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1// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
2
3@interface X {}
4+ (X*) alloc;
5- (X*) init;
6- (int) getSize;
7- (void) setSize: (int) size;
8- (X*) getSelf;
9@end
10
11void f(X *noreturn) {
12  // An array size which is computed by a message send is OK.
13  int a[ [noreturn getSize] ];
14
15  // ... but is interpreted as an attribute where possible.
16  int b[ [noreturn] ]; // expected-error {{'noreturn' attribute only applies to functions}}
17
18  int c[ [noreturn getSize] + 1 ];
19
20  // An array size which is computed by a lambda is not OK.
21  int d[ [noreturn] { return 3; } () ]; // expected-error {{expected ']'}} expected-error {{'noreturn' attribute only applies to functions}}
22
23  // A message send which contains a message send is OK.
24  [ [ X alloc ] init ];
25  [ [ int(), noreturn getSelf ] getSize ]; // expected-warning {{unused}}
26
27  // A message send which contains a lambda is OK.
28  [ [noreturn] { return noreturn; } () setSize: 4 ];
29  [ [bitand] { return noreturn; } () setSize: 5 ];
30  [[[[] { return [ X alloc ]; } () init] getSelf] getSize];
31
32  // An attribute is OK.
33  [[]];
34  [[int(), noreturn]]; // expected-warning {{unknown attribute 'int' ignored}} \
35  // expected-error {{'noreturn' attribute cannot be applied to a statement}}
36  [[class, test(foo 'x' bar),,,]]; // expected-warning {{unknown attribute 'test' ignored}}\
37  // expected-warning {{unknown attribute 'class' ignored}}
38
39  [[bitand, noreturn]]; // expected-error {{'noreturn' attribute cannot be applied to a statement}} \
40  expected-warning {{unknown attribute 'bitand' ignored}}
41
42  // FIXME: Suppress vexing parse warning
43  [[gnu::noreturn]]int(e)(); // expected-warning {{function declaration}} expected-note {{replace parentheses with an initializer}}
44  int e2(); // expected-warning {{interpreted as a function declaration}} expected-note{{}}
45
46  // A function taking a noreturn function.
47  int(f)([[gnu::noreturn]] int ()); // expected-note {{here}}
48  f(e);
49  f(e2); // expected-error {{cannot initialize a parameter of type 'int (*)() __attribute__((noreturn))' with an lvalue of type 'int ()'}}
50
51  // Variables initialized by a message send.
52  int(g)([[noreturn getSelf] getSize]);
53  int(h)([[noreturn]{return noreturn;}() getSize]);
54
55  int i = g + h;
56}
57
58template<typename...Ts> void f(Ts ...x) {
59  [[test::foo(bar, baz)...]]; // expected-error {{attribute 'foo' cannot be used as an attribute pack}} \
60  // expected-warning {{unknown attribute 'foo' ignored}}
61
62  [[used(x)...]]; // expected-error {{attribute 'used' cannot be used as an attribute pack}} \
63  // expected-warning {{unknown attribute 'used' ignored}}
64
65  [[x...] { return [ X alloc ]; }() init];
66}
67