Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.old-deja/g++.jason/dcast3.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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// { dg-do run } // Testcase for tricky dynamic cast situations. struct A { virtual void f () { } }; struct B : public A { }; struct C : public B { }; struct D : public B { }; struct E : public C, public D { }; struct B2 : public virtual A { }; struct C2 : public B2 { }; struct D2 : public B2 { }; struct E2 : public C2, public D2 { }; int main () { E e; E2 e2; A* ap = (C*)&e; // ap points to base subobject of unique B; succeeds if (dynamic_cast <B*> (ap) == 0) return 1; ap = (C2*)&e2; // ap points to base subobject shared by two Bs; fails if (dynamic_cast <B2*> (ap) != 0) return 2; }