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Template problems..

Started by bzroom May 12, 2004 at 8:30 PM 3 replies 500+ views

Original Post

137

May 12, 2004 at 8:30 PM

I'm writting sort of a vector class, and when I try to use the array index operator I get an error that I dont understand. Any suggestions? This line: cMaterial *mat = materials[material];

Generates this error: error C2440: 'initializing' : cannot convert from 'SmartList' to 'cMaterial *' with [ T=cMaterial ]

Here is the definition:


SmartList<cMaterial> *materials;

And the function definition:

T* SmartList<class T>::operator[](long index) 
{
	if (list[index])
		return list[index]->object;
	else
		GenError("Invalid Smartlist Index");
}

edit: stupid < >'s [edited by - honayboyz on May 12, 2004 9:30:34 PM] [edited by - honayboyz on May 12, 2004 9:31:59 PM] [edited by - honayboyz on May 12, 2004 9:33:26 PM] [edited by - honayboyz on May 12, 2004 9:34:12 PM]

SiCrane

Mod

473

SiCrane

May 12, 2004 at 8:39 PM

Did you try derefercing the pointer before you applied operator[] to it? i.e.: cMaterial *mat = (*materials)[material];

Sneftel

296

Sneftel

May 12, 2004 at 8:40 PM

Are you sure you mean "SmartList<cMaterial> *materials;", as opposed to "SmartList<cMaterial *> materials;"?

"Sneftel is correct, if rather vulgar." --Flarelocke

bzroom

Author

137

bzroom

May 12, 2004 at 8:44 PM

I think so, heres the whole class def.


template <class T>
class SmartList
{
private:
	struct sEntry
	{
		char *name;
		long dependencys;

		T *object;

		sEntry(char *name_, T* object_);
		~sEntry();
	};

	sEntry **list;
	long listsize;
	long liststep;


public:
	SmartList(long size, long step);
	~SmartList();

	long FindEntry(char *name);
	long AddEntry(char *name, T *object);
	bool RemoveEntry(char *name); //true if actualy deleted, if u care

	bool RemoveEntry(long entry); 
	void Clear();

	T* operator[](long index);
};

bzroom

Author

137

bzroom

May 12, 2004 at 8:47 PM

Good call SiCrane, thank you.

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