Re: [Liberty-eiffel] Warnign about 'const' qualifier

[Paolo Redælli]

Il 13/03/2018 19:32, Germán Arias ha scritto:
> Hi,
>
> I have a C function like this:
>
> const char* IupConfigGetVariableStr(Ihandle* ih, const char* group,
>                                      const char* key);
>
>
> When I call it from Eiffel I get this warning:
>
> warning: assignment discards ‘const’ qualifier from pointer target type
> [enabled by default]
>
> I assign the returned value to a POINTER, and then make a string from
> it. It works fine but is there a way to remove this warning?
I was going to write "use FIXED_STRING" which is exactly whay a "const 
char*" is when dealing with strings but the issue is that POINTER is 
"void *" and not "const void*" .

Currently you have to cast the type when you declare the feature; a 
quick (dirty, I admit) hack would be:

feature_name "(void*) IupConfigGetVariableStr"

or define a similar macro in the plugin/c

I'll try as soon as I'm at home this evening.

I suspect that we really need something like "CONST_POINTER"...