John McCall | 15e310a | 2011-02-19 02:53:41 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
| 2 | |
| 3 | // Make sure we don't produce invalid IR. |
| 4 | // RUN: %clang_cc1 -emit-llvm-only %s |
| 5 | |
| 6 | namespace test1 { |
| 7 | static void foo(); // expected-warning {{function 'test1::foo' has internal linkage but is not defined}} |
| 8 | template <class T> static void bar(); // expected-warning {{function 'test1::bar<int>' has internal linkage but is not defined}} |
| 9 | |
| 10 | void test() { |
| 11 | foo(); // expected-note {{used here}} |
| 12 | bar<int>(); // expected-note {{used here}} |
| 13 | } |
| 14 | } |
| 15 | |
| 16 | namespace test2 { |
| 17 | namespace { |
| 18 | void foo(); // expected-warning {{function 'test2::<anonymous namespace>::foo' has internal linkage but is not defined}} |
| 19 | extern int var; // expected-warning {{variable 'test2::<anonymous namespace>::var' has internal linkage but is not defined}} |
| 20 | template <class T> void bar(); // expected-warning {{function 'test2::<anonymous namespace>::bar<int>' has internal linkage but is not defined}} |
| 21 | } |
| 22 | void test() { |
| 23 | foo(); // expected-note {{used here}} |
| 24 | var = 0; // expected-note {{used here}} |
| 25 | bar<int>(); // expected-note {{used here}} |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | namespace test3 { |
| 30 | namespace { |
| 31 | void foo(); |
| 32 | extern int var; |
| 33 | template <class T> void bar(); |
| 34 | } |
| 35 | |
| 36 | void test() { |
| 37 | foo(); |
| 38 | var = 0; |
| 39 | bar<int>(); |
| 40 | } |
| 41 | |
| 42 | namespace { |
| 43 | void foo() {} |
| 44 | int var = 0; |
| 45 | template <class T> void bar() {} |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | namespace test4 { |
| 50 | namespace { |
| 51 | struct A { |
| 52 | A(); // expected-warning {{function 'test4::<anonymous namespace>::A::A' has internal linkage but is not defined}} |
| 53 | ~A();// expected-warning {{function 'test4::<anonymous namespace>::A::~A' has internal linkage but is not defined}} |
| 54 | virtual void foo(); // expected-warning {{function 'test4::<anonymous namespace>::A::foo' has internal linkage but is not defined}} |
| 55 | virtual void bar() = 0; |
| 56 | virtual void baz(); // expected-warning {{function 'test4::<anonymous namespace>::A::baz' has internal linkage but is not defined}} |
| 57 | }; |
| 58 | } |
| 59 | |
| 60 | void test(A &a) { |
| 61 | a.foo(); // expected-note {{used here}} |
| 62 | a.bar(); |
| 63 | a.baz(); // expected-note {{used here}} |
| 64 | } |
| 65 | |
| 66 | struct Test : A { |
| 67 | Test() {} // expected-note 2 {{used here}} |
| 68 | }; |
| 69 | } |
| 70 | |
| 71 | // rdar://problem/9014651 |
| 72 | namespace test5 { |
| 73 | namespace { |
| 74 | struct A {}; |
| 75 | } |
| 76 | |
| 77 | template <class N> struct B { |
| 78 | static int var; // expected-warning {{variable 'test5::B<test5::<anonymous>::A>::var' has internal linkage but is not defined}} |
| 79 | static void foo(); // expected-warning {{function 'test5::B<test5::<anonymous>::A>::foo' has internal linkage but is not defined}} |
| 80 | }; |
| 81 | |
| 82 | void test() { |
| 83 | B<A>::var = 0; // expected-note {{used here}} |
| 84 | B<A>::foo(); // expected-note {{used here}} |
| 85 | } |
| 86 | } |
John McCall | 77efc68 | 2011-02-21 19:25:48 +0000 | [diff] [blame] | 87 | |
| 88 | namespace test6 { |
| 89 | template <class T> struct A { |
| 90 | static const int zero = 0; |
| 91 | static const int one = 1; |
| 92 | static const int two = 2; |
| 93 | |
| 94 | int value; |
| 95 | |
| 96 | A() : value(zero) { |
| 97 | value = one; |
| 98 | } |
| 99 | }; |
| 100 | |
| 101 | namespace { struct Internal; } |
| 102 | |
| 103 | void test() { |
| 104 | A<Internal> a; |
| 105 | a.value = A<Internal>::two; |
| 106 | } |
| 107 | } |
Chandler Carruth | 3002823 | 2011-02-25 08:52:25 +0000 | [diff] [blame] | 108 | |
| 109 | // We support (as an extension) private, undefined copy constructors when |
| 110 | // a temporary is bound to a reference even in C++98. Similarly, we shouldn't |
| 111 | // warn about this copy constructor being used without a definition. |
| 112 | namespace PR9323 { |
| 113 | namespace { |
| 114 | struct Uncopyable { |
| 115 | Uncopyable() {} |
| 116 | private: |
| 117 | Uncopyable(const Uncopyable&); // expected-note {{declared private here}} |
| 118 | }; |
| 119 | } |
| 120 | void f(const Uncopyable&) {} |
| 121 | void test() { |
| 122 | f(Uncopyable()); // expected-warning {{C++98 requires an accessible copy constructor}} |
| 123 | }; |
| 124 | } |
Eli Friedman | d2cce13 | 2012-02-02 23:15:15 +0000 | [diff] [blame] | 125 | |
| 126 | |
| 127 | namespace std { class type_info; }; |
| 128 | namespace cxx11_odr_rules { |
| 129 | // Note: the way this test is written isn't really ideal, but there really |
| 130 | // isn't any other way to check that the odr-used logic for constants |
| 131 | // is working without working implicit capture in lambda-expressions. |
| 132 | // (The more accurate used-but-not-defined warning is the only other visible |
| 133 | // effect of accurate odr-used computation.) |
| 134 | // |
| 135 | // Note that the warning in question can trigger in cases some people would |
| 136 | // consider false positives; hopefully that happens rarely in practice. |
Eli Friedman | 0cc5d40 | 2012-02-04 00:54:05 +0000 | [diff] [blame] | 137 | // |
| 138 | // FIXME: Suppressing this test while I figure out how to fix a bug in the |
| 139 | // odr-use marking code. |
Eli Friedman | d2cce13 | 2012-02-02 23:15:15 +0000 | [diff] [blame] | 140 | |
| 141 | namespace { |
| 142 | struct A { |
| 143 | static const int unused = 10; |
Eli Friedman | 0cc5d40 | 2012-02-04 00:54:05 +0000 | [diff] [blame] | 144 | static const int used1 = 20; // xpected-warning {{internal linkage}} |
| 145 | static const int used2 = 20; // xpected-warning {{internal linkage}} |
Eli Friedman | d2cce13 | 2012-02-02 23:15:15 +0000 | [diff] [blame] | 146 | virtual ~A() {} |
| 147 | }; |
| 148 | } |
| 149 | |
| 150 | void a(int,int); |
| 151 | A& p(const int&) { static A a; return a; } |
| 152 | |
| 153 | // Check handling of default arguments |
| 154 | void b(int = A::unused); |
| 155 | |
| 156 | void tests() { |
| 157 | // Basic test |
| 158 | a(A::unused, A::unused); |
| 159 | |
| 160 | // Check that nesting an unevaluated or constant-evaluated context does |
| 161 | // the right thing. |
| 162 | a(A::unused, sizeof(int[10])); |
| 163 | |
| 164 | // Check that the checks work with unevaluated contexts |
| 165 | (void)sizeof(p(A::used1)); |
Eli Friedman | 0cc5d40 | 2012-02-04 00:54:05 +0000 | [diff] [blame] | 166 | (void)typeid(p(A::used1)); // xpected-note {{used here}} |
Eli Friedman | d2cce13 | 2012-02-02 23:15:15 +0000 | [diff] [blame] | 167 | |
| 168 | // Misc other testing |
Eli Friedman | 0cc5d40 | 2012-02-04 00:54:05 +0000 | [diff] [blame] | 169 | a(A::unused, 1 ? A::used2 : A::used2); // xpected-note {{used here}} |
Eli Friedman | d2cce13 | 2012-02-02 23:15:15 +0000 | [diff] [blame] | 170 | b(); |
| 171 | } |
| 172 | } |
Eli Friedman | 59a839c | 2012-02-08 03:07:05 +0000 | [diff] [blame] | 173 | |
| 174 | |
| 175 | namespace OverloadUse { |
| 176 | namespace { |
| 177 | void f(); |
| 178 | void f(int); // expected-warning {{function 'OverloadUse::<anonymous namespace>::f' has internal linkage but is not defined}} |
| 179 | } |
| 180 | template<void x()> void t(int*) { x(); } |
| 181 | template<void x(int)> void t(long*) { x(10); } // expected-note {{used here}} |
| 182 | void g() { long a; t<f>(&a); } |
| 183 | } |
Rafael Espindola | 9f40954 | 2012-12-29 23:43:00 +0000 | [diff] [blame] | 184 | |
| 185 | namespace test7 { |
| 186 | typedef struct { |
| 187 | void bar(); |
| 188 | void foo() { |
| 189 | bar(); |
| 190 | } |
| 191 | } A; |
| 192 | } |
| 193 | |
| 194 | namespace test8 { |
| 195 | typedef struct { |
| 196 | void bar(); // expected-warning {{function 'test8::<anonymous struct>::bar' has internal linkage but is not defined}} |
| 197 | void foo() { |
| 198 | bar(); // expected-note {{used here}} |
| 199 | } |
| 200 | } *A; |
| 201 | } |
Nick Lewycky | 4ceaf33 | 2013-01-31 01:34:31 +0000 | [diff] [blame^] | 202 | |
| 203 | namespace test9 { |
| 204 | namespace { |
| 205 | struct X { |
| 206 | virtual void notused() = 0; |
| 207 | virtual void used() = 0; // expected-warning {{function 'test9::<anonymous namespace>::X::used' has internal linkage but is not defined}} |
| 208 | }; |
| 209 | } |
| 210 | void test(X &x) { |
| 211 | x.notused(); |
| 212 | x.X::used(); // expected-note {{used here}} |
| 213 | } |
| 214 | } |