-Wconversion is very poor

-Wconversion is very poor

[Lisp2D]

I've turned on all warnings to have clean program. 
Turn on -Wconversion but it will not care about BIG trouble in C++:
conversion.

class A{
public:
A(unsigned	int){}
};

class B{
public:
B(A){}
};

B b(-1); //OK without warnings
int	main(void){}

----
-1 => A(FF..FF) => B(FF..FF)
I want to see all program like:

B b(A(-1));

Which warning I must to set?

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Re: -Wconversion is very poor

[Jonathan Wakely]

On 23 March 2011 17:58, Lisp2D wrote:
>
> I've turned on all warnings to have clean program.
> Turn on -Wconversion but it will not care about BIG trouble in C++:
> conversion.
>
> class A{
> public:
> A(unsigned      int){}
> };
>
> class B{
> public:
> B(A){}
> };
>
> B b(-1); //OK without warnings
> int     main(void){}
>
> ----
> -1 => A(FF..FF) => B(FF..FF)
> I want to see all program like:
>
> B b(A(-1));
>
> Which warning I must to set?

Your question is inappropriate for this mailing list, questions about
using or building gcc should go to gcc-help@gcc.gnu.org

Please take any follow up question to that list, thanks.

As clearly documented in the manual, you need -Wsign-conversion in C++
http://gcc.gnu.org/onlinedocs/gcc-4.5.2/gcc/Warning-Options.html#index-Wconversion-368