1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
7 - (void) setSize: (int) size;
12 // An array size which is computed by a message send is OK.
13 int a[ [noreturn getSize] ]; // expected-warning {{variable length arrays in C++ are a Clang extension}}
15 // ... but is interpreted as an attribute where possible.
16 int b[ [noreturn] ]; // expected-error {{'noreturn' attribute only applies to functions}}
18 int c[ [noreturn getSize] + 1 ]; // expected-warning {{variable length arrays in C++ are a Clang extension}}
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}}
23 // A message send which contains a message send is OK.
25 [ [ int(), noreturn getSelf ] getSize ]; // expected-warning {{left operand of comma operator has no effect}}
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];
32 // An attribute is OK.
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}}
39 [[bitand, noreturn]]; // expected-error {{'noreturn' attribute cannot be applied to a statement}} \
40 expected-warning {{unknown attribute 'bitand' ignored}}
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{{}}
46 // A function taking a noreturn function.
47 int(f)([[gnu::noreturn]] int ()); // expected-note {{here}}
49 f(e2); // expected-error {{cannot initialize a parameter of type 'int (*)() __attribute__((noreturn))' with an lvalue of type 'int ()'}}
51 // Variables initialized by a message send.
52 int(g)([[noreturn getSelf] getSize]);
53 int(h)([[noreturn]{return noreturn;}() getSize]);
58 template<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}}
62 [[used(x)...]]; // expected-error {{attribute 'used' cannot be used as an attribute pack}} \
63 // expected-warning {{unknown attribute 'used' ignored}}
65 [[x...] { return [ X alloc ]; }() init];