clang/test/CXX/special/class.init/class.base.init/p8-0x.cpp

   1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
   2
   3 int n;
   4 struct S {
   5   int &a; // expected-note 2{{here}}
   6   int &b = n;
   7
   8   union {
   9     const int k = 42;
  10   };
  11
  12   S() {} // expected-error {{constructor for 'S' must explicitly initialize the reference member 'a'}}
  13   S(int) : a(n) {} // ok
  14   S(char) : b(n) {} // expected-error {{constructor for 'S' must explicitly initialize the reference member 'a'}}
  15   S(double) : a(n), b(n) {} // ok
  16 } s(0);
  17
  18 union U {
  19   int a = 0; // expected-note {{previous initialization}}
  20   char b = 'x'; // expected-error {{initializing multiple members of union}}
  21
  22   U() {}
  23   U(int) : a(1) {}
  24   U(char) : b('y') {}
  25   U(double) : a(1), // expected-note{{previous initialization is here}}
  26               b('y') {} // expected-error{{initializing multiple members of union}}
  27 };
  28
  29 // PR10954: variant members do not acquire an implicit initializer.
  30 namespace VariantMembers {
  31   struct NoDefaultCtor {
  32     NoDefaultCtor(int);
  33   };
  34   union V {
  35     NoDefaultCtor ndc;
  36     int n;
  37
  38     V() {}
  39     V(int n) : n(n) {}
  40     V(int n, bool) : ndc(n) {}
  41   };
  42   struct K {
  43     union {
  44       NoDefaultCtor ndc;
  45       int n;
  46     };
  47     K() {}
  48     K(int n) : n(n) {}
  49     K(int n, bool) : ndc(n) {}
  50   };
  51   struct Nested {
  52     Nested() {}
  53     union {
  54       struct {
  55         NoDefaultCtor ndc;
  56       };
  57     };
  58   };
  59 }