When completion is done on file names, certain file names are usually
ignored. The variable completion-ignored-extensions contains a
list of strings; a file whose name ends in any of those strings is
ignored as a possible completion. The standard value of this variable
has several elements including ".o", ".elc", ".dvi"
and "~". The effect is that, for example, `foo' can
complete to `foo.c' even though `foo.o' exists as well.
However, if all the possible completions end in "ignored"
strings, then they are not ignored. Ignored extensions do not apply to
lists of completions--those always mention all possible completions.
Normally, a completion command that finds the next character is undetermined
automatically displays a list of all possible completions. If the variable
completion-auto-help is set to nil, this does not happen,
and you must type ? to display the possible completions.
The complete library implements a more powerful kind of
completion that can complete multiple words at a time. For example, it
can complete the command name abbreviation p-b into
print-buffer, because no other command starts with two words
whose initials are `p' and `b'. To use this library, put
(load "complete") in your `~/.emacs' file (see section The Init File, `~/.emacs').
Icomplete mode presents a constantly-updated display that tells you what completions are available for the text you've entered so far. The command to enable or disable this minor mode is M-x icomplete-mode.
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