AW: AW: Feature request for "friendship" of pointers in "C"

Mon Feb 3 09:38:00 GMT 2020

Hi, as i mentioned earlier… the "not having" create a couple of problems:

1. the "void-pointer-inflation"
    you can rewrite "method_base(struct base* hdl, ...)" win
    "method_base(void* hdl, ...)" this seems to solve the problem
    BUT you definitely loos the type-check because other pointer as "A" 
and "B"
    also allowed.

2. the "cast inflation"
    you can add the "CPP" wrapper to "method_base" this will act like 
    but you loose the "type-check also"

3. even if you use "&aObj->obj" this create EXTRA CODE which add only 
    and add EXTRA overhead…

3. there is only ONE clear solution which NOT loose the "type-checking" 
and DON'T add
    extra code and this solution is the "frienddef"

mfg AO

On 03.02.20 10:20, J Decker wrote:
> On Mon, Feb 3, 2020 at 1:10 AM aotto < 
> <>> wrote:
>     On 03.02.20 10:07, J Decker wrote:
>     > On Mon, Feb 3, 2020 at 12:23 AM aotto <
>     <>> wrote:
>     >
>     >> Hi,
>     >>
>     >> there is an easy test, if Stefan is right and I'm wrong.
>     >>
>     >> 1. cast an INVALID Pointer to "aObj"
>     >>
>     > how would friend prevent an invalid pointer pass?
>     → I have a pointer-type-and-valid test in my software, this mean
>        I know if a pointer is "valid" or not... but this works only if
>        I get the pointer into my "base_method".
> C doesn't have any such thing, no do any other developer, so how would 
> it help them? (you fell off the list)

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