Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!asuvax!noao!arizona!sunquest!francis
From: francis@sunquest.UUCP (Francis Sullivan)
Newsgroups: comp.lang.c++
Subject: warning message from Sun C++ 2.0
Message-ID: <1286@sunquest.UUCP>
Date: 19 Dec 89 17:34:57 GMT
Organization: Sunquest Information Systems, Tucson
Lines: 35

I have just started learning C++, and was experimenting with a string class for
practice.  Using g++ 1.34.2, I don't get warning messages with the following
program, but I do with Sun C++ 2.0.
 ############# file nstr.cc  ############
class Str {
  public:
    Str(Str&);
    Str(char *);
    Str();
    ~Str();
    Str& operator= (Str& s1);
    Str friend operator+ (Str& s1, Str& s2);
};
main (int argc, char *argv[]) {
    Str c;
    for (int i = 1; i < argc; i++)
	c = Str(argv[i]) + " " + c;
}
// eof of nstr.cc

now using Sun C++ 2.0
CC -g -c nstr.cc
CC  +g nstr.cc:
"nstr.cc", line 13: warning: temporary used for non-const Str & argument
"nstr.cc", line 13: warning: temporary used for non-const Str & argument
  ##########

The program works fine, but I want to be able to do operations like above
without getting the warning message.  Any solutions besides delaring temporary
strings for " " and the strings built from argv?
-- 
   Francis Sullivan		 Senior Programmer/Analyst
   Sunquest Information Systems Tucson, AZ
   email: francis@sunquest.com  or  sunquest!francis@arizona.edu  or
	  {uunet,arizona}!sunquest!francis