func syntaxError(fn, str string) *NumError {
	return &NumError{fn, stringslite.Clone(str), ErrSyntax}
}

func rangeError(fn, str string) *NumError {
	return &NumError{fn, stringslite.Clone(str), ErrRange}
}

func baseError(fn, str string, base int) *NumError {
	return &NumError{fn, stringslite.Clone(str), errors.New("invalid base " + Itoa(base))}
}

		if test.err != nil {
			test.err = &NumError{"ParseUint", test.in, test.err}
		}
	}
	for i := range parseUint64BaseTests {
		test := &parseUint64BaseTests[i]
		if test.err != nil {
			test.err = &NumError{"ParseUint", test.in, test.err}
		}
	}
	for i := range parseInt64Tests {
		test := &parseInt64Tests[i]
		if test.err != nil {
			test.err = &NumError{"ParseInt", test.in, test.err}
		}
	}

		b, e := ParseBool(test.in)
		if test.err != nil {
			// expect an error
			if e == nil {
				t.Errorf("ParseBool(%s) = nil; want %s", test.in, test.err)
			} else {
				// NumError assertion must succeed; it's the only thing we return.
				if e.(*NumError).Err != test.err {
					t.Errorf("ParseBool(%s) = %s; want %s", test.in, e, test.err)
				}
			}
		} else {
			if e != nil {
				t.Errorf("ParseBool(%s) = %s; want nil", test.in, e)

const fnParseComplex = "ParseComplex"

// convErr splits an error returned by parseFloatPrefix
// into a syntax or range error for ParseComplex.
func convErr(err error, s string) (syntax, range_ error) {
	if x, ok := err.(*NumError); ok {
		x.Func = fnParseComplex
		x.Num = stringslite.Clone(s)
		if x.Err == ErrRange {
			return nil, x
		}
	}
	return err, nil
}

// ParseComplex converts the string s to a complex number

	buf := make([]byte, 64)
	buf2 := make([]byte, 64)
	id := make([]byte, 8)
	zero := make([]byte, 8)
	for i := range id {
		id[i] = byte(i)
	}
	numError := 0
	errorf := func(msg string, args ...any) {
		t.Errorf(msg, args...)
		if numError++; numError > 20 {
			t.Logf("stopping after too many errors")
			t.FailNow()
		}
	}
	for bufSize := len(id); bufSize <= len(buf); bufSize++ {
		for j := range buf {

		{errBool, "ParseBool"},
		{errFloat, "ParseFloat"},
		{errInt64, "ParseInt"},
		{errUint64, "ParseUint"},
	}

	for _, v := range vectors {
		nerr, ok := v.err.(*NumError)
		if !ok {
			t.Errorf("test %s, error was not a *NumError", v.want)
			continue
		}
		if got := nerr.Func; got != v.want {
			t.Errorf("mismatching Func: got %s, want %s", got, v.want)
		}
	}

// errRange is returned by Set if a flag's value is out of range.
// It then gets wrapped through failf to provide more information.
var errRange = errors.New("value out of range")

func numError(err error) error {
	ne, ok := err.(*strconv.NumError)
	if !ok {
		return err
	}
	if ne.Err == strconv.ErrSyntax {
		return errParse
	}
	if ne.Err == strconv.ErrRange {
		return errRange
	}
	return err
}

		{"1e+4294967296+1e+4294967296i", infpp, ErrRange},
		{"1e+4294967296-1e+4294967296i", infpm, ErrRange},
	}
	for i := range tests {
		test := &tests[i]
		if test.err != nil {
			test.err = &NumError{Func: "ParseComplex", Num: test.in, Err: test.err}
		}
		got, err := ParseComplex(test.in, 128)
		if !reflect.DeepEqual(err, test.err) {

// (Parsing a hexadecimal floating-point value only rounds when
// there are more bits in the hexadecimal representation than
// will fit in the mantissa.)
//
// The errors that ParseFloat returns have concrete type *NumError
// and include err.Num = s.
//
// If s is not syntactically well-formed, ParseFloat returns err.Err = ErrSyntax.
//
// If s is syntactically well-formed but is more than 1/2 ULP

	// value: "
	// multibyte: false
	// tail: Fran & Freddie's Diner\"
}

func ExampleNumError() {
	str := "Not a number"
	if _, err := strconv.ParseFloat(str, 64); err != nil {
		e := err.(*strconv.NumError)
		fmt.Println("Func:", e.Func)
		fmt.Println("Num:", e.Num)
		fmt.Println("Err:", e.Err)
		fmt.Println(err)
	}

	// Output:
	// Func: ParseFloat
	// Num: Not a number
	// Err: invalid syntax