Load lua code dynamically, safely

[kexisse]

Is it possible to load a Lua file, and execute it in a safe environment where an error would not cause the main Löve instance to crash?

For example you have a file behavior.lua, you run your main Löve program, edit behavior.lua, hit a button to reload the file, and see changes in the game.

Is this possible?

[dreadkillz]

You can run coroutines like that. Any error in a coroutine will return it to the resume call.

http://www.lua.org/pil/9.1.html

Code: Select all

t = coroutine.create(function () return nil + 1 end)
print(coroutine.resume(t)) --> false, "error message"

EDIT: I forgot about the debug library. Try using that as I believe there's support for protected calls.
EDIT2: Silly me, see pcall in the PiL: http://www.lua.org/pil/8.4.html

[bartbes]

You want pcall, possibly in combination with setfenv.