Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!labrea!mcnc!rti!xyzzy!bert!coleman
From: coleman@bert.dg.com (Kim Coleman)
Newsgroups: gnu.g++.bug
Subject: g++ 1.34.1 bug
Summary: func call default parameters
Keywords: default parameters
Message-ID: <4769@xyzzy.UUCP>
Date: 3 Apr 89 21:57:33 GMT
Sender: usenet@xyzzy.UUCP
Reply-To: coleman@bert.dg.com (Kim Coleman)
Distribution: gnu
Organization: Data General Corporation, Research Triangle Park, NC.
Lines: 40


//  Bug with function call parameters in g++ 1.34.1
//
//  Declaring a class method with a function call default parameter seems to
//  cause subsequent confusion when compiling the completion of the method.
//  In the program below, the compiler will hang if there are errors in the
//  body of annoying::problem. I've hung it with syntax errors, semantic
//  errors, and warnings (in particular, assignment of a constant pointer to
//  a non-constant pointer). Related error messages are not printed out.
//  Only a default parameter value that is a function call seems to provoke
//  this behavior. As long as you write perfect programs, all is well! :-)
//
//  Older revs of the compiler (pre-1.34) hung up whether or not there were
//  errors (or even statements) in the function body.
//

int foo();

class annoying
{
  public:
     void  problem( int  position = foo() );
};


void annoying::problem( int position )
{
   int i;
   i = unknown;                // will cause compiler to hang

   i=;                         // so will this

   int* p;
   const int* cp;
   p = cp;                     // and this
}

----------------------
Kim Coleman
Data General Corp., Research Triangle Park, NC
{the world}!mcnc!rti!dg-rtp!coleman