1 files changed, 32 insertions, 0 deletions
diff --git a/tests/misc/teventemitter.nim b/tests/misc/teventemitter.nim
new file mode 100644
index 000000000..7da1a2522
--- /dev/null
+++ b/tests/misc/teventemitter.nim
@@ -0,0 +1,32 @@
+discard """
+  output: "pie"
+"""
+
+import tables, lists
+
+type
+  EventArgs = object of RootObj
+  EventEmitter = object of RootObj
+    events*: Table[string, DoublyLinkedList[proc(e: EventArgs) {.nimcall.}]]
+
+proc emit*(emitter: EventEmitter, event: string, args: EventArgs) =
+  for fn in nodes(emitter.events[event]):
+    fn.value(args) #call function with args.
+
+proc on*(emitter: var EventEmitter, event: string,
+         fn: proc(e: EventArgs) {.nimcall.}) =
+  if not hasKey(emitter.events, event):
+    var list: DoublyLinkedList[proc(e: EventArgs) {.nimcall.}]
+    add(emitter.events, event, list) #if not, add it.
+  append(emitter.events[event], fn)
+
+proc initEmitter(emitter: var EventEmitter) =
+  emitter.events = initTable[string,
+    DoublyLinkedList[proc(e: EventArgs) {.nimcall.}]]()
+
+var
+  ee: EventEmitter
+  args: EventArgs
+initEmitter(ee)
+ee.on("print", proc(e: EventArgs) = echo("pie"))
+ee.emit("print", args)