addtypes: adding type Any for go-tarantool

Author: New year

any_gen.go

@@ -0,0 +1,92 @@
+package option
+
+import (
+	"github.com/vmihailenco/msgpack/v5"
+	"github.com/vmihailenco/msgpack/v5/msgpcode"
+)
+
+type Any struct {
+	value  any
+	exists bool
+}
+
+func SomeAny(value any) Any {
+	return Any{
+		value:  value,
+		exists: true,
+	}
+}
+
+func NoneAny() Any {
+	return Any{
+		exists: false,
+		value:  zero[any](),
+	}
+}
+
+func (o Any) IsSome() bool {
+	return o.exists
+}
+
+func (o Any) IsZero() bool {
+	return !o.exists
+}
+
+func (o Any) IsNil() bool {
+	return o.IsZero()
+}
+
+func (o Any) Get() (any, bool) {
+	return o.value, o.exists
+}
+
+func (o Any) MustGet() any {
+	if !o.exists {
+		panic("optional value is not set!")
+	}
+	return o.value
+}
+
+func (o Any) Unwrap() any {
+	return o.value
+}
+
+func (o Any) UnwrapOr(defaultValue func() any) any {
+	if o.exists {
+		return o.value
+	}
+
+	return defaultValue()
+}
+
+func (o Any) EncodeMsgpack(encoder *msgpack.Encoder) error {
+	if o.exists {
+		return newEncodeError("Any", encodeAny(encoder, o.value))
+	}
+
+	return newEncodeError("Any", encoder.EncodeNil())
+}
+
+func (o *Any) DecodeMsgpack(decoder *msgpack.Decoder) error {
+	code, err := decoder.PeekCode()
+	if err != nil {
+		return newDecodeError("Any", err)
+	}
+
+	switch {
+	case code == msgpcode.Nil:
+		o.exists = false
+
+		return newDecodeError("Any", decoder.Skip())
+	case checkBool(code):
+		o.value, err = decodeAny(decoder)
+		if err != nil {
+			return newDecodeError("Any", err)
+		}
+		o.exists = true
+
+		return err
+	default:
+		return newDecodeWithCodeError("Any", code)
+	}
+}

msgpack.go

@@ -167,3 +167,11 @@ func decodeByte(decoder *msgpack.Decoder) (byte, error) {
 func encodeByte(encoder *msgpack.Encoder, b byte) error {
 	return encoder.EncodeUint8(b) //nolint:wrapcheck
 }
+
+func encodeAny(encoder *msgpack.Encoder, val any) error {
+	return encoder.Encode(val)
+}
+
+func decodeAny(decoder *msgpack.Decoder) (any, error) {
+	return decoder.DecodeInterfaceLoose()
+}