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 // For functions, we accept this with a warning.
28 extern void f5() throw(int); // expected-note {{previous declaration}}
29 extern void f5(); // expected-warning {{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