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1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wno-unused-value %s -verify
2 
3 // prvalue
prvalue()4 void prvalue() {
5   auto&& x = []()->void { };
6   auto& y = []()->void { }; // expected-error{{cannot bind to a temporary of type}}
7 }
8 
9 namespace std {
10   class type_info;
11 }
12 
13 struct P {
14   virtual ~P();
15 };
16 
unevaluated_operand(P & p,int i)17 void unevaluated_operand(P &p, int i) {
18   int i2 = sizeof([] ()->int { return 0; }()); // expected-error{{lambda expression in an unevaluated operand}}
19   const std::type_info &ti1 = typeid([&]() -> P& { return p; }());
20   const std::type_info &ti2 = typeid([&]() -> int { return i; }());  // expected-error{{lambda expression in an unevaluated operand}}
21 }
22 
23 template<typename T>
24 struct Boom {
BoomBoom25   Boom(const Boom&) {
26     T* x = 1; // expected-error{{cannot initialize a variable of type 'int *' with an rvalue of type 'int'}} \
27     // expected-error{{cannot initialize a variable of type 'double *' with an rvalue of type 'int'}}
28   }
29   void tickle() const;
30 };
31 
odr_used(P & p,Boom<int> boom_int,Boom<float> boom_float,Boom<double> boom_double)32 void odr_used(P &p, Boom<int> boom_int, Boom<float> boom_float,
33               Boom<double> boom_double) {
34   const std::type_info &ti1
35     = typeid([=,&p]() -> P& { boom_int.tickle(); return p; }()); // expected-note{{in instantiation of member function 'Boom<int>::Boom' requested here}}
36   // This does not cause the instantiation of the Boom copy constructor,
37   // because the copy-initialization of the capture of boom_float occurs in an
38   // unevaluated operand.
39   const std::type_info &ti2
40     = typeid([=]() -> int { boom_float.tickle(); return 0; }()); // expected-error{{lambda expression in an unevaluated operand}}
41 
42   auto foo = [=]() -> int { boom_double.tickle(); return 0; }; // expected-note{{in instantiation of member function 'Boom<double>::Boom' requested here}}
43 }
44