31 lines
893 B
Nim
31 lines
893 B
Nim
discard """
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output: "pie"
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"""
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import tables, lists
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type
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TEventArgs = object of TObject
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TEventEmitter = object of TObject
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events*: TTable[string, TDoublyLinkedList[proc(e: TEventArgs)]]
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proc emit*(emitter: TEventEmitter, event: string, args: TEventArgs) =
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for func in nodes(emitter.events[event]):
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func.value(args) #call function with args.
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proc on*(emitter: var TEventEmitter, event: string, func: proc(e: TEventArgs)) =
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if not hasKey(emitter.events, event):
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var list: TDoublyLinkedList[proc(e: TEventArgs)]
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add(emitter.events, event, list) #if not, add it.
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append(emitter.events.mget(event), func)
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proc initEmitter(emitter: var TEventEmitter) =
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emitter.events = initTable[string, TDoublyLinkedList[proc(e: TEventArgs)]]()
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var
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ee: TEventEmitter
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args: TEventArgs
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initEmitter(ee)
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ee.on("print", proc(e: TEventArgs) = echo("pie"))
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ee.emit("print", args)
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