| Topic: |
DEVELOP > c-Plus-Plus |
| User: |
"Dan" |
| Date: |
28 May 2006 07:20:43 AM |
| Object: |
Error C3440 on overloaded operator [] |
Hi. I'm fairly new to C++, and am getting an error when trying to
overload the [] operator.
Here's an example of the problem ...
class CMyClass
{
};
class CMyClassCollection
{
public:
CMyClass* operator [] (unsigned int index) const
{
return my_list [index];
}
private:
vector <CMyClass *> my_list;
};
void CMyCodeClass::do_stuff ()
{
CMyClassCollection my_collection;
... initialise my_collection here
CMyClass *my_class = my_collection [0];
}
The last line of the do_stuff function gives me this compiler error
message ...
error C2440: 'initializing' : cannot convert from 'CMyClass *' to
'CMyCodeClass::CMyClass *'
Types pointed to are unrelated; conversion requires reinterpret_cast,
C-style cast or function-style cast
Any ideas what this means?
Thanks for any help,
- Dan
.
|
|
| User: "Tomás" |
|
| Title: Re: Error C3440 on overloaded operator [] |
28 May 2006 09:22:05 AM |
|
|
Dan posted:
Hi. I'm fairly new to C++, and am getting an error when trying to
overload the [] operator.
The following code compiles without error or warning for me:
#include <vector>
using std::vector;
class CMyClass
{
};
class CMyClassCollection
{
public:
CMyClass* operator [] (unsigned int index) const
{
return my_list [index];
}
private:
vector <CMyClass *> my_list;
};
struct CMyCodeClass {
void do_stuff();
};
void CMyCodeClass::do_stuff ()
{
CMyClassCollection my_collection;
//... initialise my_collection here
CMyClass *my_class = my_collection [0];
}
int main() {}
-Tomás
.
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