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
180
181
182
183
184
185
186
187
|
// RUN: %clang_cc1 -triple=x86_64-unknown-unknown -o - %s -std=gnu++17 -fsyntax-only -verify -fexperimental-new-constant-interpreter
// RUN: %clang_cc1 -triple=x86_64-unknown-unknown -o - %s -std=gnu++20 -fsyntax-only -verify -fexperimental-new-constant-interpreter
// RUN: %clang_cc1 -triple=x86_64-unknown-unknown -o - %s -std=gnu++17 -fsyntax-only -verify
// RUN: %clang_cc1 -triple=x86_64-unknown-unknown -o - %s -std=gnu++20 -fsyntax-only -verify
namespace test0 {
struct Indestructible {
// Indestructible();
~Indestructible() = delete; // expected-note 2{{deleted}}
};
Indestructible make_indestructible();
void test() {
// no crash.
int s = sizeof(make_indestructible()); // expected-error {{deleted}}
constexpr int ss = sizeof(make_indestructible()); // expected-error {{deleted}}
static_assert(ss, "");
int array[ss];
}
}
namespace test1 {
constexpr int foo() { return 1; } // expected-note {{candidate function not viable}}
// verify the "not an integral constant expression" diagnostic is suppressed.
static_assert(1 == foo(1), ""); // expected-error {{no matching function}}
}
namespace test2 {
void foo(); // expected-note 3{{requires 0 arguments}}
void func() {
// verify that "field has incomplete type" diagnostic is suppressed.
typeof(foo(42)) var; // expected-error {{no matching function}} \
// FIXME: suppress the "cannot initialize a variable" diagnostic.
int a = foo(1); // expected-error {{no matching function}} \
// expected-error {{cannot initialize a variable of type}}
// FIXME: suppress the "invalid application" diagnostic.
int s = sizeof(foo(42)); // expected-error {{no matching function}} \
// expected-error {{invalid application of 'sizeof'}}
};
}
namespace test3 {
template <int N>
constexpr int templated() __attribute__((enable_if(N, ""))) { // expected-note {{candidate disabled}}
return 1;
}
// verify that "constexpr variable must be initialized" diagnostic is suppressed.
constexpr int A = templated<0>(); // expected-error{{no matching function}}
template <typename T>
struct AA {
template <typename U>
static constexpr int getB() { // expected-note{{candidate template ignored}}
return 2;
}
static constexpr int foo2() {
return AA<T>::getB(); // expected-error{{no matching function for call to 'getB'}}
}
};
// FIXME: should we suppress the "be initialized by a constant expression" diagnostic?
constexpr auto x2 = AA<int>::foo2(); // expected-error {{be initialized by a constant expression}} \
// expected-note {{in instantiation of member function}}
}
// verify no assertion failure on violating value category.
namespace test4 {
int &&f(int); // expected-note {{candidate function not viable}}
int &&k = f(); // expected-error {{no matching function for call}}
}
// verify that "type 'double' cannot bind to a value of unrelated type 'int'" diagnostic is suppressed.
namespace test5 {
template<typename T> using U = T; // expected-note {{template parameter is declared here}}
template<typename...Ts> U<Ts...>& f(); // expected-error {{pack expansion used as argument for non-pack parameter of alias template}}
double &s1 = f(); // expected-error {{no matching function}}
}
namespace test6 {
struct T {
T() = delete; // expected-note {{has been explicitly marked deleted here}}
};
void func() {
// verify that no -Wunused-value diagnostic.
(T(T())); // expected-error {{call to deleted constructor}}
}
}
// verify the secondary diagnostic "no matching function" is emitted.
namespace test7 {
struct C {
C() = delete; // expected-note {{has been explicitly marked deleted}}
};
void f(C &); // expected-note {{candidate function not viable: expects an lvalue for 1st argument}}
void test() {
f(C()); // expected-error {{call to deleted constructor}} \
expected-error {{no matching function for call}}
}
}
// verify the secondary diagnostic "cannot initialize" is emitted.
namespace test8 {
typedef int arr[];
int v = arr(); // expected-error {{array types cannot be value-initialized}} \
expected-error {{cannot initialize a variable of type 'int' with an rvalue of type 'arr'}}
}
namespace test9 {
auto f(); // expected-note {{candidate function not viable}}
// verify no crash on evaluating the size of undeduced auto type.
static_assert(sizeof(f(1)), ""); // expected-error {{no matching function for call to 'f'}}
}
namespace test10 {
// Ensure we don't assert here.
int f(); // expected-note {{candidate}}
template<typename T> const int k = f(T()); // expected-error {{no matching function}}
static_assert(k<int> == 1, ""); // expected-note {{instantiation of}}
}
namespace test11 {
// Verify we do not assert()-fail here.
template <class T> void foo(T &t);
template <typename T>
void bar(T t) {
foo(t);
}
template <typename T = void *>
struct S { // expected-note {{candidate}}
S(T t); // expected-note {{candidate}}
~S();
};
template <typename T> S(T t) -> S<void *>;
void baz() {
bar(S(123)); // expected-error {{no matching conversion for functional-style cast from 'int' to 'S<void *>'}}
}
} // namespace test11
namespace test12 {
// Verify we do not crash.
int fun(int *foo = no_such_function()); // expected-error {{undeclared identifier}}
void crash1() { fun(); }
void crash2() { constexpr int s = fun(); }
} // namespace test12
namespace test13 {
enum Circular { // expected-note {{not complete until the closing '}'}}
Circular_A = Circular(1), // expected-error {{'Circular' is an incomplete type}}
};
// Enumerators can be evaluated (they evaluate as zero, but we don't care).
static_assert(Circular_A == 0 && Circular_A != 0, ""); // expected-error {{static assertion failed}} \
// expected-note {{evaluates to '0 != 0'}}
}
namespace test14 {
extern "C" void *memset(void *, int b, unsigned long) {
int * const c(undef()); // expected-error {{undeclared identifier}}
// Verify we do not crash on evaluating *c whose initializer is a NULL-type ParenListExpr!
memset(c, 0, *c); // crash1
b = __builtin_object_size(c, 0); // crash2
}
}
namespace test15 {
void f() {
struct {
void m(int (&)[undefined()]) {} // expected-error {{undeclared identifier}}
} S;
S.m(1); // no crash
}
}
namespace test16 {
// verify we do not crash on incomplete class type.
template<typename T, typename U> struct A; // expected-note 5{{template is declared here}}
A<int, int> foo() { // expected-error {{implicit instantiation of undefined template}}
if (1 == 1)
return A<int, int>{1}; // expected-error 2{{implicit instantiation of undefined template}}
return A<int, int>(1); // expected-error 2{{implicit instantiation of undefined template}}
}
}
|
