| 1 | // RUN: %clang_cc1 -std=c++11 -verify %s |
|---|
| 2 | |
|---|
| 3 | namespace std_example { |
|---|
| 4 | struct A { A(int); }; |
|---|
| 5 | struct B : A { using A::A; }; |
|---|
| 6 | |
|---|
| 7 | struct C1 : B { using B::B; }; |
|---|
| 8 | struct C2 : B { using B::B; }; |
|---|
| 9 | |
|---|
| 10 | struct D1 : C1, C2 { |
|---|
| 11 | using C1::C1; // expected-note {{inherited from base class 'C1' here}} |
|---|
| 12 | using C2::C2; // expected-note {{inherited from base class 'C2' here}} |
|---|
| 13 | }; |
|---|
| 14 | |
|---|
| 15 | struct V1 : virtual B { using B::B; }; |
|---|
| 16 | struct V2 : virtual B { using B::B; }; |
|---|
| 17 | |
|---|
| 18 | struct D2 : V1, V2 { |
|---|
| 19 | using V1::V1; |
|---|
| 20 | using V2::V2; |
|---|
| 21 | }; |
|---|
| 22 | |
|---|
| 23 | D1 d1(0); // expected-error {{constructor of 'A' inherited from multiple base class subobjects}} |
|---|
| 24 | D2 d2(0); // OK: initializes virtual B base class, which initializes the A base class |
|---|
| 25 | // then initializes the V1 and V2 base classes as if by a defaulted default constructor |
|---|
| 26 | |
|---|
| 27 | struct M { M(); M(int); }; |
|---|
| 28 | struct N : M { using M::M; }; |
|---|
| 29 | struct O : M {}; |
|---|
| 30 | struct P : N, O { using N::N; using O::O; }; |
|---|
| 31 | P p(0); // OK: use M(0) to initialize N's base class, |
|---|
| 32 | // use M() to initialize O's base class |
|---|
| 33 | } |
|---|
| 34 | |
|---|