Hi Mark,

It is possible but the solution is too inefficient to be usable. 
See 
http://smellegantcode.wordpress.com/2012/12/28/a-pure-library-approach-to-asyncawait-in-standard-javascript/

Bruno

On Friday, October 24, 2014 6:44:41 AM UTC+2, Mark Hahn wrote:
>
> I've been following async to sync discussions for years but I have one 
> fundamental question.  Is it possible to wrap an async function in a 
> library such that it can be called from code that is written expecting a 
> sync function?  In other words could I make a library containing a 
> readFileSync function that uses fs.readFile?
>
> Using something like generators inside the library is legal as long as the 
> caller isn't aware of this.  Requiring the caller code to do a transpile is 
> not legal.
>
> I should mention that this is for a node environment emulation that places 
> calls over the network using proxies.  The readFileSync code obviously 
> can't go in a busy-wait loop waiting for the result from the net.
>

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