"unicode/utf8"
)

// A WordEncoder is an RFC 2047 encoded-word encoder.
type WordEncoder byte

const (
	// BEncoding represents Base64 encoding scheme as defined by RFC 2045.
	BEncoding = WordEncoder('b')
	// QEncoding represents the Q-encoding scheme as defined by RFC 2047.
	QEncoding = WordEncoder('q')
)

var (
	errInvalidWord = errors.New("mime: invalid RFC 2047 encoded-word")
)

同様に、このデータベースはPydanticモデル（属性を持つオブジェクト）を受け取らず、`dict`だけを受け取ります。

そのために`jsonable_encoder`を使用することができます。

Pydanticモデルのようなオブジェクトを受け取り、JSON互換版を返します:

```Python hl_lines="5 22"
{!../../../docs_src/encoder/tutorial001.py!}
```

この例では、Pydanticモデルを`dict`に、`datetime`を`str`に変換します。

package profile

import (
	"errors"
	"fmt"
	"sort"
)

func (p *Profile) decoder() []decoder {
	return profileDecoder
}

// preEncode populates the unexported fields to be used by encode
// (with suffix X) from the corresponding exported fields. The
// exported fields are cleared up to facilitate testing.
func (p *Profile) preEncode() {
	strings := make(map[string]int)
	addString(strings, "")

   */
  ReaderInputStream(Reader reader, CharsetEncoder encoder, int bufferSize) {
    this.reader = checkNotNull(reader);
    this.encoder = checkNotNull(encoder);
    checkArgument(bufferSize > 0, "bufferSize must be positive: %s", bufferSize);
    encoder.reset();

    charBuffer = CharBuffer.allocate(bufferSize);
    Java8Compatibility.flip(charBuffer);

    byteBuffer = ByteBuffer.allocate(bufferSize);
  }

   */
  ReaderInputStream(Reader reader, CharsetEncoder encoder, int bufferSize) {
    this.reader = checkNotNull(reader);
    this.encoder = checkNotNull(encoder);
    checkArgument(bufferSize > 0, "bufferSize must be positive: %s", bufferSize);
    encoder.reset();

    charBuffer = CharBuffer.allocate(bufferSize);
    Java8Compatibility.flip(charBuffer);

    byteBuffer = ByteBuffer.allocate(bufferSize);
  }

// which may be changed or disabled via [Encoding.WithPadding].
func NewEncoding(encoder string) *Encoding {
	if len(encoder) != 64 {
		panic("encoding alphabet is not 64-bytes long")
	}

	e := new(Encoding)
	e.padChar = StdPadding
	copy(e.encode[:], encoder)
	copy(e.decodeMap[:], decodeMapInitialize)

	for i := 0; i < len(encoder); i++ {
		// Note: While we document that the alphabet cannot contain

const bufferSize = 1024

type encoder struct {
	w   io.Writer
	err error
	out [bufferSize]byte // output buffer
}

// NewEncoder returns an [io.Writer] that writes lowercase hexadecimal characters to w.
func NewEncoder(w io.Writer) io.Writer {
	return &encoder{w: w}
}

func (e *encoder) Write(p []byte) (n int, err error) {

	return d.reader.Close()
}

type encoder struct {
	writer  io.Writer
	encoder runtime.Encoder
	buf     *bytes.Buffer
}

// NewEncoder returns a new streaming encoder.
func NewEncoder(w io.Writer, e runtime.Encoder) Encoder {
	return &encoder{
		writer:  w,
		encoder: e,
		buf:     &bytes.Buffer{},
	}
}

// Encode writes the provided object to the nested writer.

}

func (cfw *CoverageDataWriter) writeCounters(visitor CounterVisitor, ws *slicewriter.WriteSeeker) error {
	// Notes:
	// - this version writes everything little-endian, which means
	//   a call is needed to encode every value (expensive)
	// - we may want to move to a model in which we just blast out
	//   all counters, or possibly mmap the file and do the write
	//   implicitly.
	ctrb := make([]byte, 4)

		for _, tt := range encodingTests {
			encoded := tt.conv(p.encoded)
			dbuf := make([]byte, tt.enc.DecodedLen(len(encoded)))
			count, err := tt.enc.Decode(dbuf, []byte(encoded))
			testEqual(t, "Decode(%q) = error %v, want %v", encoded, err, error(nil))
			testEqual(t, "Decode(%q) = length %v, want %v", encoded, count, len(p.decoded))
			testEqual(t, "Decode(%q) = %q, want %q", encoded, string(dbuf[0:count]), p.decoded)