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Programmer en langage C++
book

Programmer en langage C++

by Claude Delannoy
July 2011
Intermediate to advanced
822 pages
20h 28m
French
Eyrolles
Content preview from Programmer en langage C++
 

21

 

Les fonctions virtuelles

et le polymorphisme

 

Nous avons vu qu’en C++ un pointeur sur un type d’objet pouvait recevoir l’adresse de n’importe quel objet descendant. Toutefois, comme nous l’avons constaté au paragraphe 6.3 du chapitre 19, à cet avantage s’oppose une lacune importante : l’appel d’une méthode pour un objet pointé conduit systématiquement à appeler la méthode correspondant au type du pointeur, et non pas au type effectif de l’objet pointé lui-même.

Cette lacune provient essentiellement de ce que, dans les situations rencontrées jusqu’ici, C++ réalise ce que l’on nomme une ligature statique1, ou encore un typage statique. Le type d’un objet (pointé) y est déterminé au moment de la compilation. Dans ces conditions, le mieux que ...

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Publisher Resources

ISBN: 9782212167481