Re: Features you would like to see
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- Subject: Re: Features you would like to see
- From: Niklas Frykholm <niklas@...>
- Date: 2007年8月23日 17:16:40 +0200
yes, we use C++ preprocessor for this purpose, but it is very hard to
debug such code, it would be much easier to have this function
implemented in Lua.
I added #ifdef functionality it to my project using token filters
See http://lua-users.org/lists/lua-l/2007-05/msg00176.html
It is easy to do and works well.
But, actually, the main feature we need - it's Edit & Continue, it
would be orders of magnitude easier to debug programs with it.
Getting Edit & Continue to work in a Lua project is not that difficult.
All you have to do to reload a file is to run "dofile" instead of
"require" on the file. If you want to reload all your files, just clear
the require cache
package.loaded = {}
and run your startup file again. You also need to take some care when
writing your lua files so that they are "reentrant" and behave nicely
when reloaded, i.e., instead of writing your class definitions like this:
Car = {}
function Car:run()
...
end
Write:
Car = Car or {}
function Car:run()
...
end
Now if you reload the file, the old Car-class will be retained (so
objects keep the right metaclass), but the function definitions in the
Car class will be updated.
// Niklas