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From: wjh+@ANDREW.CMU.EDU (Fred Hansen)
Newsgroups: comp.soft-sys.andrew
Subject: Re: calling textview_getdataobject in ness?
Message-ID: <oa8DG4u00VsP83uUc0@andrew.cmu.edu>
Date: 9 Apr 90 20:45:56 GMT
References: <8a64NT0B0KGWMBy0JY@holmes.parc.xerox.com>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 31

The following code caused a compilation error in the call to
textview_getdataobject:

Excerpts from internet.info-andrew: 2-Apr-90 calling
textview_getdataobj.. Bill Janssen@parc.xerox. (853+0)


>     --$enable class access

>     void function addstyle (object textview, marker stylename)
>         object text, style, stylesheet
>         integer selectionpos, selectionlen

>         selectionpos := textview_GetDotPosition(textview)
>         selectionlen := textview_GetDotLength(textview)
>         text := textview_getdataobject(textview)
>         stylesheet := text_GetStyleSheet(text)

The difficulty is that calls to methods and class variables are NOT
case-insensitive.  The proper call is 
	text := view_Getdataobject(textview)

with the uppercase G in "Get" and lower case d and o because that is how
the field name is declared in view.ch.  It is better to use view_
instead of textview_ because the declaration of dataobject is in view.ch.

With the wrong case, the Ness parser interpreted the call as a call on
an undefined function, so the type was assumed to be marker.  That is
why the type mismatch was flagged.

Fred Hansen