| 1 | // RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify |
| 2 | // RUN: %clang_cc1 -fsyntax-only -std=c++1y %s -verify -DCPP1Y |
| 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}} |
| 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_2(X x) { |
| 38 | return [x](int y) { |
| 39 | if (y > 0) |
| 40 | return X(); |
| 41 | else |
| 42 | return x; // ok even in c++11, per dr1048. |
| 43 | }(5); |
| 44 | } |
| 45 | |
| 46 | struct Incomplete; // expected-note{{forward declaration of 'Incomplete'}} |
| 47 | void test_result_type(int N) { |
| 48 | auto l1 = [] () -> Incomplete { }; // expected-error{{incomplete result type 'Incomplete' in lambda expression}} |
| 49 | |
| 50 | typedef int vla[N]; |
| 51 | auto l2 = [] () -> vla { }; // expected-error{{function cannot return array type 'vla' (aka 'int [N]')}} |
| 52 | } |
| 53 | |