// CharsetReader's result values must be non-nil.
	CharsetReader func(charset string, input io.Reader) (io.Reader, error)

	// DefaultSpace sets the default name space used for unadorned tags,
	// as if the entire XML stream were wrapped in an element containing
	// the attribute xmlns="DefaultSpace".
	DefaultSpace string

	r              io.ByteReader
	t              TokenReader
	buf            bytes.Buffer

	},
}

func TestUnmarshalNS(t *testing.T) {
	for i, tt := range tables {
		var dst Tables
		var err error
		if tt.ns != "" {
			d := NewDecoder(strings.NewReader(tt.xml))
			d.DefaultSpace = tt.ns
			err = d.Decode(&dst)
		} else {
			err = Unmarshal([]byte(tt.xml), &dst)
		}
		if err != nil {
			t.Errorf("#%d: Unmarshal: %v", i, err)
			continue
		}
		want := tt.tab

		{"CharData", Type, 0},
		{"Comment", Type, 0},
		{"CopyToken", Func, 0},
		{"Decoder", Type, 0},
		{"Decoder.AutoClose", Field, 0},
		{"Decoder.CharsetReader", Field, 0},
		{"Decoder.DefaultSpace", Field, 1},
		{"Decoder.Entity", Field, 0},
		{"Decoder.Strict", Field, 0},
		{"Directive", Type, 0},
		{"Encoder", Type, 0},
		{"EndElement", Type, 0},
		{"EndElement.Name", Field, 0},