`(...) bson:"[<key>][,<flag1>[,<flag2>]]" (...)`
+//
+// An example:
+//
+//	type T struct {
+//	    A bool
+//	    B int    "myb"
+//	    C string "myc,omitempty"
+//	    D string `bson:",omitempty" json:"jsonkey"`
+//	    E int64  ",minsize"
+//	    F int64  "myf,omitempty,minsize"
+//	}
+//
+// A struct tag either consisting entirely of '-' or with a bson key with a
+// value consisting entirely of '-' will return a StructTags with Skip true and
+// the remaining fields will be their default values.
+var DefaultStructTagParser StructTagParserFunc = func(sf reflect.StructField) (StructTags, error) {
+	key := strings.ToLower(sf.Name)
+	tag, ok := sf.Tag.Lookup("bson")
+	if !ok && !strings.Contains(string(sf.Tag), ":") && len(sf.Tag) > 0 {
+		tag = string(sf.Tag)
+	}
+	return parseTags(key, tag)
+}
+
+func parseTags(key string, tag string) (StructTags, error) {
+	var st StructTags
+	if tag == "-" {
+		st.Skip = true
+		return st, nil
+	}
+
+	for idx, str := range strings.Split(tag, ",") {
+		if idx == 0 && str != "" {
+			key = str
+		}
+		switch str {
+		case "omitempty":
+			st.OmitEmpty = true
+		case "minsize":
+			st.MinSize = true
+		case "truncate":
+			st.Truncate = true
+		case "inline":
+			st.Inline = true
+		}
+	}
+
+	st.Name = key
+
+	return st, nil
+}
+
+// JSONFallbackStructTagParser has the same behavior as DefaultStructTagParser
+// but will also fallback to parsing the json tag instead on a field where the
+// bson tag isn't available.
+var JSONFallbackStructTagParser StructTagParserFunc = func(sf reflect.StructField) (StructTags, error) {
+	key := strings.ToLower(sf.Name)
+	tag, ok := sf.Tag.Lookup("bson")
+	if !ok {
+		tag, ok = sf.Tag.Lookup("json")
+	}
+	if !ok && !strings.Contains(string(sf.Tag), ":") && len(sf.Tag) > 0 {
+		tag = string(sf.Tag)
+	}
+
+	return parseTags(key, tag)
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/time_codec.go

@@ -0,0 +1,127 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"fmt"
+	"reflect"
+	"time"
+
+	"go.mongodb.org/mongo-driver/bson/bsonoptions"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
+const (
+	timeFormatString = "2006-01-02T15:04:05.999Z07:00"
+)
+
+// TimeCodec is the Codec used for time.Time values.
+type TimeCodec struct {
+	UseLocalTimeZone bool
+}
+
+var (
+	defaultTimeCodec = NewTimeCodec()
+
+	_ ValueCodec  = defaultTimeCodec
+	_ typeDecoder = defaultTimeCodec
+)
+
+// NewTimeCodec returns a TimeCodec with options opts.
+func NewTimeCodec(opts ...*bsonoptions.TimeCodecOptions) *TimeCodec {
+	timeOpt := bsonoptions.MergeTimeCodecOptions(opts...)
+
+	codec := TimeCodec{}
+	if timeOpt.UseLocalTimeZone != nil {
+		codec.UseLocalTimeZone = *timeOpt.UseLocalTimeZone
+	}
+	return &codec
+}
+
+func (tc *TimeCodec) decodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+	if t != tTime {
+		return emptyValue, ValueDecoderError{
+			Name:     "TimeDecodeValue",
+			Types:    []reflect.Type{tTime},
+			Received: reflect.Zero(t),
+		}
+	}
+
+	var timeVal time.Time
+	switch vrType := vr.Type(); vrType {
+	case bsontype.DateTime:
+		dt, err := vr.ReadDateTime()
+		if err != nil {
+			return emptyValue, err
+		}
+		timeVal = time.Unix(dt/1000, dt%1000*1000000)
+	case bsontype.String:
+		// assume strings are in the isoTimeFormat
+		timeStr, err := vr.ReadString()
+		if err != nil {
+			return emptyValue, err
+		}
+		timeVal, err = time.Parse(timeFormatString, timeStr)
+		if err != nil {
+			return emptyValue, err
+		}
+	case bsontype.Int64:
+		i64, err := vr.ReadInt64()
+		if err != nil {
+			return emptyValue, err
+		}
+		timeVal = time.Unix(i64/1000, i64%1000*1000000)
+	case bsontype.Timestamp:
+		t, _, err := vr.ReadTimestamp()
+		if err != nil {
+			return emptyValue, err
+		}
+		timeVal = time.Unix(int64(t), 0)
+	case bsontype.Null:
+		if err := vr.ReadNull(); err != nil {
+			return emptyValue, err
+		}
+	case bsontype.Undefined:
+		if err := vr.ReadUndefined(); err != nil {
+			return emptyValue, err
+		}
+	default:
+		return emptyValue, fmt.Errorf("cannot decode %v into a time.Time", vrType)
+	}
+
+	if !tc.UseLocalTimeZone {
+		timeVal = timeVal.UTC()
+	}
+	return reflect.ValueOf(timeVal), nil
+}
+
+// DecodeValue is the ValueDecoderFunc for time.Time.
+func (tc *TimeCodec) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if !val.CanSet() || val.Type() != tTime {
+		return ValueDecoderError{Name: "TimeDecodeValue", Types: []reflect.Type{tTime}, Received: val}
+	}
+
+	elem, err := tc.decodeType(dc, vr, tTime)
+	if err != nil {
+		return err
+	}
+
+	val.Set(elem)
+	return nil
+}
+
+// EncodeValue is the ValueEncoderFunc for time.TIme.
+func (tc *TimeCodec) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	if !val.IsValid() || val.Type() != tTime {
+		return ValueEncoderError{Name: "TimeEncodeValue", Types: []reflect.Type{tTime}, Received: val}
+	}
+	tt := val.Interface().(time.Time)
+	dt := primitive.NewDateTimeFromTime(tt)
+	return vw.WriteDateTime(int64(dt))
+}

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/types.go

@@ -0,0 +1,57 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"encoding/json"
+	"net/url"
+	"reflect"
+	"time"
+
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
+)
+
+var tBool = reflect.TypeOf(false)
+var tFloat64 = reflect.TypeOf(float64(0))
+var tInt32 = reflect.TypeOf(int32(0))
+var tInt64 = reflect.TypeOf(int64(0))
+var tString = reflect.TypeOf("")
+var tTime = reflect.TypeOf(time.Time{})
+
+var tEmpty = reflect.TypeOf((*interface{})(nil)).Elem()
+var tByteSlice = reflect.TypeOf([]byte(nil))
+var tByte = reflect.TypeOf(byte(0x00))
+var tURL = reflect.TypeOf(url.URL{})
+var tJSONNumber = reflect.TypeOf(json.Number(""))
+
+var tValueMarshaler = reflect.TypeOf((*ValueMarshaler)(nil)).Elem()
+var tValueUnmarshaler = reflect.TypeOf((*ValueUnmarshaler)(nil)).Elem()
+var tMarshaler = reflect.TypeOf((*Marshaler)(nil)).Elem()
+var tUnmarshaler = reflect.TypeOf((*Unmarshaler)(nil)).Elem()
+var tProxy = reflect.TypeOf((*Proxy)(nil)).Elem()
+
+var tBinary = reflect.TypeOf(primitive.Binary{})
+var tUndefined = reflect.TypeOf(primitive.Undefined{})
+var tOID = reflect.TypeOf(primitive.ObjectID{})
+var tDateTime = reflect.TypeOf(primitive.DateTime(0))
+var tNull = reflect.TypeOf(primitive.Null{})
+var tRegex = reflect.TypeOf(primitive.Regex{})
+var tCodeWithScope = reflect.TypeOf(primitive.CodeWithScope{})
+var tDBPointer = reflect.TypeOf(primitive.DBPointer{})
+var tJavaScript = reflect.TypeOf(primitive.JavaScript(""))
+var tSymbol = reflect.TypeOf(primitive.Symbol(""))
+var tTimestamp = reflect.TypeOf(primitive.Timestamp{})
+var tDecimal = reflect.TypeOf(primitive.Decimal128{})
+var tMinKey = reflect.TypeOf(primitive.MinKey{})
+var tMaxKey = reflect.TypeOf(primitive.MaxKey{})
+var tD = reflect.TypeOf(primitive.D{})
+var tA = reflect.TypeOf(primitive.A{})
+var tE = reflect.TypeOf(primitive.E{})
+
+var tCoreDocument = reflect.TypeOf(bsoncore.Document{})
+var tCoreArray = reflect.TypeOf(bsoncore.Array{})

vendor/go.mongodb.org/mongo-driver/bson/bsoncodec/uint_codec.go

@@ -0,0 +1,173 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package bsoncodec
+
+import (
+	"fmt"
+	"math"
+	"reflect"
+
+	"go.mongodb.org/mongo-driver/bson/bsonoptions"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+)
+
+// UIntCodec is the Codec used for uint values.
+type UIntCodec struct {
+	EncodeToMinSize bool
+}
+
+var (
+	defaultUIntCodec = NewUIntCodec()
+
+	_ ValueCodec  = defaultUIntCodec
+	_ typeDecoder = defaultUIntCodec
+)
+
+// NewUIntCodec returns a UIntCodec with options opts.
+func NewUIntCodec(opts ...*bsonoptions.UIntCodecOptions) *UIntCodec {
+	uintOpt := bsonoptions.MergeUIntCodecOptions(opts...)
+
+	codec := UIntCodec{}
+	if uintOpt.EncodeToMinSize != nil {
+		codec.EncodeToMinSize = *uintOpt.EncodeToMinSize
+	}
+	return &codec
+}
+
+// EncodeValue is the ValueEncoder for uint types.
+func (uic *UIntCodec) EncodeValue(ec EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
+	switch val.Kind() {
+	case reflect.Uint8, reflect.Uint16:
+		return vw.WriteInt32(int32(val.Uint()))
+	case reflect.Uint, reflect.Uint32, reflect.Uint64:
+		u64 := val.Uint()
+
+		// If ec.MinSize or if encodeToMinSize is true for a non-uint64 value we should write val as an int32
+		useMinSize := ec.MinSize || (uic.EncodeToMinSize && val.Kind() != reflect.Uint64)
+
+		if u64 <= math.MaxInt32 && useMinSize {
+			return vw.WriteInt32(int32(u64))
+		}
+		if u64 > math.MaxInt64 {
+			return fmt.Errorf("%d overflows int64", u64)
+		}
+		return vw.WriteInt64(int64(u64))
+	}
+
+	return ValueEncoderError{
+		Name:     "UintEncodeValue",
+		Kinds:    []reflect.Kind{reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint},
+		Received: val,
+	}
+}
+
+func (uic *UIntCodec) decodeType(dc DecodeContext, vr bsonrw.ValueReader, t reflect.Type) (reflect.Value, error) {
+	var i64 int64
+	var err error
+	switch vrType := vr.Type(); vrType {
+	case bsontype.Int32:
+		i32, err := vr.ReadInt32()
+		if err != nil {
+			return emptyValue, err
+		}
+		i64 = int64(i32)
+	case bsontype.Int64:
+		i64, err = vr.ReadInt64()
+		if err != nil {
+			return emptyValue, err
+		}
+	case bsontype.Double:
+		f64, err := vr.ReadDouble()
+		if err != nil {
+			return emptyValue, err
+		}
+		if !dc.Truncate && math.Floor(f64) != f64 {
+			return emptyValue, errCannotTruncate
+		}
+		if f64 > float64(math.MaxInt64) {
+			return emptyValue, fmt.Errorf("%g overflows int64", f64)
+		}
+		i64 = int64(f64)
+	case bsontype.Boolean:
+		b, err := vr.ReadBoolean()
+		if err != nil {
+			return emptyValue, err
+		}
+		if b {
+			i64 = 1
+		}
+	case bsontype.Null:
+		if err = vr.ReadNull(); err != nil {
+			return emptyValue, err
+		}
+	case bsontype.Undefined:
+		if err = vr.ReadUndefined(); err != nil {
+			return emptyValue, err
+		}
+	default:
+		return emptyValue, fmt.Errorf("cannot decode %v into an integer type", vrType)
+	}
+
+	switch t.Kind() {
+	case reflect.Uint8:
+		if i64 < 0 || i64 > math.MaxUint8 {
+			return emptyValue, fmt.Errorf("%d overflows uint8", i64)
+		}
+
+		return reflect.ValueOf(uint8(i64)), nil
+	case reflect.Uint16:
+		if i64 < 0 || i64 > math.MaxUint16 {
+			return emptyValue, fmt.Errorf("%d overflows uint16", i64)
+		}
+
+		return reflect.ValueOf(uint16(i64)), nil
+	case reflect.Uint32:
+		if i64 < 0 || i64 > math.MaxUint32 {
+			return emptyValue, fmt.Errorf("%d overflows uint32", i64)
+		}
+
+		return reflect.ValueOf(uint32(i64)), nil
+	case reflect.Uint64:
+		if i64 < 0 {
+			return emptyValue, fmt.Errorf("%d overflows uint64", i64)
+		}
+
+		return reflect.ValueOf(uint64(i64)), nil
+	case reflect.Uint:
+		if i64 < 0 || int64(uint(i64)) != i64 { // Can we fit this inside of an uint
+			return emptyValue, fmt.Errorf("%d overflows uint", i64)
+		}
+
+		return reflect.ValueOf(uint(i64)), nil
+	default:
+		return emptyValue, ValueDecoderError{
+			Name:     "UintDecodeValue",
+			Kinds:    []reflect.Kind{reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint},
+			Received: reflect.Zero(t),
+		}
+	}
+}
+
+// DecodeValue is the ValueDecoder for uint types.
+func (uic *UIntCodec) DecodeValue(dc DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if !val.CanSet() {
+		return ValueDecoderError{
+			Name:     "UintDecodeValue",
+			Kinds:    []reflect.Kind{reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint},
+			Received: val,
+		}
+	}
+
+	elem, err := uic.decodeType(dc, vr, val.Type())
+	if err != nil {
+		return err
+	}
+
+	val.SetUint(elem.Uint())
+	return nil
+}