You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: encode.go
    path of file: ./repos/gotosocial/vendor/github.com/bytedance/sonic/ast
    
    the code of the file until where you have to start completion: /*
 * Copyright 2021 ByteDance Inc.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the
    
func (self *Node) encode(buf *[]byte) error {
    if self.IsRaw() {
        return self.encodeRaw(buf)
    }
    switch self.Type() {
        case V_NONE  : return ErrNotExist
        case V_ERROR : return self.Check()
        case V_NULL  : return self.encodeNull(buf)
        case V_TRUE  : return self.encodeTrue(buf)
        case V_FALSE : return self.encodeFalse(buf)
        case V_ARRAY : return self.encodeArray(buf)
        case V_OBJECT: return self.encodeObject(buf)
        case V_STRING: return self.encodeString(buf)
        case V_NUMBER: return self.encodeNumber(buf)
        case V_ANY   : return self.encodeInterface(buf)
        default      : return ErrUnsupportType 
    }
}