* -Wconversion is very poor
@ 2011-03-23 18:37 Lisp2D
2011-03-23 18:45 ` Jonathan Wakely
0 siblings, 1 reply; 2+ messages in thread
From: Lisp2D @ 2011-03-23 18:37 UTC (permalink / raw)
To: gcc
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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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: -Wconversion is very poor
2011-03-23 18:37 -Wconversion is very poor Lisp2D
@ 2011-03-23 18:45 ` Jonathan Wakely
0 siblings, 0 replies; 2+ messages in thread
From: Jonathan Wakely @ 2011-03-23 18:45 UTC (permalink / raw)
To: Lisp2D; +Cc: gcc
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
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2011-03-23 18:37 -Wconversion is very poor Lisp2D
2011-03-23 18:45 ` Jonathan Wakely
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