func ExampleEqualFold() {
	fmt.Println(bytes.EqualFold([]byte("Go"), []byte("go")))
	// Output: true
}

func ExampleFields() {
	fmt.Printf("Fields are: %q", bytes.Fields([]byte("  foo bar  baz   ")))
	// Output: Fields are: ["foo" "bar" "baz"]
}

func ExampleFieldsFunc() {
	f := func(c rune) bool {
		return !unicode.IsLetter(c) && !unicode.IsNumber(c)
	}

		p.expectOperandEnd()
		return
	}

	// Constant.
	haveConstant := false
	switch tok.ScanToken {
	case scanner.Int, scanner.Float, scanner.String, scanner.Char, '+', '-', '~':
		haveConstant = true
	case '(':
		// Could be parenthesized expression or (R). Must be something, though.
		tok := p.next()
		if tok.ScanToken == scanner.EOF {

or misaligned data, are omitted in the Go struct, replaced by
appropriate padding to reach the next field or the end of the struct.

The standard C numeric types are available under the names
C.char, C.schar (signed char), C.uchar (unsigned char),
C.short, C.ushort (unsigned short), C.int, C.uint (unsigned int),
C.long, C.ulong (unsigned long), C.longlong (long long),
C.ulonglong (unsigned long long), C.float, C.double,

		{"210 path=" + longName + "\nabc", "abc", "path", longName, true},
		{"110 path=" + medName + "\n", "", "path", medName, true},
		{"9 foo=ba\n", "", "foo", "ba", true},
		{"11 foo=bar\n\x00", "\x00", "foo", "bar", true},
		{"18 foo=b=\nar=\n==\x00\n", "", "foo", "b=\nar=\n==\x00", true},
		{"27 foo=hello9 foo=ba\nworld\n", "", "foo", "hello9 foo=ba\nworld", true},

	{"[X0-AX]", "[X0-AX]"},
	{"[AX-X0]", "[AX-X0]"},
	{"[):[o-FP", ""}, // Issue 12469 - asm hung parsing the o-FP range on non ARM platforms.
}

var amd64RuntimeOperandTests = []operandTest{
	{"$bar<ABI0>(SB)", "$bar<ABI0>(SB)"},
	{"$foo<ABIInternal>(SB)", "$foo<ABIInternal>(SB)"},
}

var amd64BadOperandTests = []badOperandTest{
	{"[", "register list: expected ']', found EOF"},

		Mode:   0755 | fs.ModeSymlink,
	},
	{
		Name:   "device",
		Data:   []byte("device file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeDevice,
	},
	{
		Name:   "chardevice",
		Data:   []byte("char device file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeDevice | fs.ModeCharDevice,
	},
}

func TestWriter(t *testing.T) {
	largeData := make([]byte, 1<<17)
	if _, err := rand.Read(largeData); err != nil {

			ChangeTime: time.Unix(1441973436, 0),
			Format:     FormatGNU,
		}},
	}, {
		// Matches the behavior of GNU and BSD tar utilities.
		file: "testdata/pax-multi-hdrs.tar",
		headers: []*Header{{
			Name:     "bar",
			Linkname: "PAX4/PAX4/long-linkpath-name",
			ModTime:  time.Unix(0, 0),
			Typeflag: '2',
			PAXRecords: map[string]string{
				"linkpath": "PAX4/PAX4/long-linkpath-name",
			},
			Format: FormatPAX,

	if !bytes.Contains(buf.Bytes(), []byte("PaxHeaders.0")) {
		t.Fatal("Expected at least one PAX header to be written.")
	}

	// xattr bar should always appear before others
	indices := []int{
		bytes.Index(buf.Bytes(), []byte("bar=bar")),
		bytes.Index(buf.Bytes(), []byte("baz=baz")),
		bytes.Index(buf.Bytes(), []byte("foo=foo")),
		bytes.Index(buf.Bytes(), []byte("qux=qux")),
	}

		formats: FormatUSTAR | FormatPAX | FormatGNU,
	}, {
		header:  &Header{Xattrs: map[string]string{"foo": "bar"}},
		paxHdrs: map[string]string{paxSchilyXattr + "foo": "bar"},
		formats: FormatPAX,
	}, {
		header:  &Header{Xattrs: map[string]string{"foo": "bar"}, Format: FormatGNU},
		paxHdrs: map[string]string{paxSchilyXattr + "foo": "bar"},
		formats: FormatUnknown,
	}, {
		header:  &Header{Xattrs: map[string]string{"用戶名": "\x00hello"}},

			s = "unsafe.Pointer"
		case types.UntypedBool:
			s = "ideal-bool"
		case types.UntypedInt:
			s = "ideal-int"
		case types.UntypedRune:
			// "ideal-char" for compatibility with old tool
			// TODO(gri) change to "ideal-rune"
			s = "ideal-char"
		case types.UntypedFloat:
			s = "ideal-float"
		case types.UntypedComplex:
			s = "ideal-complex"
		case types.UntypedString:
			s = "ideal-string"