How to "scope"?

[Martin]

On Monday, 3 February 2014 at 17:58:43 UTC, Namespace wrote:
> On Monday, 3 February 2014 at 17:50:33 UTC, Martin wrote:
>> On Monday, 3 February 2014 at 17:43:09 UTC, Namespace wrote:
>>> On Monday, 3 February 2014 at 17:32:07 UTC, Martin wrote:
>>>> Oops, I of course meant:
>>>>
>>>> static Test createFromString(string str)
>>>> {
>>>> return new Test(str);
>>>> }
>>>
>>> You _can_ use scoped but it may allocate way to much and it's 
>>> ugly to use:
>>> http://dlang.org/phobos/std_typecons.html#.scoped
>>>
>>> AFAIK scope'd classes was only deprecated because it _can_ be 
>>> solved with a library solution and scope is/was not fully 
>>> implemented. So it was more easy to depecate it and replace 
>>> it with a library solution, as to implement scope as it stand 
>>> in the docs.
>>
>> I'm aware of "scoped", that's why I used this specific 
>> example. How do you use scoped on a function that returns a 
>> new instance of some object?
>>
>> auto obj = scoped(functionThatReturnsNewObject());
>>
>> That obviously doesn't work.
>
> In this case where your object already exist and is on the 
> geap, you may want to use Unique:
>
> ----
> import std.stdio;
> import std.typecons;
>
> class Foo {
> 	~this() {
> 		writeln("Foo::DTor");
> 	}
> }
>
> Foo createNewFoo() {
> 	return new Foo();
> }
>
> void main() {
> 	{
> 		writeln("Startt");
> 		Unique!(Foo) obj = Unique!(Foo)(createNewFoo());
> 		writeln("End");
> 	}
> 	
> 	writeln("end of main");
> }
> ----

That's exactly what I was looking for. Brilliant, thanks!