1 // RUN: %clang_cc1 -std=c++11 -verify %s 2 3 template<int> struct X {}; 4 5 // A[n inheriting] constructor [...] has the same access as the corresponding 6 // constructor [in the base class]. 7 struct A { 8 public: 9 A(X<0>) {} 10 protected: 11 A(X<1>) {} 12 private: 13 A(X<2>) {} // expected-note {{declared private here}} 14 friend class FA; 15 }; 16 17 struct B : A { 18 using A::A; // expected-error {{private constructor}} expected-note {{implicitly declared protected here}} 19 friend class FB; 20 }; 21 22 B b0{X<0>{}}; 23 B b1{X<1>{}}; // expected-error {{calling a protected constructor}} 24 B b2{X<2>{}}; // expected-note {{first required here}} 25 26 struct C : B { 27 C(X<0> x) : B(x) {} 28 C(X<1> x) : B(x) {} 29 }; 30 31 struct FB { 32 B b0{X<0>{}}; 33 B b1{X<1>{}}; 34 }; 35 36 struct FA : A { 37 using A::A; // expected-note 2{{here}} 38 }; 39 FA fa0{X<0>{}}; 40 FA fa1{X<1>{}}; // expected-error {{calling a protected constructor}} 41 FA fa2{X<2>{}}; // expected-error {{calling a private constructor}} 42 43 44 // It is deleted if the corresponding constructor [...] is deleted. 45 struct G { 46 G(int) = delete; // expected-note {{'G' has been explicitly marked deleted here}} 47 template<typename T> G(T*) = delete; // expected-note {{'G<const char>' has been explicitly marked deleted here}} 48 }; 49 struct H : G { 50 using G::G; // expected-note 2{{deleted constructor was inherited here}} 51 }; 52 H h1(5); // expected-error {{call to deleted constructor of 'H'}} 53 H h2("foo"); // expected-error {{call to deleted constructor of 'H'}} 54 55 56 // Core defect: It is also deleted if multiple base constructors generate the 57 // same signature. 58 namespace DRnnnn { 59 struct A { 60 constexpr A(int, float = 0) {} 61 explicit A(int, int = 0) {} // expected-note {{constructor cannot be inherited}} 62 63 A(int, int, int = 0) = delete; 64 }; 65 struct B : A { 66 using A::A; // expected-note {{here}} 67 }; 68 69 constexpr B b0(0, 0.0f); // ok, constexpr 70 B b1(0, 1); // expected-error {{call to deleted constructor of 'DRnnnn::B'}} 71 } 72
