When a datum is quoted, nothing within is evaluated. For example:
evaluates to the value bound to the identifier
evaluates to the symbol
(+ 1 2 3)
evaluates to 6, whereas
'(+ 1 2 3)
(quote (+ 1 2 3))
evaluate to a list with four elements: the symbol
+, and the numbers 1, 2, and 3. In particular, the
+is not evaluated.
mode, both being within the quoted datum, are not treated as identifiers, but as symbols. They are not evaluated.
Look at C-h v ibuffer-saved-filter-groups. It explains about this variables further. It is an alist variable. According to documents, it should look like ((“STRING” QUALIFIERS) (“STRING” QUALIFIERS) …) Now QUALIFIERS is a LIST of the same form as `ibuffer-filtering-qualifiers’. It is a LIST like (SYMBOL . QUALIFIER).
Originally posted 2013-08-31 05:20:15.