BitmaskEnumTest.cpp
2.52 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
//===- llvm/unittest/ADT/BitmaskEnumTest.cpp - BitmaskEnum unit tests -----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/BitmaskEnum.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
enum Flags {
F0 = 0,
F1 = 1,
F2 = 2,
F3 = 4,
F4 = 8,
LLVM_MARK_AS_BITMASK_ENUM(F4)
};
TEST(BitmaskEnumTest, BitwiseOr) {
Flags f = F1 | F2;
EXPECT_EQ(3, f);
f = f | F3;
EXPECT_EQ(7, f);
}
TEST(BitmaskEnumTest, BitwiseOrEquals) {
Flags f = F1;
f |= F3;
EXPECT_EQ(5, f);
// |= should return a reference to the LHS.
f = F2;
(f |= F3) = F1;
EXPECT_EQ(F1, f);
}
TEST(BitmaskEnumTest, BitwiseAnd) {
Flags f = static_cast<Flags>(3) & F2;
EXPECT_EQ(F2, f);
f = (f | F3) & (F1 | F2 | F3);
EXPECT_EQ(6, f);
}
TEST(BitmaskEnumTest, BitwiseAndEquals) {
Flags f = F1 | F2 | F3;
f &= F1 | F2;
EXPECT_EQ(3, f);
// &= should return a reference to the LHS.
(f &= F1) = F3;
EXPECT_EQ(F3, f);
}
TEST(BitmaskEnumTest, BitwiseXor) {
Flags f = (F1 | F2) ^ (F2 | F3);
EXPECT_EQ(5, f);
f = f ^ F1;
EXPECT_EQ(4, f);
}
TEST(BitmaskEnumTest, BitwiseXorEquals) {
Flags f = (F1 | F2);
f ^= (F2 | F4);
EXPECT_EQ(9, f);
// ^= should return a reference to the LHS.
(f ^= F4) = F3;
EXPECT_EQ(F3, f);
}
TEST(BitmaskEnumTest, BitwiseNot) {
Flags f = ~F1;
EXPECT_EQ(14, f); // Largest value for f is 15.
EXPECT_EQ(15, ~F0);
}
enum class FlagsClass {
F0 = 0,
F1 = 1,
F2 = 2,
F3 = 4,
LLVM_MARK_AS_BITMASK_ENUM(F3)
};
TEST(BitmaskEnumTest, ScopedEnum) {
FlagsClass f = (FlagsClass::F1 & ~FlagsClass::F0) | FlagsClass::F2;
f |= FlagsClass::F3;
EXPECT_EQ(7, static_cast<int>(f));
}
struct Container {
enum Flags { F0 = 0, F1 = 1, F2 = 2, F3 = 4, LLVM_MARK_AS_BITMASK_ENUM(F3) };
static Flags getFlags() {
Flags f = F0 | F1;
f |= F2;
return f;
}
};
TEST(BitmaskEnumTest, EnumInStruct) { EXPECT_EQ(3, Container::getFlags()); }
} // namespace
namespace foo {
namespace bar {
namespace {
enum FlagsInNamespace {
F0 = 0,
F1 = 1,
F2 = 2,
F3 = 4,
LLVM_MARK_AS_BITMASK_ENUM(F3)
};
} // namespace
} // namespace foo
} // namespace bar
namespace {
TEST(BitmaskEnumTest, EnumInNamespace) {
foo::bar::FlagsInNamespace f = ~foo::bar::F0 & (foo::bar::F1 | foo::bar::F2);
f |= foo::bar::F3;
EXPECT_EQ(7, f);
}
} // namespace