about lambdas

[Michael]

Thanks guys)

>
> auto With(alias fun, I)(I o) // maybe add a template constraint 
> here
> {
> 	static if(isAssignable!(I, typeof(null)))
> 		return o is null ? null : fun(o);
> 	else
> 		return fun(o);
> }
>
> foreach(p; persons)	
>     p.With!(x => x.address);
>

Now if I want add a somewhat task into expression "x => 
x.address", for example "writeln(x.address)", a code should be 
rewritten like

>
> foreach(p; persons)
>     p.With!(x => {writeln(x.address); return x.address;}());
>

As I understand, right part of expression above - "{ ... }()" is 
anonymous function (or delegate, or closure) that immediately 
called in lambda expression. Right? Is right behaviour?