Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!hplabs!hpcc01!hpcuhb!hpcllla!hpclisp!hpclscu!shankar
From: shankar@hpclscu.HP.COM (Shankar Unni)
Newsgroups: comp.lang.c++
Subject: cfront 2.* mishandles "if (funcname)" statement
Message-ID: <58170025@hpclscu.HP.COM>
Date: 5 Jun 90 19:29:47 GMT
Organization: Hewlett-Packard Calif. Language Lab
Lines: 33

Looks like cfront has a hard time dealing with function pointers in
conditional expressions. For instance:

   extern int foo();
   main()
   {
       if (foo) {
          /* ... */
       }
   }
   
   "foo.c", line 4: function != zero

Similar messages are put out when the function is used in other conditional
contexts.

The workaround seems to be to specify

   if (&foo) {
   }

From my reading of section 4.6 of the 2.0 (and 2.1) reference manuals
("Pointer conversions"),  the expression "foo" should get a type of
"pointer to function" (since I am neither calling it, nor applying an "&"
operator to it).

Is this a cfront bug, or am I missing something? Cfront even seems to be
going out of its way to put out this message...

-----
Shankar Unni                                   E-Mail: 
Hewlett-Packard California Language Lab.     Internet: shankar@hpda.hp.com
Phone : (408) 447-5797                           UUCP: ...!hplabs!hpda!shankar