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whole-line-auto-completion.md

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Whole Line Auto-Completion

To get whole line auto-completion in Vim, you don't need a fancy plugin. It is built right in. There is a sub-mode of insert mode called X mode that allows you to do various kinds of special insertions. The ctrl-x ctrl-l binding corresponds to whole line completion. So, if you start typing a few characters and then (while still in insert mode) hit ctrl-x ctrl-l you will see a completed line that matches the initial characters you typed as well as a list of subsequent matches. You can cycle through the matches using ctrl-n and ctrl-p (going forward and backward, respectively).

The completion is done based on the configured completion sources. Generally, the completion sources will include the current buffer, other loaded and unloaded buffers, plus others. You can see which sources are configured with :set complete? and read more about the completion configuration at :h 'complete'.