1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify 2 // RUN: %clang_cc1 -fsyntax-only -std=c++1y %s -verify 3 4 void missing_lambda_declarator() { 5 [](){}(); 6 } 7 8 template<typename T> T get(); 9 10 void infer_void_return_type(int i) { 11 if (i > 17) 12 return []() { }(); 13 14 if (i > 11) 15 return []() { return; }(); 16 17 return [](int x) { 18 switch (x) { 19 case 0: return get<void>(); 20 case 1: return; 21 case 2: return { 1, 2.0 }; // expected-error{{cannot deduce lambda return type from initializer list}} 22 } 23 }(7); 24 } 25 26 struct X { }; 27 28 X infer_X_return_type(X x) { 29 return [&x](int y) { 30 if (y > 0) 31 return X(); 32 else 33 return x; 34 }(5); 35 } 36 37 X infer_X_return_type_fail(X x) { 38 return [x](int y) { 39 if (y > 0) 40 return X(); 41 else 42 return x; 43 #if __cplusplus <= 201103L 44 // expected-error@-2 {{return type 'const X' must match previous return type 'X' when lambda expression has unspecified explicit return type}} 45 #endif 46 }(5); 47 } 48 49 struct Incomplete; // expected-note{{forward declaration of 'Incomplete'}} 50 void test_result_type(int N) { 51 auto l1 = [] () -> Incomplete { }; // expected-error{{incomplete result type 'Incomplete' in lambda expression}} 52 53 typedef int vla[N]; 54 auto l2 = [] () -> vla { }; // expected-error{{function cannot return array type 'vla' (aka 'int [N]')}} 55 } 56
