// scanning lines, a [SplitFunc] can return (0, nil, nil) to signal the
// [Scanner] to read more data into the slice and try again with a
// longer slice starting at the same point in the input.
//
// The function is never called with an empty data slice unless atEOF
// is true. If atEOF is true, however, data may be non-empty and,
// as always, holds unprocessed text.

pkg bufio, method (*Scanner) Scan() bool
pkg bufio, method (*Scanner) Split(SplitFunc)
pkg bufio, method (*Scanner) Text() string
pkg bufio, method (*Writer) ReadFrom(io.Reader) (int64, error)
pkg bufio, method (ReadWriter) ReadFrom(io.Reader) (int64, error)
pkg bufio, method (ReadWriter) WriteTo(io.Writer) (int64, error)
pkg bufio, type Scanner struct
pkg bufio, type SplitFunc func([]uint8, bool) (int, []uint8, error)
pkg bufio, var ErrAdvanceTooFar error