input

type Input interface {
	// Step returns the rune starting at pos and its width. Unless
	// CanCheckPrefix is true, Step should always be called with
	// with the current position in the string, which is the sum
	// of the previous pos Step was called with, and the width
	// returned by that call.
	Step(pos int) (r rune, width int)

	// CanCheckInput reports whether we can look ahead without losing info.
	CanCheckPrefix() bool

	// HasPrefix reports whether the input has the prefix reported
	// by the Prefixer.
	HasPrefix(p Prefixer) bool

	// Index returns the index of the first occurence of the
	// prefix following pos, or -1 if it can't be found.
	Index(p Prefixer, pos int) int

	// Context returns the EmptyOp flags satisfied by the context at pos.
	Context(pos int) syntax.EmptyOp
}

type InputBytes struct {
	// contains filtered or unexported fields
}

type InputReader struct {
	// contains filtered or unexported fields
}

type InputString struct {
	// contains filtered or unexported fields
}

type Prefixer interface {
	Prefix() string
	PrefixBytes() []byte
}

type Rinput interface {
	Input

	Rstep(pos int) (r rune, width int)
}