// An EmptyOp specifies a kind or mixture of zero-width assertions.
type EmptyOp uint8

const (
	EmptyBeginLine EmptyOp = 1 << iota
	EmptyEndLine
	EmptyBeginText
	EmptyEndText
	EmptyWordBoundary
	EmptyNoWordBoundary
)

// EmptyOpContext returns the zero-width assertions
// satisfied at the position between the runes r1 and r2.
// Passing r1 == -1 indicates that the position is
// at the beginning of the text.

		{"Compile", Func, 0},
		{"DotNL", Const, 0},
		{"EmptyBeginLine", Const, 0},
		{"EmptyBeginText", Const, 0},
		{"EmptyEndLine", Const, 0},
		{"EmptyEndText", Const, 0},
		{"EmptyNoWordBoundary", Const, 0},
		{"EmptyOp", Type, 0},
		{"EmptyOpContext", Func, 0},
		{"EmptyWordBoundary", Const, 0},
		{"ErrInternalError", Const, 0},
		{"ErrInvalidCharClass", Const, 0},