Re: A: a new bug to old plain C

On 08/12/2025 04:09, Andrey Tarasevich via Gcc-help wrote:
>> Further I also assume that you don't see compiler warnings as disagreeing with you? like in
>>
>> char *a;
>>   int b = a;
>> # warning: initialization of ‘int’ from ‘char *’ makes integer from pointer without a cast [-Wint-conversion]
> 
> Well, once again: language-wise this is a constraint violation, i.e. a hard error.
> 
> The fact that it is reported as a "warning" simply means that your compiler is configured
> to issue a non-aborting diagnostic message for this error (aka "warning"). It is just
> a quirk of the compiler.
> 

Yes.  And since it is sometimes (though rarely) necessary in code to 
convert a pointer to an integer type, it is an example of code where you 
need to use a cast to do things correctly :

	char * a;

	uintptr_t b = (uintptr_t) a;

	char * c = (char *) b;