1 // RUN: %clang_cc1 -fsyntax-only %s -std=c++11 -verify
2 
3 // This is a test for an egregious hack in Clang that works around
4 // an issue with libstdc++-4.2's <tr1/hashtable> implementation.
5 // The code in question returns 'false' from a function with a pointer
6 // return type, which is ill-formed in C++11.
7 
8 #ifdef BE_THE_HEADER
9 
10 #pragma GCC system_header
11 namespace std {
12   namespace tr1 {
13     template<typename T> struct hashnode;
14     template<typename T> struct hashtable {
15       typedef hashnode<T> node;
find_nodestd::tr1::hashtable16       node *find_node() {
17         // This is ill-formed in C++11, per core issue 903, but we accept
18         // it anyway in a system header.
19         return false;
20       }
21     };
22   }
23 }
24 
25 #else
26 
27 #define BE_THE_HEADER
28 #include "libstdcxx_pointer_return_false_hack.cpp"
29 
30 auto *test1 = std::tr1::hashtable<int>().find_node();
31 
test2()32 void *test2() { return false; } // expected-error {{cannot initialize}}
33 
34 #endif
35