Tuple1..22 and the like create unnecessary additional classes

[mplatvoet]

Tuple1..22 and the like create unnecessary additional classes

[mplatvoet]

The limitation of vargarg or any other sequence type is that it can only be typed as a whole. Thus when combining/zipping/merging promises of different types you have to resort to a more general type. E.g.:

val p1 : Promise<String, Exception> = //...
val p2 : Promise<Integer, Exception> = //...

//function all does actually exist since 0.1.0 but is undocumented
//since I haven't made my mind up about the signature
val combinedP : Promise<List<Any>, Exception> = all<Any, Exception>(p1, p2)

To use the values you either have to cast the results of new List or I have introduce get() on the promises treat all more like a latch. get() is one of the considerations of introducing.

It would be interesting whether in the future the Kotlin compiler would be flexible enough to retain types for variable lengths of arguments. There seems to be some groundwork for this with functions in the upcoming M12

For now the Tuples serve a distinct purpose and therefor will stay.
Closing this issue since there is no viable alternative yet.

[mplatvoet]

Everything that has to do with combining is moved to a separate project. So you can cherry pick. See http://komponents.myjetbrains.com/youtrack/issue/KOV-5