clang/test/CXX/expr/expr.prim/expr.prim.lambda/p2-generic-lambda-1y.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++1y -DCXX1Y
   2
   3 // prvalue
   4 void prvalue() {
   5   auto&& x = [](auto a)->void { };
   6   auto& y = [](auto *a)->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
  17 void unevaluated_operand(P &p, int i) { //expected-note{{declared here}}
  18   // FIXME: this should only emit one error.
  19   int i2 = sizeof([](auto a, auto b)->void{}(3, '4')); // expected-error{{lambda expression in an unevaluated operand}} \
  20                                                        // expected-error{{invalid application of 'sizeof'}}
  21   const std::type_info &ti1 = typeid([](auto &a) -> P& { static P p; return p; }(i)); // expected-warning {{expression with side effects will be evaluated despite being used as an operand to 'typeid'}}
  22   const std::type_info &ti2 = typeid([](auto) -> int { return i; }(i));               // expected-error{{lambda expression in an unevaluated operand}}\
  23                                                                          // expected-error{{cannot be implicitly captured}}\
  24                                                                          // expected-note{{begins here}}\
  25                                                                          // expected-note 2 {{capture 'i' by}}\
  26                                                                          // expected-note 2 {{default capture by}}
  27 }