Completion is enabled by default (to disable it, use M-x customize-variable RET erc-modules).
You can complete on all channel members using TAB.
There are two modules to achieve this:
Use the old style only if you do not have pcomplete on your system.
Completion also works with ErcCommands.
Enabled by default.
Old style completion had a feature that was never used: You could reduce completion to you pals only (maybe this was supposed to be useful on very full channels such as #debian). In order to use it, set the variable
You can set it to either ‘all, ‘pals, or a function named
‘erc-nick-completion-exclude-myself’ to determine what the list of possible completions look like. Of course you can also write your own function to provide a list of possible completions. This is no longer supported in the new-style completion.