Re: 回复： Passing expression as a parameter

[Enrico Colombini <erix@...>]

On 09/01/2013 17.52, pass86 wrote:
> I have 3 potential solutions so far:
>
> 1) wait(“<some condition>”);
> The wait function takes a string, and evaluates it as a chunk until it returns true
>
> 2) repeat yield() until <some condition>;
>
> 3) yield( function return <some condition> end);
> yield will return a function, the engine will store it in the registry and keep calling it until it returns true

If I remember correctly (it was some time ago) I started Lua game event 
handlers as coroutines, passing each of them a unique ID and storing 
them in an ID-indexed table.
When a handler needed to wait for something (e.g. for the end of an 
animation) the scripting API function (e.g. Walk(character, toPlace)) 
notified the (C++) engine to start the requested action, then yielded.
At the appropriate time (e.g. animation ended), the engine resumed the 
handler using the same ID to identify the coroutine to be resumed.

--
  Enrico