c++/358: Re: C++ bug, appearantly template related.

["Martin v. Loewis" <martin at loewis dot home dot cs dot tu-berlin dot de>]

>Number:         358
>Category:       c++
>Synopsis:       C++ bug, appearantly template related.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          analyzed
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Wed Jun 28 13:56:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     nisse@lysator.liu.se (Niels Möller)
>Release:        2.95.2
>Organization:
>Environment:
>Description:
 Date: 28 Jun 2000 12:02:57 +0200
 Original-Message-ID: <nnituuunqm.fsf@sture.lysator.liu.se>
 Lines: 94

 I've stumbled on an Internal compiler error in gcc.

 I use gcc-2.95.2 (built with ./configure --enable-cpplib && make
 bootstrap, but I don't think that matters).

 My system, according to uname: "Linux katt.streamserve.com 2.2.5-15 #1
 Mon Apr 19 23:00:46 EDT 1999 i686 unknown".

 I try compiling the C++ file below by saying "gcc -c bug.cxx", and gcc
 fails with

   bug.cxx:68: Internal compiler error.
   bug.cxx:68: Please submit a full bug report.
   bug.cxx:68: See <URL:http://www.gnu.org/software/gcc/faq.html#bugreport> for instructions.

 Source file appended below. I'm not sure if it is really valid C++, as
 gcc dies before I get any useful error messages.

 Regards,
 /Niels
>How-To-Repeat:
/* xslt_hashtable.h */

class xslt_hash_table;
class xslt_hash_entry;

class xslt_hash_table
{
public:
  class iterator;
  friend iterator;
protected:
  xslt_hash_table();
  
  virtual ~xslt_hash_table() = 0;
};

class xslt_hash_entry
{
  friend xslt_hash_table;
  friend xslt_hash_table::iterator;
  
protected:
  xslt_hash_entry *m_next;
  unsigned m_hash;

  xslt_hash_entry(unsigned hash)
    : m_hash(hash) {}
  virtual ~xslt_hash_entry() = 0;
};

class xslt_hash_table::iterator
{
  xslt_hash_table *m_ht;
  unsigned m_i;
  xslt_hash_entry *m_p;
  
public:
  iterator(xslt_hash_table *ht)
    : m_ht(ht), m_i(0), m_p(0) {};
  xslt_hash_entry *next();
};


/* xslt_stylesheet.h */

class XSLName;

template <class V>
class XSLHashTable : xslt_hash_table
{
public:
  struct XSLAssoc : xslt_hash_entry
    {
    /* NOTE: Doesn't own either names or values */
    XSLName *m_name;
    V *m_value;

    XSLAssoc(XSLName *name, V *value)
      : m_name(name), m_value(value)
      , xslt_hash_entry(name->Hash())
      {}
  };
  class iterator;
  friend iterator;
};

template<class V>
class XSLHashTable<V>::iterator : xslt_hash_table::iterator
{
public:
  iterator(XSLHashTable<V> *ht) : xslt_hash_table::iterator(ht) {}
  V* next() { return (V*) xslt_hash_table::iterator::next(); }
};

>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: