clang/test/SemaCXX/class-base-member-init.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s
   2
   3 class S {
   4 public:
   5   S ();
   6 };
   7
   8 struct D : S {
   9   D() :
  10     b1(0), // expected-note {{previous initialization is here}}
  11     b2(1),
  12     b1(0), // expected-error {{multiple initializations given for non-static member 'b1'}}
  13     S(),   // expected-note {{previous initialization is here}}
  14     S()    // expected-error {{multiple initializations given for base 'S'}}
  15     {}
  16   int b1;
  17   int b2;
  18 };
  19
  20 struct A {
  21   struct {
  22     int a;
  23     int b;
  24   };
  25   A();
  26 };
  27
  28 A::A() : a(10), b(20) { }
  29
  30 namespace Test1 {
  31   template<typename T> struct A {};
  32   template<typename T> struct B : A<T> {
  33
  34     B() : A<T>(), // expected-note {{previous initialization is here}}
  35       A<T>() { } // expected-error {{multiple initializations given for base 'A<T>'}}
  36   };
  37 }
  38
  39 namespace Test2 {
  40   template<typename T> struct A : T {
  41     A() : T(), // expected-note {{previous initialization is here}}
  42       T() { } // expected-error {{multiple initializations given for base 'T'}}
  43   };
  44 }
  45
  46 namespace Test3 {
  47   template<typename T> struct A {
  48     T t;
  49
  50     A() : t(1), // expected-note {{previous initialization is here}}
  51       t(2) { } // expected-error {{multiple initializations given for non-static member 't'}}
  52   };
  53 }
  54
  55 namespace test4 {
  56   class A {
  57     union {
  58       struct {
  59         int a;
  60         int b;
  61       };
  62
  63       int c;
  64
  65       union {
  66         int d;
  67         int e;
  68       };
  69     };
  70
  71     A(char _) : a(0), b(0) {}
  72     A(short _) : a(0), c(0) {} // expected-error {{initializing multiple members of union}} expected-note {{previous initialization is here}}
  73     A(int _) : d(0), e(0) {} // expected-error {{initializing multiple members of union}} expected-note {{previous initialization is here}}
  74     A(long _) : a(0), d(0) {} // expected-error {{initializing multiple members of union}} expected-note {{previous initialization is here}}
  75   };
  76 }
  77
  78 namespace test5 {
  79   struct Base {
  80     Base(int);
  81   };
  82   struct A : Base {
  83     A() : decltype(Base(1))(3) {
  84     }
  85     A(int) : Base(3), // expected-note {{previous initialization is here}}
  86              decltype(Base(1))(2), // expected-error {{multiple initializations given for base 'decltype(Base(1))' (aka 'test5::Base')}}
  87              decltype(int())() { // expected-error {{constructor initializer 'decltype(int())' (aka 'int') does not name a class}}
  88     }
  89     A(float) : decltype(A())(3) {
  90     }
  91   };
  92 }
  93
  94 namespace rdar13185264 {
  95   class X {
  96     X() : a(), // expected-note{{previous initialization is here}}
  97           a()  { } // expected-error{{multiple initializations given for non-static member 'a'}}
  98     union { void *a; };
  99   };
 100 }
 101
 102 namespace PR16596 {
 103   class A { public: virtual ~A(); };
 104   typedef const A Foo;
 105   void Apply(Foo processor);
 106   struct Bar : public Foo {};
 107   void Fetch() {
 108     Apply(Bar());
 109   }
 110 }