clang/test/CXX/except/except.spec/p3.cpp

   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)'}}