abstract Coroutine<T>

Coroutine is the type of functions that are coroutines, which the compiler treats in a special way. The type parameter T represents the signature of the function itself.

The compiler automatically uses this type for any @:coroutine function:

class C {
	@:coroutine static function staticCoro() {}
	@:coroutine function memberCoro(s:String) {}

	public function new() {
		$type(staticCoro); // haxe.coro.Coroutine<() -> Void>
		$type(memberCoro); // haxe.coro.Coroutine<(s : String) -> Void>
		$type(@:coroutine function localCoro() return "foo"); // haxe.coro.Coroutine<() -> String>
	}
}

The @:coroutine metadata can be omitted when the expected type is Coroutine:

function expectCoro(c:haxe.coro.Coroutine<Int->String>) {}
expectCoro(function(i:Int) return Std.string(i));