property syntax strawman

[Oliver Hoog]

> ---
> bool foo {
>     in(bar) { ... }
>     out { return ... }
> }
> ---

Actually it's also enough with the surrounding scope.
And fast to write, just one line:
bool foo in(bar) {...} out {...}

Everyone that sees this for the first time can see what it means. And 
it's more intuitive syntax than

   bool empty { ... }
   void empty=(bool b) { ... }

With the first syntax above you would have to specify the type (bool in 
this case) only once.