for i := rune(0); i <= MaxLatin1; i++ {
		got := IsControl(i)
		want := false
		switch {
		case 0x00 <= i && i <= 0x1F:
			want = true
		case 0x7F <= i && i <= 0x9F:
			want = true
		}
		if got != want {
			t.Errorf("%U incorrect: got %t; want %t", i, got, want)
		}
	}
}

func TestIsLetterLatin1(t *testing.T) {
	for i := rune(0); i <= MaxLatin1; i++ {
		got := IsLetter(i)

// such as surrogates; use [Is](C, r) to test for them.
func IsControl(r rune) bool {
	if uint32(r) <= MaxLatin1 {
		return properties[uint8(r)]&pC != 0
	}
	// All control characters are < MaxLatin1.
	return false
}

// IsLetter reports whether the rune is a letter (category [L]).
func IsLetter(r rune) bool {
	if uint32(r) <= MaxLatin1 {
		return properties[uint8(r)]&(pLmask) != 0
	}
	return isExcludingLatin(Letter, r)
}

func IsUpper(r rune) bool {
	// See comment in IsGraphic.
	if uint32(r) <= MaxLatin1 {
		return properties[uint8(r)]&pLmask == pLu
	}
	return isExcludingLatin(Upper, r)
}

// IsLower reports whether the rune is a lower case letter.
func IsLower(r rune) bool {
	// See comment in IsGraphic.
	if uint32(r) <= MaxLatin1 {
		return properties[uint8(r)]&pLmask == pLl
	}
	return isExcludingLatin(Lower, r)
}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package unicode

// IsDigit reports whether the rune is a decimal digit.
func IsDigit(r rune) bool {
	if r <= MaxLatin1 {
		return '0' <= r && r <= '9'
	}
	return isExcludingLatin(Digit, r)

		// P: GREEK QUESTION MARK
		0x037E,
		// S: MODIFIER LETTER LEFT ARROWHEAD
		0x02C2,
		// Z: OGHAM SPACE MARK
		0x1680,
	}
	for i := 0; i < MaxLatin1+len(nonLatin1); i++ {
		base := uint32(i)
		if i >= MaxLatin1 {
			base = nonLatin1[i-MaxLatin1]
		}

		// Note r is negative, but uint8(r) == uint8(base) and
		// uint16(r) == uint16(base).
		r := rune(base - 1<<31)
		if Is(Letter, r) {

			t.Errorf("IsDigit(U+%04X) = true, want false", r)
		}
	}
}

// Test that the special case in IsDigit agrees with the table
func TestDigitOptimization(t *testing.T) {
	for i := rune(0); i <= MaxLatin1; i++ {
		if Is(Digit, i) != IsDigit(i) {
			t.Errorf("IsDigit(U+%04X) disagrees with Is(Digit)", i)
		}
	}

var M <type 1>;
var Mahajani <type 1>;
var Malayalam <type 1>;
var Mandaic <type 1>;
var Manichaean <type 1>;
var Marchen <type 1>;
var Mark <type 1>;
const MaxASCII = 127' ;
const MaxCase = 3 ;
const MaxLatin1 = 255' ;
const MaxRune = 1114111' ;
var Mc <type 1>;
var Me <type 1>;
var Meetei_Mayek <type 1>;
var Mende_Kikakui <type 1>;
var Meroitic_Cursive <type 1>;
var Meroitic_Hieroglyphs <type 1>;

	})
}

func FuzzRuneRoundTrip(f *testing.F) {
	f.Add(rune(-1))
	f.Add(rune(0xd800))
	f.Add(rune(0xdfff))
	f.Add(rune(unicode.ReplacementChar))
	f.Add(rune(unicode.MaxASCII))
	f.Add(rune(unicode.MaxLatin1))
	f.Add(rune(unicode.MaxRune))
	f.Add(rune(unicode.MaxRune + 1))
	f.Add(rune(-0x80000000))
	f.Add(rune(0x7fffffff))

	f.Fuzz(func(t *testing.T, r1 rune) {
		b := marshalCorpusFile(r1)

	{0x118C0, 0x118DF, d{-32, 0, -32}},
	{0x16E40, 0x16E5F, d{0, 32, 0}},
	{0x16E60, 0x16E7F, d{-32, 0, -32}},
	{0x1E900, 0x1E921, d{0, 34, 0}},
	{0x1E922, 0x1E943, d{-34, 0, -34}},
}
var properties = [MaxLatin1 + 1]uint8{
	0x00: pC,       // '\x00'
	0x01: pC,       // '\x01'
	0x02: pC,       // '\x02'
	0x03: pC,       // '\x03'
	0x04: pC,       // '\x04'
	0x05: pC,       // '\x05'
	0x06: pC,       // '\x06'

		{"Mandaic", Var, 0},
		{"Manichaean", Var, 4},
		{"Marchen", Var, 7},
		{"Mark", Var, 0},
		{"Masaram_Gondi", Var, 10},
		{"MaxASCII", Const, 0},
		{"MaxCase", Const, 0},
		{"MaxLatin1", Const, 0},
		{"MaxRune", Const, 0},
		{"Mc", Var, 0},
		{"Me", Var, 0},
		{"Medefaidrin", Var, 13},
		{"Meetei_Mayek", Var, 0},
		{"Mende_Kikakui", Var, 4},
		{"Meroitic_Cursive", Var, 1},