partial class

[Denis Koroskin]

On Fri, 31 Oct 2008 20:06:42 +0300, KennyTM~ <kennytm at gmail.com> wrote:

> Denis Koroskin wrote:
>> On Fri, 31 Oct 2008 17:37:42 +0300, Mike James <foo at bar.com> wrote:
>>
>>> Not sure if this has been suggested before as an addition to D but  
>>> what about introducing a partial class as per C# - with all the  
>>> benefits it would bring...
>>>
>>> -=mike=-
>>   I must be missing something, but D already supports defining class  
>> methods in one file and implementing them in another one.
>
> Something like this:
>
>
> partial class A {
>      int someMember;
>      public A(int x) { someMember = x; }
> }
>
> // Far, far apart
>
> partial class A {
>      public int getSomeMember() { return someMember; }
> }
>
>
> class X {
>      static void Main() {
>          var someA = new A(12);
>          System.Console.WriteLine(someA.getSomeMember());
>      }
> }

Is this worth the trouble? You can have

class A {
     int someMember;
     public A(int x) { someMember = x; }
     public int getSomeMember();
}

in one module and implement getSomeMember() in another module. I believe  
all the class methods should be defined in one place so that user don't  
need to import class definition from multiple places. This also makes  
semantic analysis more complex.