87 lines
1.3 KiB
C
87 lines
1.3 KiB
C
// { dg-do run }
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// Copyright (C) 1999 Free Software Foundation, Inc.
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// Contributed by Nathan Sidwell 20 May 1999 <nathan@acm.org>
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// Although anon unions cannot have user defined member functions
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// [class.union/2]. They should have implicitly defined copy ctors and
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// and the like [class.copy/4]. Make sure we generate one of the correct
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// signature and that it works ok.
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extern "C" void abort();
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struct A
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{
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union
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{
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int a;
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};
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};
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union B
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{
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int a;
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};
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static A Ctor(A const &src)
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{
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A result(src); // this should not cause a const violation
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result = src; // and neither should this
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return result;
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}
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typedef __SIZE_TYPE__ size_t;
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void *operator new(size_t, void *ptr)
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{
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return ptr;
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}
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// check copy ctor and assignment for plain union
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void check_union()
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{
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B b1;
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B b2;
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b1.a = 5;
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b2.a = 6;
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b2 = b1;
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if(b2.a != 5)
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abort();
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b2.a = 6;
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new (&b2) B(b1);
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if(b2.a != 5)
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abort();
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return;
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}
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// check copy ctor and assignment for class containing anon-union
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void check_union_member()
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{
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A a1;
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A a2;
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a1.a = 5;
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a2.a = 6;
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a2 = a1;
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if(a2.a != 5)
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abort();
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a2.a = 6;
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new (&a2) A(a1);
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if(a2.a != 5)
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abort();
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return;
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}
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int main()
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{
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check_union();
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check_union_member();
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return 0;
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}
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