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