xref: /minix3/external/bsd/llvm/dist/clang/test/CodeGenCXX/weak-external.cpp (revision 0a6a1f1d05b60e214de2f05a7310ddd1f0e590e7)
1*0a6a1f1dSLionel Sambuc // RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple %itanium_abi_triple %s -S -emit-llvm -o - | FileCheck %s
2f4a2713aSLionel Sambuc // PR4262
3f4a2713aSLionel Sambuc 
4f4a2713aSLionel Sambuc // CHECK-NOT: _ZNSs12_S_constructIPKcEEPcT_S3_RKSaIcESt20forward_iterator_tag
5f4a2713aSLionel Sambuc 
6f4a2713aSLionel Sambuc // The "basic_string" extern template instantiation declaration is supposed to
7f4a2713aSLionel Sambuc // suppress the implicit instantiation of non-inline member functions. Make sure
8f4a2713aSLionel Sambuc // that we suppress the implicit instantiation of non-inline member functions
9f4a2713aSLionel Sambuc // defined out-of-line. That we aren't instantiating the basic_string
10f4a2713aSLionel Sambuc // constructor when we shouldn't be. Such an instantiation forces the implicit
11f4a2713aSLionel Sambuc // instantiation of _S_construct<const char*>. Since _S_construct is a member
12f4a2713aSLionel Sambuc // template, it's instantiation is *not* suppressed (despite being in
13f4a2713aSLionel Sambuc // basic_string<char>), so we would emit it as a weak definition.
14f4a2713aSLionel Sambuc 
15f4a2713aSLionel Sambuc #define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default")))
16f4a2713aSLionel Sambuc #define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__visibility__("hidden"), __always_inline__))
17f4a2713aSLionel Sambuc #define _LIBCPP_VISIBLE __attribute__ ((__visibility__("default")))
18f4a2713aSLionel Sambuc #if (__has_feature(cxx_noexcept))
19f4a2713aSLionel Sambuc #  define _NOEXCEPT noexcept
20f4a2713aSLionel Sambuc #  define _NOEXCEPT_(x) noexcept(x)
21f4a2713aSLionel Sambuc #else
22f4a2713aSLionel Sambuc #  define _NOEXCEPT throw()
23f4a2713aSLionel Sambuc #  define _NOEXCEPT_(x)
24f4a2713aSLionel Sambuc #endif
25f4a2713aSLionel Sambuc 
26f4a2713aSLionel Sambuc namespace std  // purposefully not using versioning namespace
27f4a2713aSLionel Sambuc {
28f4a2713aSLionel Sambuc 
29f4a2713aSLionel Sambuc template<class charT> struct char_traits;
30f4a2713aSLionel Sambuc template<class T>     class allocator;
31f4a2713aSLionel Sambuc template <class _CharT,
32f4a2713aSLionel Sambuc           class _Traits = char_traits<_CharT>,
33f4a2713aSLionel Sambuc           class _Allocator = allocator<_CharT> >
34f4a2713aSLionel Sambuc     class _LIBCPP_VISIBLE basic_string;
35f4a2713aSLionel Sambuc typedef basic_string<char, char_traits<char>, allocator<char> > string;
36f4a2713aSLionel Sambuc 
37f4a2713aSLionel Sambuc class _LIBCPP_EXCEPTION_ABI exception
38f4a2713aSLionel Sambuc {
39f4a2713aSLionel Sambuc public:
exception()40f4a2713aSLionel Sambuc     _LIBCPP_INLINE_VISIBILITY exception() _NOEXCEPT {}
41f4a2713aSLionel Sambuc     virtual ~exception() _NOEXCEPT;
42f4a2713aSLionel Sambuc     virtual const char* what() const _NOEXCEPT;
43f4a2713aSLionel Sambuc };
44f4a2713aSLionel Sambuc 
45f4a2713aSLionel Sambuc class _LIBCPP_EXCEPTION_ABI runtime_error
46f4a2713aSLionel Sambuc     : public exception
47f4a2713aSLionel Sambuc {
48f4a2713aSLionel Sambuc private:
49f4a2713aSLionel Sambuc     void* __imp_;
50f4a2713aSLionel Sambuc public:
51f4a2713aSLionel Sambuc     explicit runtime_error(const string&);
52f4a2713aSLionel Sambuc     explicit runtime_error(const char*);
53f4a2713aSLionel Sambuc 
54f4a2713aSLionel Sambuc     runtime_error(const runtime_error&) _NOEXCEPT;
55f4a2713aSLionel Sambuc     runtime_error& operator=(const runtime_error&) _NOEXCEPT;
56f4a2713aSLionel Sambuc 
57f4a2713aSLionel Sambuc     virtual ~runtime_error() _NOEXCEPT;
58f4a2713aSLionel Sambuc 
59f4a2713aSLionel Sambuc     virtual const char* what() const _NOEXCEPT;
60f4a2713aSLionel Sambuc };
61f4a2713aSLionel Sambuc 
62f4a2713aSLionel Sambuc }
63f4a2713aSLionel Sambuc 
dummysymbol()64f4a2713aSLionel Sambuc void dummysymbol() {
65f4a2713aSLionel Sambuc   throw(std::runtime_error("string"));
66f4a2713aSLionel Sambuc }
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