}))
	t.Run("ParseComplex", checkNoAllocs(func() {
		Sink.Complex128, Sink.Error = ParseComplex(string(bytes.Number), 128)
	}))
	t.Run("CanBackquote", checkNoAllocs(func() {
		Sink.Bool = CanBackquote(string(bytes.String))
	}))
	t.Run("AppendQuote", checkNoAllocs(func() {
		Sink.Bytes = AppendQuote(bytes.Buffer[:0], string(bytes.String))
	}))

	if s, err := strconv.Atoi(v); err == nil {
		fmt.Printf("%T, %v", s, s)
	}

	// Output:
	// int, 10
}

func ExampleCanBackquote() {
	fmt.Println(strconv.CanBackquote("Fran & Freddie's Diner ☺"))
	fmt.Println(strconv.CanBackquote("`can't backquote this`"))

	// Output:
	// true
	// false
}

func ExampleFormatBool() {
	v := true
	s := strconv.FormatBool(v)
	fmt.Printf("%T, %v\n", s, s)

	{"a\xe0\xa0z", false},
	{"\ufeffabc", false},
	{"a\ufeffz", false},
}

func TestCanBackquote(t *testing.T) {
	for _, tt := range canbackquotetests {
		if out := CanBackquote(tt.in); out != tt.out {
			t.Errorf("CanBackquote(%q) = %v, want %v", tt.in, out, tt.out)
		}
	}
}

type unQuoteTest struct {
	in  string
	out string
}

var unquotetests = []unQuoteTest{
	{`""`, ""},

func AppendQuoteRuneToGraphic(dst []byte, r rune) []byte {
	return appendQuotedRuneWith(dst, r, '\'', false, true)
}

// CanBackquote reports whether the string s can be represented
// unchanged as a single-line backquoted string without control
// characters other than tab.
func CanBackquote(s string) bool {
	for len(s) > 0 {
		r, wid := utf8.DecodeRuneInString(s)
		s = s[wid:]
		if wid > 1 {
			if r == '\ufeff' {

// If f.sharp is set a raw (backquoted) string may be returned instead
// if the string does not contain any control characters other than tab.
func (f *fmt) fmtQ(s string) {
	s = f.truncateString(s)
	if f.sharp && strconv.CanBackquote(s) {
		f.padString("`" + s + "`")
		return
	}
	buf := f.intbuf[:0]
	if f.plus {
		f.pad(strconv.AppendQuoteToASCII(buf, s))
	} else {
		f.pad(strconv.AppendQuote(buf, s))
	}
}

	'#'	alternate format: add leading 0b for binary (%#b), 0 for octal (%#o),
		0x or 0X for hex (%#x or %#X); suppress 0x for %p (%#p);
		for %q, print a raw (backquoted) string if [strconv.CanBackquote]
		returns true;
		always print a decimal point for %e, %E, %f, %F, %g and %G;
		do not remove trailing zeros for %g and %G;
		write e.g. U+0078 'x' if the character is printable for %U (%#U)

	regexp, err := CompilePOSIX(str)
	if err != nil {
		panic(`regexp: CompilePOSIX(` + quote(str) + `): ` + err.Error())
	}
	return regexp
}

func quote(s string) string {
	if strconv.CanBackquote(s) {
		return "`" + s + "`"
	}
	return strconv.Quote(s)
}

// NumSubexp returns the number of parenthesized subexpressions in this [Regexp].
func (re *Regexp) NumSubexp() int {
	return re.numSubexp

		{"AppendQuoteRuneToASCII", Func, 0},
		{"AppendQuoteRuneToGraphic", Func, 6},
		{"AppendQuoteToASCII", Func, 0},
		{"AppendQuoteToGraphic", Func, 6},
		{"AppendUint", Func, 0},
		{"Atoi", Func, 0},
		{"CanBackquote", Func, 0},
		{"ErrRange", Var, 0},
		{"ErrSyntax", Var, 0},
		{"FormatBool", Func, 0},
		{"FormatComplex", Func, 15},
		{"FormatFloat", Func, 0},
		{"FormatInt", Func, 0},
		{"FormatUint", Func, 0},

pkg strconv, func AppendQuoteToASCII([]uint8, string) []uint8
pkg strconv, func AppendUint([]uint8, uint64, int) []uint8
pkg strconv, func Atoi(string) (int, error)
pkg strconv, func CanBackquote(string) bool
pkg strconv, func FormatBool(bool) string
pkg strconv, func FormatFloat(float64, uint8, int, int) string
pkg strconv, func FormatInt(int64, int) string
pkg strconv, func FormatUint(uint64, int) string