simplejsonext

type Emitter interface {
	Emit(val any) error
	Reset(io.Writer)
}

type Parser interface {
	// Parse JSON from the front of the contained data as a simply-typed value
	// and return it. If the data is empty, the exact error io.EOF will be
	// returned.
	Parse() (any, error)
	// ParseObject parses JSON from the front of the contained data as a
	// simply-typed JSON object and return it. If the JSON is a value of a type
	// other than object, an error will be returned. If the data is empty, the
	// exact error io.EOF will be returned.
	ParseObject() (map[string]any, error)
	// NextLine consumes whitespace up to the next newline, returning an error
	// if something other than whitespace exists before the next newline, or
	// returning the exact error io.EOF if the end of data is found first. This
	// method reads until exactly the next '\n' newline character, not any other
	// combination of '\r' and '\n'; it will work with "\r\n" and "\n" newlines
	// only.
	NextLine() error
	// IterLines returns a Range-func iterable for reading JSONL.
	//
	// Returns an iterable go1.22+ RangeFunc that yields each line of a JSONL
	// until the end of data. If an error occurs, it will be yielded on its own
	// and iteration will stop.
	//
	// See: https://go.dev/wiki/RangefuncExperiment
	IterLines() func(func(any, error) bool)
	// IterObjectLines returns a Range-func iterable for reading JSONL,
	// enforcing that each line must also be a JSON object rather than another
	// kind of JSON value.
	//
	// Returns an iterable go1.22+ RangeFunc that yields each line of a JSONL
	// until the end of data. If an error occurs, it will be yielded on its own
	// and iteration will stop.
	//
	// See: https://go.dev/wiki/RangefuncExperiment
	IterObjectLines() func(func(map[string]any, error) bool)
	// CheckEmpty checks that the remaining data is all whitespace, returning an
	// error if not.
	CheckEmpty() error
	// UnmarshalFull parses JSON from the front of the contained data, then
	// checks if there is any data left after. If there is, the value will still
	// be returned but there will be a "not empty" error. If the data is empty,
	// the exact error io.EOF will be returned.
	UnmarshalFull() (any, error)
	// Reset the parser with a new io.Reader.
	Reset(io.Reader)
	// ResetSlice resets the parser with a new byte slice.
	ResetSlice([]byte)
	// ResetString resets the parser with a new string.
	ResetString(string)
}