1 | // RUN: %clang_cc1 -std=c++11 -fexceptions -fcxx-exceptions -fsyntax-only -verify %s |
2 | |
3 | // Exception specification compatibility. |
4 | // We test function pointers, because functions have an extra rule in p4. |
5 | |
6 | // Same type is compatible |
7 | extern void (*r1)() throw(int); |
8 | extern void (*r1)() throw(int); |
9 | |
10 | // Typedefs don't matter. |
11 | typedef int INT; |
12 | extern void (*r2)() throw(int); |
13 | extern void (*r2)() throw(INT); |
14 | |
15 | // Order doesn't matter. |
16 | extern void (*r3)() throw(int, float); |
17 | extern void (*r3)() throw(float, int); |
18 | |
19 | // MS throw-any spec and no spec at all are compatible |
20 | extern void (*r4)(); |
21 | extern void (*r4)() throw(...); |
22 | |
23 | // throw(X) and no spec are not compatible |
24 | extern void (*r5)() throw(int); // expected-note {{previous declaration}} |
25 | extern void (*r5)(); // expected-error {{exception specification in declaration does not match}} |
26 | |
27 | // throw(int) and no spec are not compatible |
28 | extern void f5() throw(int); // expected-note {{previous declaration}} |
29 | extern void f5(); // expected-error {{missing exception specification}} |
30 | |
31 | // Different types are not compatible. |
32 | extern void (*r7)() throw(int); // expected-note {{previous declaration}} |
33 | extern void (*r7)() throw(float); // expected-error {{exception specification in declaration does not match}} |
34 | |
35 | // Top-level const doesn't matter. |
36 | extern void (*r8)() throw(int); |
37 | extern void (*r8)() throw(const int); |
38 | |
39 | // Multiple appearances don't matter. |
40 | extern void (*r9)() throw(int, int); |
41 | extern void (*r9)() throw(int, int); |
42 | |
43 | |
44 | // noexcept is compatible with itself |
45 | extern void (*r10)() noexcept; |
46 | extern void (*r10)() noexcept; |
47 | |
48 | // noexcept(true) is compatible with noexcept |
49 | extern void (*r11)() noexcept; |
50 | extern void (*r11)() noexcept(true); |
51 | |
52 | // noexcept(false) isn't |
53 | extern void (*r12)() noexcept; // expected-note {{previous declaration}} |
54 | extern void (*r12)() noexcept(false); // expected-error {{does not match}} |
55 | |
56 | // The form of the boolean expression doesn't matter. |
57 | extern void (*r13)() noexcept(1 < 2); |
58 | extern void (*r13)() noexcept(2 > 1); |
59 | |
60 | // noexcept(false) is incompatible with noexcept(true) |
61 | extern void (*r14)() noexcept(true); // expected-note {{previous declaration}} |
62 | extern void (*r14)() noexcept(false); // expected-error {{does not match}} |
63 | |
64 | // noexcept(false) is compatible with itself |
65 | extern void (*r15)() noexcept(false); |
66 | extern void (*r15)() noexcept(false); |
67 | |
68 | // noexcept(false) is compatible with MS throw(...) |
69 | extern void (*r16)() noexcept(false); |
70 | extern void (*r16)() throw(...); |
71 | |
72 | // noexcept(false) is *not* compatible with no spec |
73 | extern void (*r17)(); // expected-note {{previous declaration}} |
74 | extern void (*r17)() noexcept(false); // expected-error {{does not match}} |
75 | |
76 | // except for functions |
77 | void f17(); |
78 | void f17() noexcept(false); |
79 | |
80 | // noexcept(false) is compatible with dynamic specs that throw unless |
81 | // CWG 1073 resolution is accepted. Clang implements it. |
82 | //extern void (*r18)() throw(int); |
83 | //extern void (*r18)() noexcept(false); |
84 | |
85 | // noexcept(true) is compatible with dynamic specs that don't throw |
86 | extern void (*r19)() throw(); |
87 | extern void (*r19)() noexcept(true); |
88 | |
89 | // The other way round doesn't work. |
90 | extern void (*r20)() throw(); // expected-note {{previous declaration}} |
91 | extern void (*r20)() noexcept(false); // expected-error {{does not match}} |
92 | |
93 | extern void (*r21)() throw(int); // expected-note {{previous declaration}} |
94 | extern void (*r21)() noexcept(true); // expected-error {{does not match}} |
95 | |
96 | |
97 | // As a very special workaround, we allow operator new to match no spec |
98 | // with a throw(bad_alloc) spec, because C++0x makes an incompatible change |
99 | // here. |
100 | extern "C++" { namespace std { class bad_alloc {}; } } |
101 | typedef decltype(sizeof(int)) mysize_t; |
102 | void* operator new(mysize_t) throw(std::bad_alloc); |
103 | void* operator new(mysize_t); |
104 | void* operator new[](mysize_t); |
105 | void* operator new[](mysize_t) throw(std::bad_alloc); |
106 | |
107 | template<bool X> void equivalent() noexcept (X); |
108 | template<bool X> void equivalent() noexcept (X); |
109 | |
110 | template<bool X, bool Y> void not_equivalent() noexcept (X); // expected-note {{previous}} |
111 | template<bool X, bool Y> void not_equivalent() noexcept (Y); // expected-error {{does not match}} |
112 | |
113 | template<bool X> void missing() noexcept (X); // expected-note {{previous}} |
114 | // FIXME: The missing exception specification that we report here doesn't make |
115 | // sense in the context of this declaration. |
116 | template<bool P> void missing(); // expected-error {{missing exception specification 'noexcept(X)'}} |
117 | |