Revert "Removed multi-arg event handling. Fixes #25"

This reverts commit e16692c.

Author: TheSpyder

.changes/unreleased/Changed-20240124-114817.yaml

@@ -2,29 +2,37 @@
  * The `Event` type represents the strings/symbols used in Node to
  * identify event types for `EventEmitter` and its subclasses, including
  * streams, sockets, and servers.
- *
+ * 
  * Given a type signature `Event.t('a => 'b, 'ty)`, the first type
  * variable, `'a => 'b`, denotes the type signature of the event listener
  * function, and `'ty` denotes the type of the associated `EventEmitter`.
- *
+ * 
  * These abstract `Event.t` types must be passed to `EventEmitter`
  * functions to register event listeners or emit events. By encoding the
  * listener function type in a type variable, we can ensure that each
  * listener has the correct type. The type parameter for the emitter
  * prevents two different emitters from using each other's events.
- *
+ * 
  * While this gives us some degree of type safety, it is still possible
  * to introduce runtime errors with this API. In particular, two or more
  * `Event.t` types can be defined from the same string/symbol, but with
  * different listener types. Therefore, we strongly recommend using
  * 100% unique strings/symbols to define events.
- *
+ * 
  ")
 type t<'listener, 'ty>
 external fromString: string => t<'a => 'b, 'ty> = "%identity"
+external fromString2: string => t<('a, 'b) => 'c, 'ty> = "%identity"
+external fromString3: string => t<('a, 'b, 'c) => 'd, 'ty> = "%identity"
 external fromSymbol: Js.Types.symbol => t<'a => 'b, 'ty> = "%identity"
+external fromSymbol2: Js.Types.symbol => t<('a, 'b) => 'c, 'ty> = "%identity"
+external fromSymbol3: Js.Types.symbol => t<('a, 'b, 'c) => 'd, 'ty> = "%identity"
 external unsafeToString: t<'a => 'b, 'ty> => string = "%identity"
+external unsafeToString2: t<('a, 'b) => 'c, 'ty> => string = "%identity"
+external unsafeToString3: t<('a, 'b, 'c) => 'd, 'ty> => string = "%identity"
 external unsafeToSymbol: t<'a => 'b, 'ty> => Js.Types.symbol = "%identity"
+external unsafeToSymbol2: t<('a, 'b) => 'c, 'ty> => Js.Types.symbol = "%identity"
+external unsafeToSymbol3: t<('a, 'b, 'c) => 'd, 'ty> => Js.Types.symbol = "%identity"
 type case =
   | String(string)
   | Symbol(Js.Types.symbol)

lib/js/test/module/EventEmitterTestLib.bs.js

@@ -7,5 +7,6 @@ module Emitter1 = {
     let symbol: Event.t<Js.Types.symbol => unit, t> = Event.fromSymbol(uniqueSymbol)
     let text: Event.t<string => unit, t> = Event.fromString("text")
     let integer: Event.t<int => unit, t> = Event.fromString("integer")
+    let textAndInteger: Event.t<(string, int) => unit, t> = Event.fromString2("textAndInteger")
   }
 }