Based on your statement "the functions within it would be required to translate that input and return results for later use", I'm not sure that nested functions is what you want. You say that when you have two global functions your code works:
function func1(args)
...
end
function func2(args)
...
end
but when you nest (for example) func1
inside func2
, it no longer works. Lua does allow you to define nested functions, but I can only think of two reasons to use them:
- to return a function that encapsulates a task, usually with some of the wrapper function's args and/or locals as upvalues.
- to encapsulate some logic in a function to be called from within the wrapper function, with no need for any other functions to call it.
For example of case 1:
function func2(a, b, c)
function func1()
do something with a, b, c eventhough they are not args of func1
return result
end
return func1
end
someFunc = func2(1,2,3)
....
result = someFunc() -- calls func1 created inside func2, using 1,2,3
For example of case 2:
function func2(a, b, c)
function func1()
do something with a, b, c eventhough they are not args of func1
return result
end
result = func1()
...
end
func2(1,2,3)
You could also add a nested function to a table object (class) passed as argument, but I see this as a variation on case 1.