This is essentially what hippie-expand does in Emacs, but it also checks other sources as well. Quoting EmacsWiki: "HippieExpand looks at the word before point

This is essentially what hippie-expand does in Emacs, but it also checks other sources as well. Quoting EmacsWiki: "HippieExpand looks at the word before point and tries to expand it in various ways including expanding from a fixed list (like `‘expand-abbrev’’), expanding from matching text found in a buffer (like `‘dabbrev-expand’’) or expanding in ways defined by your own functions. Which of these it tries and in what order is controlled by a configurable list of functions." http://www.emacswiki.org/cgi-bin/wiki/HippieExpand http://www.emacswiki.org/cgi-bin/wiki/HippieExpand