case Bool, Int, Uint, Int8, Uint8, Int16, Uint16, Int32, Uint32, Uintptr:
		return a.assignIntN(offset, t.Size(), 1, 0b0)
	case Int64, Uint64:
		switch goarch.PtrSize {
		case 4:
			return a.assignIntN(offset, 4, 2, 0b0)
		case 8:
			return a.assignIntN(offset, 8, 1, 0b0)
		}
	case Float32, Float64:
		return a.assignFloatN(offset, t.Size(), 1)
	case Complex64:
		return a.assignFloatN(offset, 4, 2)

		{"1p10", 1 << 10},
		{"1p+10", 1 << 10},
		{"+1p-10", 1.0 / (1 << 10)},
		{"1024p-12", 0.25},
		{"-1p10", -1024},
		{"1.5p1", 3},

		// binary mantissa, decimal exponent
		{"0b0", 0},
		{"-0b0", -zero_},
		{"0b0e+10", 0},
		{"-0b0e-10", -zero_},
		{"0b1010", 10},
		{"0B1010E2", 1000},
		{"0b.1", 0.5},
		{"0b.001", 0.125},
		{"0b.001e3", 125},

		// binary mantissa, binary exponent

	{"012.345", 10, true, nat{12345}, 10, -3, nil, 0},
	{"0.1", 0, true, nat{1}, 10, -1, nil, 0},
	{"0.1", 2, true, nat{1}, 2, -1, nil, 0},
	{"0.12", 2, true, nat{1}, 2, -1, nil, '2'},
	{"0b0.1", 0, true, nat{1}, 2, -1, nil, 0},
	{"0B0.12", 0, true, nat{1}, 2, -1, nil, '2'},
	{"0o0.7", 0, true, nat{7}, 8, -1, nil, 0},
	{"0O0.78", 0, true, nat{7}, 8, -1, nil, '8'},
	{"0xdead.beef", 0, true, nat{0xdeadbeef}, 16, -4, nil, 0},

	`0O01234567 = 01234567`,

	`0o_0 = 0`,
	`0o_1234 = 01234`,
	`0o0123_4567 = 01234567`,

	`0O_0 = 0`,
	`0O_1234 = 01234`,
	`0O0123_4567 = 01234567`,

	// binaries
	`0b0 = 0`,
	`0b1011 = 0xb`,
	`0b00101101 = 0x2d`,

	`0B0 = 0`,
	`0B1011 = 0xb`,
	`0B00101101 = 0x2d`,

	`0b_0 = 0`,
	`0b10_11 = 0xb`,
	`0b_0010_1101 = 0x2d`,
}

		}
	}
}

func TestNumbers(t *testing.T) {
	for _, test := range []struct {
		kind             LitKind
		src, tokens, err string
	}{
		// binaries
		{IntLit, "0b0", "0b0", ""},
		{IntLit, "0b1010", "0b1010", ""},
		{IntLit, "0B1110", "0B1110", ""},

		{IntLit, "0b", "0b", "binary literal has no digits"},
		{IntLit, "0b0190", "0b0190", "invalid digit '9' in binary literal"},

	{"00", "0", 0, 0, true},
	{"0", "0", 8, 0, true},
	{"07", "7", 0, 7, true},
	{"7", "7", 8, 7, true},
	{"023", "19", 0, 19, true},
	{"23", "23", 8, 19, true},
	{"cafebabe", "cafebabe", 16, 0xcafebabe, true},
	{"0b0", "0", 0, 0, true},
	{"-111", "-111", 2, -7, true},
	{"-0b111", "-7", 0, -7, true},
	{"0b1001010111", "599", 0, 0x257, true},
	{"1001010111", "1001010111", 2, 0x257, true},
	{"A", "a", 36, 10, true},

	for r := s.Scan(); r != EOF; r = s.Scan() {
	}
}

func TestNumbers(t *testing.T) {
	for _, test := range []struct {
		tok              rune
		src, tokens, err string
	}{
		// binaries
		{Int, "0b0", "0b0", ""},
		{Int, "0b1010", "0b1010", ""},
		{Int, "0B1110", "0B1110", ""},

		{Int, "0b", "0b", "binary literal has no digits"},
		{Int, "0b0190", "0b0190", "invalid digit '9' in binary literal"},

				}
			}
		})
	}
}

func TestNumbers(t *testing.T) {
	for _, test := range []struct {
		tok              token.Token
		src, tokens, err string
	}{
		// binaries
		{token.INT, "0b0", "0b0", ""},
		{token.INT, "0b1010", "0b1010", ""},
		{token.INT, "0B1110", "0B1110", ""},

		{token.INT, "0b", "0b", "binary literal has no digits"},
		{token.INT, "0b0190", "0b0190", "invalid digit '9' in binary literal"},