{in: "4/3."},
	{in: "4/"},
	{in: "13e-9223372036854775808"}, // CVE-2022-23772

	// valid
	{"0", "0", true},
	{"-0", "0", true},
	{"1", "1", true},
	{"-1", "-1", true},
	{"1.", "1", true},
	{"1e0", "1", true},
	{"1.e1", "10", true},
	{"-0.1", "-1/10", true},
	{"-.1", "-1/10", true},
	{"2/4", "1/2", true},
	{".25", "1/4", true},
	{"-1/5", "-1/5", true},
	{"8129567.7690E14", "812956776900000000000", true},

	{Float, ".42"},
	{Float, ".0123456789"},
	{Float, "0.0"},
	{Float, "1.0"},
	{Float, "42.0"},
	{Float, "01234567890.0"},
	{Float, "0e0"},
	{Float, "1e0"},
	{Float, "42e0"},
	{Float, "01234567890e0"},
	{Float, "0E0"},
	{Float, "1E0"},
	{Float, "42E0"},
	{Float, "01234567890E0"},
	{Float, "0e+10"},
	{Float, "1e-10"},
	{Float, "42e+10"},
	{Float, "01234567890e-10"},
	{Float, "0E+10"},

		{FloatLit, "0x.0", "0x.0", "hexadecimal mantissa requires a 'p' exponent"},
		{FloatLit, "0x1.1", "0x1.1", "hexadecimal mantissa requires a 'p' exponent"},
		{FloatLit, "0x1.1e0", "0x1.1e0", "hexadecimal mantissa requires a 'p' exponent"},
		{FloatLit, "0x1.2gp1a", "0x1.2 gp1a", "hexadecimal mantissa requires a 'p' exponent"},
		{FloatLit, "0x0p", "0x0p", "exponent has no digits"},

			t.Errorf("%v: got %q; want %q", test, got, test.want)
		}
	}
}

func BenchmarkParseFloatSmallExp(b *testing.B) {
	for i := 0; i < b.N; i++ {
		for _, s := range []string{
			"1e0",
			"1e-1",
			"1e-2",
			"1e-3",
			"1e-4",
			"1e-5",
			"1e-10",
			"1e-20",
			"1e-50",
			"1e1",
			"1e2",
			"1e3",
			"1e4",
			"1e5",
			"1e10",
			"1e20",

	}
	return bits, overflow
}

// Exact powers of 10.
var float64pow10 = []float64{
	1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
	1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
	1e20, 1e21, 1e22,
}
var float32pow10 = []float32{1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10}

// If possible to convert decimal representation to 64-bit float f exactly,

		{token.FLOAT, "0x.0", "0x.0", "hexadecimal mantissa requires a 'p' exponent"},
		{token.FLOAT, "0x1.1", "0x1.1", "hexadecimal mantissa requires a 'p' exponent"},
		{token.FLOAT, "0x1.1e0", "0x1.1e0", "hexadecimal mantissa requires a 'p' exponent"},
		{token.FLOAT, "0x1.2gp1a", "0x1.2 gp1a", "hexadecimal mantissa requires a 'p' exponent"},
		{token.FLOAT, "0x0p", "0x0p", "exponent has no digits"},

		got := string(fibo(n).utoa(10))
		if got != want {
			t.Errorf("fibo(%d) failed: got %s want %s", n, got, want)
		}
	}
}

func BenchmarkFibo(b *testing.B) {
	for i := 0; i < b.N; i++ {
		fibo(1e0)
		fibo(1e1)
		fibo(1e2)
		fibo(1e3)
		fibo(1e4)
		fibo(1e5)
	}
}

var bitTests = []struct {
	x    string
	i    uint
	want uint
}{
	{"0", 0, 0},
	{"0", 1, 0},

	0x2b800000, 0x2b8000b0, 0x2bf00000, 0x2bf0009c,
	0x2bf0009d, 0x2c000000, 0x2c0000b7, 0x2c200000,
	0x2c20004b, 0x2c400000, 0x2c4000a5, 0x2c500000,
	0x2c5000a5, 0x2c700000, 0x2c7000b9, 0x2d100000,
	// Entry 1E0 - 1FF
	0x2d1000a5, 0x2d100130, 0x2e900000, 0x2e9000a5,
	0x2ed00000, 0x2ed000cd, 0x2f100000, 0x2f1000c0,
	0x2f200000, 0x2f2000d2, 0x2f400000, 0x2f400052,
	0x2ff00000, 0x2ff000c3, 0x30400000, 0x3040009a,

	{0x645A1CAC083126E9, 0x83126E978D4FDF3B}, // 1e-3
	{0x3D70A3D70A3D70A3, 0xA3D70A3D70A3D70A}, // 1e-2
	{0xCCCCCCCCCCCCCCCC, 0xCCCCCCCCCCCCCCCC}, // 1e-1
	{0x0000000000000000, 0x8000000000000000}, // 1e0
	{0x0000000000000000, 0xA000000000000000}, // 1e1
	{0x0000000000000000, 0xC800000000000000}, // 1e2
	{0x0000000000000000, 0xFA00000000000000}, // 1e3
	{0x0000000000000000, 0x9C40000000000000}, // 1e4