remove IOStreams, support optional polling in Ops

3 files changed, 3 insertions, 62 deletions

diff --git a/alv/result/base.moon b/alv/result/base.moon
index 734d614..a9a668d 100644
--- a/alv/result/base.moon
+++ b/alv/result/base.moon
@@ -1,7 +1,7 @@
 ----
 -- base Result interface.
 --
--- implemented by `Constant`, `SigStream`, `EvtStream`, and `IOStream`.
+-- implemented by `Constant`, `SigStream`, and `EvtStream`.
 --
 -- @classmod Result
 import Type from require 'alv.type'
@@ -11,7 +11,7 @@ class Result
 --- Result interface.
 --
 -- Methods that have to be implemented by `Result` implementations
--- (`SigStream`, `EvtStream`, `IOStream`).
+-- (`Constant`, `SigStream`, `EvtStream`).
 --
 -- @section interface
 
@@ -38,8 +38,7 @@ class Result
 
   --- the metatype string for this Result.
   --
-  -- one of `=` (`Constant`), `~` (`SigStream`),
-  -- `!` (`EvtStream` and `IOStream`).
+  -- one of `=` (`Constant`), `~` (`SigStream`), `!` (`EvtStream`).
   --
   -- @tfield string metatype
 
diff --git a/alv/result/init.moon b/alv/result/init.moon
index 200e4e1..8e5c64f 100644
--- a/alv/result/init.moon
+++ b/alv/result/init.moon
@@ -5,17 +5,14 @@
 -- @see Constant
 -- @see SigStream
 -- @see EvtStream
--- @see IOStream
 --
 -- @module result
 import Constant from require 'alv.result.const'
 import SigStream from require 'alv.result.sig'
 import EvtStream from require 'alv.result.evt'
-import IOStream from require 'alv.result.io'
 
 {
   :Constant
   :SigStream
   :EvtStream
-  :IOStream
 }
diff --git a/alv/result/io.moon b/alv/result/io.moon
deleted file mode 100644
index f68f672..0000000
--- a/alv/result/io.moon
+++ /dev/null
@@ -1,55 +0,0 @@
-----
--- Stream of external side-effects.
---
--- Unlike other `Stream`s, this is not updated/set by an `Op` instace, but is
--- continuously polled for changes by the runtime and may mark itself as
--- *dirty* at any point in time. All runtime execution happens due to IOStream
--- updates, which ripple through the `RTNode` tree.
---
--- @classmod IOStream
-import EvtStream from require 'alv.result.evt'
-
-class IOStream extends EvtStream
---- IOStream interface.
---
--- methods that have to be implemented by `IOStream` implementations.
--- @section interface
-
-  --- construct a new IOStream.
-  --
-  -- Must prepare the instance for `dirty` to be called.
-  -- The super-constructor should be called to set `Result.type`.
-  --
-  -- @classmethod
-  -- @tparam type.Type type the type of this stream.
-  new: (type) => super type
-
-  --- create a mutable copy of this stream.
-  --
-  -- Used to wrap insulate eval-cycles from each other.
-  --
-  -- @treturn IOStream
-  fork: => @
-
-  --- poll for changes.
-  --
-  -- Called every frame by the main event loop to update internal state.
-  poll: =>
-
-  --- check whether this adapter requires processing.
-  --
-  -- Must return a boolean indicating whether `Op`s that refer to this instance
-  -- via `Input.hot` should be notified (via `Op:tick`). May be called multiple
-  -- times. May be called before `poll` on the first frame after construction.
-  --
-  -- If this is not overriden, the `EvtStream` interface can be used, see
-  -- `EvtStream.add`, `EvtStream.unwrap`, and `EvtStream.dirty`.
-  --
-  -- @function dirty
-  -- @treturn bool whether processing is required
-
-  __inherited: (cls) => cls.__base.__tostring or= @__tostring
-
-{
-  :IOStream
-}