Re: A: a new bug to old plain C

Hi there!

It should be stated somewhere in C standard. You and your friends opinion
is very important, but it is only an opinion, not a standard :D

Respectfully,
Aleksandr G Povaliaev.


P.S. You example is wrong and irrelevant.You've missed at least one "const"
:D

     void foo(int const *const p)
     {
         int *nonconst_p;
         /*HERE!!!*/ *const* int *const *const pp = &nonconst_p;
         *pp = p;
         *nonconst_p = 42;
     }


ср, 26 нояб. 2025 г. в 09:27, Simon Richter <[email protected]>:

> Hi,
>
> On 11/26/25 3:14 PM, Александр Поваляев via Gcc-help wrote:
>
> > Could somebody point out where in the C standard a conversion "Foo**" ->
> > "const Foo * const * const" is prohibited?
>
> It's disallowed because
>
>      void foo(int const *const p)
>      {
>          int *nonconst_p;
>          int *const *const pp = &nonconst_p;
>          *pp = p;
>          *nonconst_p = 42;
>      }
>
> would allow overwriting a variable passed in as pointer-to-const.
>
>     Simon
>