More information on Vapor 4 alpha releases:

https://medium.com/@codevapor/vapor-4-alpha-1-releases-begin-94a4bc79dd9a

API Docs:

https://api.vapor.codes/async-kit/master/AsyncKit/index.html

EventLoopFuture Operators

Adds standard operators to future types, so if you have for example, two EventLoopFuture<Int>, you can add them together:

let future1 = eventLoop.future(1)
let future2 = eventLoop.future(2)
let future3 = future1 + future2

Here's a list of all the operators:

+
+=
-
-=
*
*=
%
%=
&
&=
/
/=
>
>=
<
<=
<<
<<=
>>
>>=
^
^=
|
|=
~