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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/* Self tests for offset types for GDB, the GNU debugger.
Copyright (C) 2017-2020 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbsupport/selftest.h"
#include "gdbsupport/offset-type.h"
#include "gdbsupport/underlying.h"
#include "gdbsupport/valid-expr.h"
namespace selftests {
namespace offset_type {
DEFINE_OFFSET_TYPE (off_A, unsigned int);
DEFINE_OFFSET_TYPE (off_B, unsigned int);
/* First, compile-time tests that:
- make sure that incorrect operations with mismatching types are
caught at compile time.
- make sure that the same operations but involving the right types
do compile and that they return the correct type.
*/
#define CHECK_VALID(VALID, EXPR_TYPE, EXPR) \
CHECK_VALID_EXPR_2 (off_A, off_B, VALID, EXPR_TYPE, EXPR)
off_A lval_a {};
off_B lval_b {};
using undrl = std::underlying_type<off_A>::type;
/* Offset +/- underlying. */
CHECK_VALID (true, off_A, off_A {} + undrl {});
CHECK_VALID (true, off_A, off_A {} - undrl {});
CHECK_VALID (true, off_A, undrl {} + off_A {});
CHECK_VALID (true, off_A, undrl {} - off_A {});
/* Add offset types. Both same and different. */
CHECK_VALID (false, void, off_A {} + off_A {});
CHECK_VALID (false, void, off_A {} + off_B {});
/* Subtract offset types. Both same and different. */
CHECK_VALID (false, void, off_B {} - off_A {});
CHECK_VALID (true, undrl, off_A {} - off_A {});
/* Add/assign offset types. Both same and different. */
CHECK_VALID (false, void, lval_a += off_A {});
CHECK_VALID (false, void, lval_a += off_B {});
CHECK_VALID (false, void, lval_a -= off_A {});
CHECK_VALID (false, void, lval_a -= off_B {});
/* operator OP+= (offset, underlying), lvalue ref on the lhs. */
CHECK_VALID (true, off_A&, lval_a += undrl {});
CHECK_VALID (true, off_A&, lval_a -= undrl {});
/* operator OP+= (offset, underlying), rvalue ref on the lhs. */
CHECK_VALID (false, void, off_A {} += undrl {});
CHECK_VALID (false, void, off_A {} -= undrl {});
/* Rel ops, with same type. */
CHECK_VALID (true, bool, off_A {} < off_A {});
CHECK_VALID (true, bool, off_A {} > off_A {});
CHECK_VALID (true, bool, off_A {} <= off_A {});
CHECK_VALID (true, bool, off_A {} >= off_A {});
/* Rel ops, with unrelated offset types. */
CHECK_VALID (false, void, off_A {} < off_B {});
CHECK_VALID (false, void, off_A {} > off_B {});
CHECK_VALID (false, void, off_A {} <= off_B {});
CHECK_VALID (false, void, off_A {} >= off_B {});
/* Rel ops, with unrelated types. */
CHECK_VALID (false, void, off_A {} < undrl {});
CHECK_VALID (false, void, off_A {} > undrl {});
CHECK_VALID (false, void, off_A {} <= undrl {});
CHECK_VALID (false, void, off_A {} >= undrl {});
static void
run_tests ()
{
/* Test op+ and op-. */
{
constexpr off_A a {};
static_assert (to_underlying (a) == 0, "");
{
constexpr off_A res1 = a + 2;
static_assert (to_underlying (res1) == 2, "");
constexpr off_A res2 = res1 - 1;
static_assert (to_underlying (res2) == 1, "");
}
{
constexpr off_A res1 = 2 + a;
static_assert (to_underlying (res1) == 2, "");
constexpr off_A res2 = 3 - res1;
static_assert (to_underlying (res2) == 1, "");
}
}
/* Test op+= and op-=. */
{
off_A o {};
o += 10;
SELF_CHECK (to_underlying (o) == 10);
o -= 5;
SELF_CHECK (to_underlying (o) == 5);
}
/* Test op-. */
{
constexpr off_A o1 = (off_A) 10;
constexpr off_A o2 = (off_A) 20;
constexpr unsigned int delta = o2 - o1;
static_assert (delta == 10, "");
}
/* Test <, <=, >, >=. */
{
constexpr off_A o1 = (off_A) 10;
constexpr off_A o2 = (off_A) 20;
static_assert (o1 < o2, "");
static_assert (!(o2 < o1), "");
static_assert (o2 > o1, "");
static_assert (!(o1 > o2), "");
static_assert (o1 <= o2, "");
static_assert (!(o2 <= o1), "");
static_assert (o2 >= o1, "");
static_assert (!(o1 >= o2), "");
static_assert (o1 <= o1, "");
static_assert (o1 >= o1, "");
}
}
} /* namespace offset_type */
} /* namespace selftests */
void _initialize_offset_type_selftests ();
void
_initialize_offset_type_selftests ()
{
selftests::register_test ("offset_type", selftests::offset_type::run_tests);
}
|
