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POReal-world usage of Lua co-routines/continuation serialization to simplify async logic?
 

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  1. POReal-world usage of Lua co-routines/continuation serialization to simplify async logic?
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    <p>The <a href="http://lua-users.org/wiki/PlutoLibrary" rel="noreferrer">Pluto library</a> for <a href="http://www.lua.org/about.html" rel="noreferrer">Lua</a> claims to be able to serialize Lua co-routines. I interpret this as meaning 'serializeable continuations', which is an important feature for making asyncronous programming writeable in a syncronous style.</p> <p>For example, a workflow can be expressed linearly instead of requiring named entry points</p> <pre><code>if (ask user is hungry) then if (not ask user is vegetarian) then if (ask user if likes_burgers) then feed_user(burger) else tell_user("Picky!") else feed_user(salad) </code></pre> <p>instead of</p> <pre><code>function main() ask(user is hungry, "hungry_response") function hungry_response(answer) if (answer is yes) ask(user is vegetarian, "vegetarian_response") function vegetarian_response(answer) if (answer is yes) feed_user(salad) else ask(user likes burgers, "burgers_response") function burgers_response(answer) if (answer is yes) then feed_user(burger) else tell_user("Picky!") </code></pre> <p>While if statements translated into the previous style aren't bad, things get very complicated once you involve local variables, loops, nested function calls, etc.</p> <p>This is where serializeable continuations become critically important.</p> <p><a href="http://www.baum.com.au/~jiri/ae/blog/01102082319" rel="noreferrer">Serialized continuations</a> are used in JavaFlow, Cocoon (Rhink), Seaside, PLT Scheme, SICS, and are great for dealing with business workflows, medical diagnostics, and (in my case), textual adventure games. </p> <p><strong>Are there any examples (hopefully open source!) of Lua and Pluto leveraging their features in this way, using continuations to simplify logic in an async environment?</strong></p>
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