Fix empty streams as result

[DieMyst]

Handle returning streams in ArrowSem, because they will be processed and canonicalized later in inliners

fixes LNG-83
fixes LNG-84

[github-actions]

Aqua version is v0.0.1-fix-empty-streams-47aca0f-72-1.0

To install it run:

npm login --registry https://npm.fluence.dev
npm i @fluencelabs/aqua@=v0.0.1-fix-empty-streams-47aca0f-72-1.0 --registry=https://npm.fluence.dev

[linear]

LNG-83 Push to stream doesn't work with assigned streams

Aqua:

func emptySugar() -> ?string:
  strStream = *["123", "777"]
  strStream <<- "345"
  <- strStream

Air:

                     (new $strStream
                        (seq
                         (seq
                          (seq
                           (ap "123" $stream-inline)
                           (ap "777" $stream-inline)
                          )
                          (ap "345" $strStream)
                         )
                         (call %init_peer_id% ("op" "identity") [$stream-inline] strStream-fix)

there is a mess with variable names

LNG-84 Function with only stream creation generate incorrect air

aqua:

func emptySugar() -> *string:
  strEmptyStream: *string
  <- strEmptyStream

air:

                    (xor
                     (seq
                      (call %init_peer_id% ("getDataSrv" "-relay-") [] -relay-)
                      (xor
                       (call %init_peer_id% ("callbackSrv" "response") [$strEmptyStream])
                       (call %init_peer_id% ("errorHandlingSrv" "error") [%last_error% 1])
                      )
                     )
                     (call %init_peer_id% ("errorHandlingSrv" "error") [%last_error% 2])
                    )

there is no new expression for strEmptyStream

[alari]

I can't get this message

[alari]

This CollectionRawInliner has a very specific callsite where you already have this assignToName in scope, I suppose

[alari]

Plz remove debug output

[alari]

Maybe

Exports[S].exports
  .map(_.collect{case a@(_, VarModel(_, StreamType(_), _)) => a})
  .flatMap(outsideDeclaredStreams  =>
    Exports[S].scope...
)

would be more readable than a for loop?

[alari]

Do you ever call collectionToModel(..., None)?

[DieMyst]

yes, in unfold