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0001 /*
0002     Copyright (C) 2015 Volker Krause <vkrause@kde.org>
0003 
0004     This program is free software; you can redistribute it and/or modify it
0005     under the terms of the GNU Library General Public License as published by
0006     the Free Software Foundation; either version 2 of the License, or (at your
0007     option) any later version.
0008 
0009     This program is distributed in the hope that it will be useful, but WITHOUT
0010     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0011     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
0012     License for more details.
0013 
0014     You should have received a copy of the GNU General Public License
0015     along with this program.  If not, see <https://www.gnu.org/licenses/>.
0016 */
0017 
0018 struct Base {
0019     virtual void pure() = 0;
0020     virtual void baseOnly() {};
0021     virtual void overridden() {};
0022 };
0023 
0024 struct Derived : public Base {
0025     void pure() override {};
0026     void overridden() override {};
0027 };
0028 
0029 struct BaseWithoutVirtuals {
0030     void *m_b;
0031 };
0032 
0033 struct DerivedFromBaseWithoutVTable : BaseWithoutVirtuals {
0034     virtual void function() {};
0035     void *m_d;
0036 };
0037 
0038 int main (int, char**)
0039 {
0040     // make sure the structures aren't optimized away by the compiler
0041     unsigned long long dummy = 0;
0042     #define USED(StructType) { StructType s; dummy += (unsigned long long)&s; }
0043 
0044     USED(Derived);
0045     USED(DerivedFromBaseWithoutVTable);
0046 
0047     return dummy;
0048 }