p2.cpp
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// RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wno-unused-value %s -verify
// prvalue
void prvalue() {
auto&& x = []()->void { };
auto& y = []()->void { }; // expected-error{{cannot bind to a temporary of type}}
}
namespace std {
class type_info;
}
struct P {
virtual ~P();
};
void unevaluated_operand(P &p, int i) {
int i2 = sizeof([] ()->int { return 0; }()); // expected-error{{lambda expression in an unevaluated operand}}
const std::type_info &ti1 = typeid([&]() -> P& { return p; }());
const std::type_info &ti2 = typeid([&]() -> int { return i; }()); // expected-error{{lambda expression in an unevaluated operand}}
}
template<typename T>
struct Boom {
Boom(const Boom&) {
T* x = 1; // expected-error{{cannot initialize a variable of type 'int *' with an rvalue of type 'int'}} \
// expected-error{{cannot initialize a variable of type 'double *' with an rvalue of type 'int'}}
}
void tickle() const;
};
void odr_used(P &p, Boom<int> boom_int, Boom<float> boom_float,
Boom<double> boom_double) {
const std::type_info &ti1
= typeid([=,&p]() -> P& { boom_int.tickle(); return p; }()); // expected-note{{in instantiation of member function 'Boom<int>::Boom' requested here}}
// This does not cause the instantiation of the Boom copy constructor,
// because the copy-initialization of the capture of boom_float occurs in an
// unevaluated operand.
const std::type_info &ti2
= typeid([=]() -> int { boom_float.tickle(); return 0; }()); // expected-error{{lambda expression in an unevaluated operand}}
auto foo = [=]() -> int { boom_double.tickle(); return 0; }; // expected-note{{in instantiation of member function 'Boom<double>::Boom' requested here}}
}