1// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify
2// RUN: %clang_cc1 -fsyntax-only -std=c++1y %s -verify -DCPP1Y
3
4void missing_lambda_declarator() {
5  [](){}();
6}
7
8template<typename T> T get();
9
10void 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
26struct X { };
27
28X 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
37X 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
49struct Incomplete; // expected-note{{forward declaration of 'Incomplete'}}
50void 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