lazycat.manatee:
Hi all,
I'm research to build a hot-swap Haskell program to developing itself in Runtime, like Emacs.
Essentially, Yi/Xmonad/dyre solution is "replace currently executing" technology:
re-compile new code with new binary entry
when re-compile success $ do save state before re-launch new entry replace current entry with new binary entry (executeFile) store state after re-launch new entry
There are some problems with re-compile solution:
1) You can't save *all* state with some FFI code, such as gtk2hs, you can't save state of GTK+ widget. You will lost some state after re-launch new entry.
2) Sometimes re-execute is un-acceptable, example, you running some command in temrinal before you re-compile, you need re-execute command to restore state after re-launch, in this situation re-execute command is un-acceptable.
I wonder have a better way that hot-swapping new code without re-compile/reboot.
Well, the other approach to reloadable modules, using either object code plugins, or bytecode plugins, giving you module-level granularity. -- Don