constraintmap.h

来自「压缩包里有教材<<C++模式设计-基于QT4开源跨平台开发框架&gt」· C头文件 代码 · 共 22 行

#ifndef CONSTRAINTMAP_H
#define CONSTRAINTMAP_H

/* included class definitions: */
#include <QHash>
#include <QString>

class Constraint; /* forward declaration */

class ConstraintMap : public QHash<QString, Constraint*> { /* Needs
      definitions of QHash and QString, but only the 
      declaration of Constraint, because it's a pointer. */

private:
    Constraint* m_Constraintptr;  /* No problem, it's just a pointer. */
//  Constraint m_ConstraintObj;   /* error: incomplete type */
    void addConstraint(Constraint& c); /* using forward declaration */  
};

#endif        //  #ifndef CONSTRAINTMAP_H