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-h...@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
