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Diffstat (limited to 'docs/internals')
| -rw-r--r-- | docs/internals/extensions.md | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/docs/internals/extensions.md b/docs/internals/extensions.md index bc07e58..e541d9a 100644 --- a/docs/internals/extensions.md +++ b/docs/internals/extensions.md @@ -155,7 +155,7 @@ There are four types of `Result`s that can be created: to the same value it already had. They are updated using `SigStream:set`. - `EvtStream`s transmit *momentary events*. They can transmit multiple events in a single tick. `EvtStream`s do not keep a value set on the last tick on - the next tick. They are updated using `EvtStream:add`. + the next tick. They are updated using `EvtStream:set`. - `IOStream`s are like `EvtStream`s, but their `IOStream:poll` method is polled by the event loop at the start of every tick. This gives them a chance to effectively create changes 'out of thin air' and kickstart the execution @@ -190,19 +190,19 @@ will be necessary. To implement a custom IOStream, create it as a class that inherits from the `IOStream` base and implement the constructor and `IOStream:poll`: - import IOStream from require 'alv.base' + import T, IOStream from require 'alv.base' class UnreliableStream extends IOStream - new: => super 'bang' + new: => super T.bang poll: => if math.random! < 0.1 - @add true + @set true In the constructor, you should call the super-constructor `EvtStream.new` to set the event type. Often this will be a custom event that is only used inside your extension (such as e.g. the `midi/port` type in the [midi][modules-midi] -module), but it can also be a primitive type like `'num'` in this example. In +module), but it can also be a primitive type like `T.bang` in this example. In `:poll`, your IOStream is given a chance to communicate with the external world and create any resulting events. The example stream above randomly sends bang events out, with a 10% chance each 'tick' of the system. Note that there is no |