Path: utzoo!mnetor!uunet!cadnetix.COM!gad
From: gad@cadnetix.COM (Gordon Durand)
Newsgroups: comp.lang.c++
Subject: Strange behaviour with some OOPS SubStrings.
Message-ID: <2100@cadnetix.COM>
Date: 24 Feb 88 00:00:10 GMT
Organization: Cadnetix Corp., Boulder, CO
Lines: 44

I've run into an interesting problem when using OOPS Strings and
SubStrings, specifically the function SubString::operator==(const String&).
If I have a conditional which AND's two comparisons between strings and
substrings, I get the following:

	CC  -DBOTCH StringBotch.C -loops:
	...warning about a bitwise copy in String.h...
	cc  StringBotch..c -loops -lC
	"/usr/include/oops/String.h", line 42: redeclaration of _SubString__eq

If I break the AND into nested if statements, the problem goes away!
An example is included below, compiling with -DBOTCH causes problems.

Configuration info:	Sun 3/50 with SunOS 3.4, AT&T C++ 1.2.1,
			OOPS Version 2 (installation notes dated 4/13/87)

Is this a problem with OOPS, C++, or my feeble mind?

===================================================================
#include <oops/String.h>

main()
{
   String Line ("byebye");
   String Bye ("bye");
#ifdef BOTCH
   if (Line (0, 3) == Bye && Line (3, 3) == Bye) {	// This will break.
       printf ("Yup, Line was byebye\n");
   }
#else  BOTCH
   if (Line (0, 3) == Bye) {				// This is fine.
      if (Line (3, 3) == Bye) {
         printf ("Yup, Line was byebye\n");
      }
   }
#endif BOTCH
}
===================================================================

-- 
    Gordon Durand		Internet: gad@cadnetix.com
    Cadnetix Corp.		UUCP: cadnetix!gad
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