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
|
// RUN: %clang_cc1 -fexperimental-new-constant-interpreter -verify=expected,both %s
// RUN: %clang_cc1 -verify=ref,both %s
constexpr int dummy = 1;
constexpr const int *null = nullptr;
namespace simple {
__attribute__((nonnull))
constexpr int simple1(const int*) {
return 1;
}
static_assert(simple1(&dummy) == 1, "");
static_assert(simple1(nullptr) == 1, ""); // both-error {{not an integral constant expression}} \
// both-note {{null passed to a callee}}
static_assert(simple1(null) == 1, ""); // both-error {{not an integral constant expression}} \
// both-note {{null passed to a callee}}
__attribute__((nonnull)) // both-warning {{applied to function with no pointer arguments}}
constexpr int simple2(const int &a) {
return 12;
}
static_assert(simple2(1) == 12, "");
}
namespace methods {
struct S {
__attribute__((nonnull(2))) // both-warning {{only applies to pointer arguments}}
__attribute__((nonnull(3)))
constexpr int foo(int a, const void *p) const {
return 12;
}
__attribute__((nonnull(3)))
constexpr int foo2(...) const {
return 12;
}
__attribute__((nonnull))
constexpr int foo3(...) const {
return 12;
}
};
constexpr S s{};
static_assert(s.foo(8, &dummy) == 12, "");
static_assert(s.foo2(nullptr) == 12, "");
static_assert(s.foo2(1, nullptr) == 12, ""); // both-error {{not an integral constant expression}} \
// both-note {{null passed to a callee}}
constexpr S *s2 = nullptr;
static_assert(s2->foo3() == 12, ""); // both-error {{not an integral constant expression}} \
// both-note {{member call on dereferenced null pointer}}
}
namespace fnptrs {
__attribute__((nonnull))
constexpr int add(int a, const void *p) {
return a + 1;
}
__attribute__((nonnull(3)))
constexpr int applyBinOp(int a, int b, int (*op)(int, const void *)) {
return op(a, nullptr); // both-note {{null passed to a callee}}
}
static_assert(applyBinOp(10, 20, add) == 11, ""); // both-error {{not an integral constant expression}} \
// both-note {{in call to}}
static_assert(applyBinOp(10, 20, nullptr) == 11, ""); // both-error {{not an integral constant expression}} \
// both-note {{null passed to a callee}}
}
namespace lambdas {
auto lstatic = [](const void *P) __attribute__((nonnull)) { return 3; };
static_assert(lstatic(nullptr) == 3, ""); // both-error {{not an integral constant expression}} \
// both-note {{null passed to a callee}}
}
|
