No header files?

[AJ]

"Walter Bright" <newshound1 at digitalmars.com> wrote in message 
news:hbo7fa$316k$2 at digitalmars.com...
> AJ wrote:
>> You lose the ability to use, say a class declaration, as the 
>> specification (at least without a sophisitcated, 
>> code-folding/code-formatting IDE).
>
> Just change "class" to "interface" and you're good to go.

Seems "apples and oranges" to me. "class declaration" can have data members 
while "interface" can't. I mean, "my concept of it". I don't know what 
definitions D has of those things. In C++, I use interfaces where 
appropriate (say, where usage outside of a given library/subsystem is 
anticipated/desired), but for most purposes (say, within a given 
library/subsystem), I want a full class declaration (with data members etc). 
When I think "interface", I think "pure abstract base class" and is 
something strictly behavioral. When thinking "class" or "struct", I think 
first of the data members, something more nominal ("noun-ish").