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