idlwave: Object Method Completion in the Shell

 
 4.4.3 Object Method Completion in the Shell
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 In the IDLWAVE Shell (SeeThe IDLWAVE Shell), objects on which
 methods are being invoked have a special property: they must exist as
 variables, and so their class can be determined (for instance, using the
 ‘obj_class()’ function).  In the Shell, when attempting completion,
 routine info, or online help within a method routine, a query is sent to
 determine the class of the object.  If this query is successful, the
 class found will be used to select appropriate completions, routine
 info, or help.  If unsuccessful, information from all known classes will
 be used (as in the buffer).