}

func rep(n int, b []byte) []byte { return bytes.Repeat(b, n) }
func join(b ...[]byte) []byte    { return bytes.Join(b, nil) }
func lit(x ...byte) []byte       { return x }

func TestTypeOfTypeOf(t *testing.T) {
	// Check that all the type constructors return concrete *rtype implementations.
	// It's difficult to test directly because the reflect package is only at arm's length.