idlwave-completion-case

idlwave-completion-case is a variable defined in `idlwave.el'.
Its value is

((routine . upcase)
 (keyword . upcase)
 (class . preserve)
 (method . preserve))

Documentation:
Association list setting the case of completed words.

This variable determines the case (UPPER/lower/Capitalized...) of
words inserted into the buffer by completion. The preferred case can
be specified separately for routine names, keywords, classes and
methods.
This alist should therefore have entries for `routine' (normal
functions and procedures, i.e. non-methods), `keyword', `class', and
`method'. Plausible values are

upcase upcase whole word, like `BOX_CURSOR'
downcase downcase whole word, like `read_ppm'
capitalize capitalize each part, like `Widget_Control'
preserve preserve case as is, like `IDLgrView'

The value can also be any Emacs Lisp function which transforms the
case of characters in a string.

A value of `preserve' means that the case of the completed word is
identical to the way it was written in the definition statement of the
routine. This was implemented to allow for mixed-case completion, in
particular of object classes and methods.
If a completable word is defined in multiple locations, the meaning of
`preserve' is not unique since the different definitions might be
cased differently. Therefore IDLWAVE always takes the case of the
*first* definition it encounters during routine info collection and
uses the case derived from it consistently.

Note that a lowercase-only string in the buffer will always be completed in
lower case (but see the variable `idlwave-completion-force-default-case').

After changing this variable, you need to either restart Emacs or press
`C-u C-c C-i' to update the internal lists.

You can customize this variable.