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I have set wildmenu and set wildmode=list,full in my .vimrc.

If I go to enter a command such as buf or tabe, follow it with a space, and then hit tab, my wildmenu options take effect as I'd expect, but for some commands, such as open, I can't tab complete afterwards. Instead ^I characters are added.

Why can't I tab complete after open?

  • And what you expect to be completed? – Alex Kroll Aug 13 '15 at 23:18
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    I would presume file names like when doing tabe or buf – SnoringFrog Aug 14 '15 at 4:57
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    open has only one argument :open /pattern/ (see :help open) and no complete options. For file completion you must define your own command, something like this :command -complete=file -nargs=1 Open open <args> see :help command. You can define custom function completion. Or use :edit command instead. – Alex Kroll Aug 14 '15 at 8:21
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    Also see: What does :open do in vim?. – Martin Tournoij Aug 14 '15 at 10:49
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    @Alex I think your comment should be an answer (especially the -complete argument in command creation is pretty nice to know about) – statox Aug 14 '15 at 14:12
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First of all you should understand What does :open do in vim? (thanks @Carpetsmoker for link)

open has only one argument :open /pattern/ (see :help open and link above) and no complete options.

For file names completion you should define your own command, something like this

:command -complete=file -nargs=1 Open open <args>

Pay attention to -complete= argument it may take some value listed in documentation and including file , file_in_path, buffer etc. and finally custom function.

-nargs=1 indicate that you command can take only one arument

See :help command for full explanation and examples.

Now you can type :Open and then press Tab

Or just use :edit command instead, it has completion option like as a buffer and tabe commands.

  • Did not realize open operated that way. Guess I'll have to get myself to start using edit (or just buffer and tabe, I suppose), or fallback to a custom command if I can't make the mental switch lol. – SnoringFrog Aug 14 '15 at 18:31

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