feat: include initial Future impl

lib/future.luau

@@ -0,0 +1,76 @@
+local task = require("@lune/task")
+
+local mod = require("../mod")
+local Signal = mod.signal
+type Signal<T...> = mod.Signal<T...>
+
+local option = require("option")
+type Option<T> = option.Option<T>
+local Some = option.Some
+local None = option.None
+
+local Future = {}
+export type Status = "initialized" | "running" | "cancelled" | "done"
+export type Future<T> = typeof(Future) & {
+	_fn: (set: (value: T) -> ()) -> T,
+	_ret: T?,
+	_thread: thread,
+	_spawnEvt: Signal<()>,
+	_retEvt: Signal<T, Status>,
+	_status: Status,
+}
+
+function Future.new<T>(fn: (...any) -> T, args: { any })
+	return setmetatable(
+		{
+			_thread = coroutine.create(function(spawnEvt: Signal<()>, retEvt: Signal<T, Status>)
+				spawnEvt:Fire()
+
+				local ret = fn(table.unpack(args))
+				retEvt:Fire(ret, "done")
+			end),
+
+			_spawnEvt = Signal.new(),
+			_retEvt = Signal.new(),
+			_status = "initialized",
+		} :: Future<T>,
+		{
+			__index = Future,
+		}
+	)
+end
+
+function Future.poll<T>(self: Future<T>): (Status, Option<T>)
+	if self._status == "initialized" then
+		self._retEvt:Connect(function(firedRet, status: Status)
+			self._status = status
+			self._ret = firedRet
+
+			-- Cleanup
+			coroutine.yield(self._thread)
+			coroutine.close(self._thread)
+
+			self._spawnEvt:DisconnectAll()
+			self._retEvt:DisconnectAll()
+		end)
+
+		self._spawnEvt:Connect(function()
+			self._status = "running"
+		end)
+
+		coroutine.resume(self._thread, self._spawnEvt, self._retEvt)
+	end
+
+	if self._status == "running" then
+		-- Just wait a bit more for the signal to fire
+		task.wait(0.01)
+	end
+
+	local retOpt = if self._ret == nil then None() else Some(self._ret)
+	return self._status, retOpt
+end
+
+function Future.cancel<T>(self: Future<T>)
+	self._retEvt:Fire(nil :: any, "cancelled")
+	self._status = "cancelled"
+end

mod.luau

@@ -0,0 +1,14 @@
+local luau = require("@lune/luau")
+local fs = require("@lune/fs")
+
+local SIGNAL_PATH = "Packages/_Index/ffrostflame_luausignal@0.2.4/luausignal/src/init.luau"
+local _signal = require(SIGNAL_PATH)
+export type Signal<T...> = _signal.luauSignal<T...>
+local signal: {
+	new: <T...>() -> Signal<T...>,
+} =
+	luau.load('local task = require("@lune/task")\n' .. fs.readFile(SIGNAL_PATH))()
+
+return {
+	signal = signal,
+}

wally.lock

@@ -0,0 +1,13 @@
+# This file is automatically @generated by Wally.
+# It is not intended for manual editing.
+registry = "test"
+
+[[package]]
+name = "compeydev/rusty-luau"
+version = "0.1.0"
+dependencies = [["luausignal", "ffrostflame/luausignal@0.2.4"]]
+
+[[package]]
+name = "ffrostflame/luausignal"
+version = "0.2.4"
+dependencies = []

wally.toml

@@ -8,3 +8,4 @@ exclude = ["tests/**", "examples/**", "**"]
 include = ["lib/**", "LICENSE.md", "README.md", "wally.toml"]
 
 [dependencies]
+luausignal = "ffrostflame/luausignal@0.2.4"