| 1 | // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s |
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| 2 | |
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| 3 | // PR5290 |
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| 4 | int const f0(); |
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| 5 | void f0_test() { |
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| 6 | decltype(0, f0()) i = 0; |
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| 7 | i = 0; |
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| 8 | } |
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| 9 | |
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| 10 | struct A { int a[1]; A() { } }; |
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| 11 | typedef A const AC; |
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| 12 | int &f1(int*); |
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| 13 | float &f2(int const*); |
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| 14 | |
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| 15 | void test_f2() { |
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| 16 | float &fr = f2(AC().a); |
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| 17 | } |
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| 18 | |
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| 19 | template <class T> |
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| 20 | struct Future { |
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| 21 | explicit Future(T v); |
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| 22 | |
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| 23 | template <class F> |
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| 24 | auto call(F&& fn) -> decltype(fn(T())) { |
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| 25 | return fn(T()); |
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| 26 | } |
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| 27 | |
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| 28 | template <class B, class F> |
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| 29 | auto then(F&& fn) -> decltype(call(fn)) |
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| 30 | { |
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| 31 | return fn(T()); |
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| 32 | } |
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| 33 | }; |
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| 34 | |
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| 35 | void rdar16527205() { |
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| 36 | Future<int> f1(42); |
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| 37 | f1.call([](int){ return Future<float>(0); }); |
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| 38 | } |
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| 39 | |
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| 40 | namespace pr10154 { |
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| 41 | class A{ |
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| 42 | A(decltype(nullptr) param); |
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| 43 | }; |
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| 44 | } |
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| 45 | |
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| 46 | template<typename T> struct S {}; |
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| 47 | template<typename T> auto f(T t) -> decltype(S<int>(t)) { |
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| 48 | using U = decltype(S<int>(t)); |
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| 49 | using U = S<int>; |
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| 50 | return S<int>(t); |
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| 51 | } |
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| 52 | |
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| 53 | struct B { |
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| 54 | B(decltype(undeclared)); // expected-error {{undeclared identifier}} |
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| 55 | }; |
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| 56 | struct C { |
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| 57 | C(decltype(undeclared; // expected-error {{undeclared identifier}} \ |
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| 58 | // expected-error {{expected ')'}} expected-note {{to match this '('}} |
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| 59 | }; |
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| 60 | |
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| 61 | namespace PR16529 { |
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| 62 | struct U {}; |
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| 63 | template <typename T> struct S { |
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| 64 | static decltype(T{}, U{}) &f(); |
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| 65 | }; |
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| 66 | U &r = S<int>::f(); |
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| 67 | } |
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| 68 | |
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| 69 | namespace PR18876 { |
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| 70 | struct A { ~A() = delete; }; // expected-note +{{here}} |
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| 71 | A f(); |
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| 72 | decltype(f()) *a; // ok, function call |
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| 73 | decltype(A()) *b; // expected-error {{attempt to use a deleted function}} |
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| 74 | decltype(0, f()) *c; // ok, function call on RHS of comma |
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| 75 | decltype(0, A()) *d; // expected-error {{attempt to use a deleted function}} |
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| 76 | decltype(f(), 0) *e; // expected-error {{attempt to use a deleted function}} |
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| 77 | } |
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| 78 | |
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| 79 | namespace D5789 { |
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| 80 | struct P1 { char x[6]; } g1 = { "foo" }; |
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| 81 | struct LP1 { struct P1 p1; }; |
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| 82 | |
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| 83 | // expected-warning@+3 {{subobject initialization overrides}} |
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| 84 | // expected-note@+2 {{previous initialization}} |
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| 85 | // expected-note@+1 {{previous definition}} |
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| 86 | template<class T> void foo(decltype(T(LP1{ .p1 = g1, .p1.x[1] = 'x' }))) {} |
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| 87 | |
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| 88 | // expected-warning@+3 {{subobject initialization overrides}} |
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| 89 | // expected-note@+2 {{previous initialization}} |
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| 90 | template<class T> |
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| 91 | void foo(decltype(T(LP1{ .p1 = g1, .p1.x[1] = 'r' }))) {} // okay |
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| 92 | |
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| 93 | // expected-warning@+3 {{subobject initialization overrides}} |
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| 94 | // expected-note@+2 {{previous initialization}} |
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| 95 | template<class T> |
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| 96 | void foo(decltype(T(LP1{ .p1 = { "foo" }, .p1.x[1] = 'x'}))) {} // okay |
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| 97 | |
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| 98 | // expected-warning@+3 {{subobject initialization overrides}} |
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| 99 | // expected-note@+2 {{previous initialization}} |
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| 100 | // expected-error@+1 {{redefinition of 'foo'}} |
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| 101 | template<class T> void foo(decltype(T(LP1{ .p1 = g1, .p1.x[1] = 'x' }))) {} |
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| 102 | } |
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| 103 | |
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| 104 | template<typename> |
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| 105 | class conditional { |
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| 106 | }; |
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| 107 | |
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| 108 | void foo(conditional<decltype((1),int>) { // expected-note 2 {{to match this '('}} expected-error {{expected ')'}} |
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| 109 | } // expected-error {{expected function body after function declarator}} expected-error 2 {{expected '>'}} expected-error {{expected ')'}} |
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| 110 | |
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