[Bug c++/30331] a const member function can call a non_const member function without const_cast

[hongleij at 126 dot com]

------- Comment #4 from hongleij at 126 dot com  2006-12-30 13:48 -------
(In reply to comment #3)
> the question is : if a const member function can call a non_const member
> function
> without const_cast,
> if fun() changed the member in A,like this:
> //const_test.cpp
> struct A
> {
>   A(unsigned int n)
>   {
>      aa=n;        
>   }
>   void const_fun() const
>   {
>       static_cast<A>(*this).fun();  //ok
>      // fun();       //err  
>   }
>   void fun()
>   {
>      aa=78;
>   }
>   unsigned int aa;
> };
> 
> int main()
> {
>     const A a(56);
>     a.const_fun();
> }
> the sematic of bitwise constness is not confirmed.
> this program is inspired from the book <Effective C++>(third edition)
> Item3: use const whenever possible
  i do hope the compiler at least give a worning!
> 


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30331