Good langauge references for Macros / LUA

Gnarf if you are just starting out my first piece of advice would be to pick up the book world of warcraft programming. This has the best reference/tutorial/examples I have seen so far. Another great source of information is from wowwiki. If you search for lua commands it has pages listing most of the method calls and their purposes. Along with this there are links to even more useful sights and tools.

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Best site for finfo for macros, since Cogwheel told Blizzard to stuff themselves.

The two best sites for information about LUA and Macros are these.

1) LUA-Users.org: Tutorials

2) WoWProgramming Docs

Those are general language references for the WoW API and LUA. It would be pretty annoying and hard to code up formatting for all API commands in general. Here's two more resources that I think directly answer what you were asking.

1) WoWWiki List of Slash Commans

2) WoWWiki Macro Conditionals

The first is a list of slash commands in WoW. These are the exhaustive list of the valid slash commands the in-game API recognizes.

The second is a list of all the conditions that go inside the [ ] boxes for relevant slash commands.

I believe that is what you asked about, if you want additional references I would suggest looking at the mod WoWLua and seeing the general way that it formats WoW code in game. It's very basic but provides good formatting. If you reverse engineer it's code prettifying routine, you can probably co-opt that here.

WoWLua Mod: http://www.wowinterface.com/downloads/info7366-WowLua.html