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idlwave: Structure Tag Completion

 
 4.4.5 Structure Tag Completion
 ------------------------------
 
 In many programs, especially those involving widgets, large structures
 (e.g., the ‘state’ structure) are used to communicate among routines.
 It is very convenient to be able to complete structure tags, in the same
 way as for instance variables (tags) of the ‘self’ object (Object
 Method Completion and Class Ambiguity).  Add-in code for structure tag
 completion is available in the form of a loadable completion module:
 ‘idlw-complete-structtag.el’.  Tag completion in structures is highly
 ambiguous (much more so than ‘self’ completion), so
 ‘idlw-complete-structtag’ makes an unusual and very specific assumption:
 the exact same variable name is used to refer to the structure in all
 parts of the program.  This is entirely unenforced by the IDL language,
 but is a typical convention.  If you consistently refer to the same
 structure with the same variable name (e.g., ‘state’), structure tags
 which are read from its definition in the same file can be used for
 completion.
 
    Structure tag completion is not enabled by default.  To enable it,
 simply add the following to your ‘.emacs’:
 
         (add-hook 'idlwave-load-hook
                   (lambda () (require 'idlw-complete-structtag)))
 
    Once enabled, you’ll also be able to access online help on the
 structure tags, using the usual methods (Online Help).  In
 addition, structure variables in the shell will be queried for tag
 names, similar to the way object variables in the shell are queried for
 method names.  So, e.g.:
 
      IDL> st.[Tab]
 
 will complete with all structure fields of the structure ‘st’.
 

Info Catalog idlwave: Class and Keyword Inheritance idlwave: Completion