call/cc in Lua - Possible?

Question

The Wikipedia article on Continuation says:
\"In any language which supports closures, it is possible to write programs in continuation passing style an

Answer 1

The key phrase is

It is possible to implement programs in continuation-passing style

(Emphasis mine.) You do this by taking regular "direct-style" programs and converting them to continuation-passing style (CPS) by a program transformation called the CPS transform. The key is that the CPS transform of call/cc is a simple function.

This is not practical for programmers. The CPS transform has two uses:

• As a theoretical idea for studying language features, especially control operators
• As a pass in a compiler that uses CPS as an intermediate language

You don't want to go anywhere near doing CPS transforms on Lua code, especially not by hand.