Doubt regarding the member function declaration

[glathaa]

Hi,

I have seen the following type of declaration stl_map.h file.

...
iterator find(const key_type& __x) { return _M_t.find(__x); }
const_iterator find(const key_type& __x) const { return _M_t.find(__x); }
...

Two member functions are having the same name, but returning two different data types? Is it function overloading? please tell me what it means?

Regards,
Latha.G

 

[xwb]

The second is for const classes. A const class will not be routed to the first definition.

 

[glathaa]

What is meant by const class? Can you give a small example for it?

Thanks in advance