passing by reference... my darkest enemy
actual reason below:
In your case (without reference) the compiler generates a temporary object (int) for the first argument of your MyApplication constructor. You pass this temporary int to QApplication’s constructor (with int reference), which saves the address of this reference. Once your MyApplication constructor is done the temporary int is destroyed but QApplication still has its address.
/*
* Hedgewars, a free turn based strategy game
* Copyright (c) 2005-2011 Andrey Korotaev <unC0Rr@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifndef ACHIEVEMENTS_H
#define ACHIEVEMENTS_H
#define MAX_ACHIEVEMENTS 128
// This is just for testing and far from being complete - everything might change so don't use it anywhere!
enum achflags
{
ACH_FLAGS_NONE = 0x00,
ACH_FLAGS_HIDDEN = 0x01,
ACH_FLAGS_INACTIVE = 0x02,
// UNKNOWN = 0x04,
// UNKNOWN = 0x08,
// UNKNOWN = 0x10,
// UNKNOWN = 0x20,
// UNKNOWN = 0x40,
// UNKNOWN = 0x80,
};
struct achievement
{
const char *id;
const char *caption;
const char *description;
const char *image;
const int goal;
const int flags;
};
extern const char achievements[][6][256];
#endif // ACHIEVEMENTS_H