Lua Coroutines

Coroutines in Lua are related to [[Generators (Python)]]. They allow a function to be written to return intermittantly using the yield() function call on the coroutine table. The coroutine is created by passing a function to the coroutine.create(f) function. It returns a value of type thread, which can then be passed to coroutine.resume(t), which will run the code until the next coroutine.yield call or return.

Calls to resume are run in [[protected mode (Lua)]], which means errors won't be raised, but returned as a string to the caller.

The Roblox API includes a coroutine.wrap(f) function, which returns a function that can be called without requiring resume.