Alias to struct memembers of a function paramater as a shortcut => need this for XYZ of type void*

[ag0aep6g]

On 07.04.19 14:23, Robert M. Münch wrote:
> struct X {
>      TYPE a;
>      TYPE b;
> }
> 
> 
> myFunc(X _struct){
>      alias a = _struct.a;
> 
>      a = myOtherFunc();
> }
> 
> 
> X myStruct;
> 
> myFun(myStruct);
> 
> 
> This gives an error: need this for a of type void*
> 
> I don't understand why, because all I want is a shortcut the symbol of 
> the parameter.

You can't make an alias to a field of an object. The alias will be made 
in relation to the type instead. (If that makes sense. I'm not sure how 
to phrase it best.)

In code, this:

     alias a = _struct.a;

is the exact same as this:

     alias a = X.a;

The instance `_struct` is not part of the alias.