coroutine stopping after each line

Code Sharing
1

I’ve been reading up on coroutines and i’m really curious about seeing if its possible to make a coroutine stop after each line of code in the function it’s controlling. What is the internal mechanism used to make a coroutine yield? I’m thinking that if you could make a coroutine for each line in a function you read in, then you could stop thru each line if each coroutine were stored in a table sequentially and you just step thru them one by one. make sense?

for a function like this:

function printNotes( tbl )
    print( "printNotes in: ", printTableToStr( tbl ) )
    local str = ""
    for _,v in ipairs( tbl ) do
        str = str..pitches[math.fmod(math.abs(v-21),12)]..","
    end
    print( "printNotes out:", str )
    return str
end

you’d have to turn each line into a coroutine and store the coroutine in a table. if you kept a counter that was triggered by a button of which line you were on, you could do something like this:

counter = 0
button.onTouch = function() 
   coroutine.resume(crs[counter])
   counter =  counter + 1
end

i’m not sure how you would convert each line into it’s own coroutine, esp. when it comes to for() loops, tho.

2

Why would you want to do that though?

3

there’s your codea debugger

4

Have a look at the Lua debug library. It has hooks that can be called every time the interpreter executes a line:

http://www.lua.org/pil/23.2.html

I don’t think that coroutines can help you here