list <T>::iterator _it ; fails to compile

[Arnaud Gardelein <arnaud dot gardelein at polytech dot univ-nantes dot fr>]

Hello !

  It seems that when I try to create a list iterator in a template class
with "list<T>::iterator _it ;", gcc-3.4.0 does not like that, whereas
version 3.2.2 does (compilation details follows) :

gcc-3.4.0 :
test.cpp:9: error: expected `;' before "_it"

gcc-3.2.2 :
test.cpp:9: warning: `typename std::list<T, std::allocator<_CharT>
>::iterator' is implicitly a typename
test.cpp:9: warning: implicit typename is deprecated, please see the
documentation for details

  What's wrong ?

   Arnaud.

---------------------------------- Details
Here is the sample code :

#include <iostream>
#include <list>

using namespace std ;

template <class T> class Myclass
{
  list<T> _l ;
  list<T>::iterator _it ; // Here is the problem
 public :
  void f(void) { cout << "In Myclass::f()" << endl ; }
} ;

int main(void)
{
  Myclass <int> a ;
  a.f() ;
  cout << "Yo !" << endl ;
}

******************************** Compiling with gcc-3.2.2
Reading specs from
/usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/specs
Configured with: ../configure --prefix=/usr --libdir=/usr/lib
--with-slibdir=/lib --mandir=/usr/share/man --infodir=/usr/share/info
--enable-shared --enable-threads=posix --disable-checking
--enable-long-long --enable-__cxa_atexit
--enable-languages=c,c++,ada,f77,objc,java
--host=i586-mandrake-linux-gnu --with-system-zlib
Thread model: posix
gcc version 3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk)
 /usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/cc1plus -v
-iprefix /usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/
-D__GNUC__=3 -D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=2
-D__GXX_ABI_VERSION=102 -D__ELF__ -Dunix -D__gnu_linux__ -Dlinux
-D__ELF__ -D__unix__ -D__gnu_linux__ -D__linux__ -D__unix -D__linux
-Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE
-Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i586__
-D__tune_pentium__ test.cpp -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS
-quiet -dumpbase test.cpp -version -o /tmp/cc8hj8Qh.s
GNU CPP version 3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk) (cpplib) (i386
Linux/ELF)
GNU C++ version 3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk)
(i586-mandrake-linux-gnu)
	compiled by GNU C version 3.2.2 (Mandrake Linux 9.1 3.2.2-3mdk).
ignoring nonexistent directory "/usr/i586-mandrake-linux-gnu/include"
ignoring nonexistent directory "/usr/i586-mandrake-linux-gnu/include"
ignoring duplicate directory "/usr/include/c++/3.2.2"
ignoring duplicate directory
"/usr/include/c++/3.2.2/i586-mandrake-linux-gnu"
ignoring duplicate directory "/usr/include/c++/3.2.2/backward"
ignoring duplicate directory
"/usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/3.2.2
 /usr/include/c++/3.2.2/i586-mandrake-linux-gnu
 /usr/include/c++/3.2.2/backward
 /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/include
 /usr/local/include
 /usr/include
End of search list.
test.cpp:9: warning: `typename std::list<T, std::allocator<_CharT>
>::iterator' is implicitly a typename
test.cpp:9: warning: implicit typename is deprecated, please see the
documentation for details
test.cpp:19:2: warning: no newline at end of file
 as -V -Qy -o /tmp/cc4eIMmz.o /tmp/cc8hj8Qh.s
GNU assembler version 2.13.90.0.18 (i586-mandrake-linux-gnu) using BFD
version 2.13.90.0.18 20030121
 /usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/collect2
--eh-frame-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o test
/usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/../../../crt1.o
/usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/../../../crti.o
/usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/crtbegin.o
-L/usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2
-L/usr//bin/../lib/gcc-lib
-L/usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2
-L/usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/../../..
-L/usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/../../..
/tmp/cc4eIMmz.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc
/usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/crtend.o
/usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.2.2/../../../crtn.o
***************************

*************************** Compiling with gcc-3.4.0
Reading specs from /usr/lib/gcc/i586-mandrake-linux-gnu/3.4.0/specs
Configured with: ../configure --prefix=/usr --libdir=/usr/lib
--with-slibdir=/lib --mandir=/usr/share/man --infodir=/usr/share/info
--enable-shared --enable-threads=posix --disable-checking
--enable-long-long --enable-__cxa_atexit --enable-clocale=gnu
--disable-libunwind-exceptions --enable-languages=c,c++,java
--program-suffix=-3.4.0 --host=i586-mandrake-linux-gnu
--with-system-zlib
Thread model: posix
gcc version 3.4.0 (Mandrake Linux 10.0 3.4.0-0.4mdk)
 /usr/lib/gcc/i586-mandrake-linux-gnu/3.4.0/cc1plus -quiet -v
-D_GNU_SOURCE test.cpp -quiet -dumpbase test.cpp -mtune=pentium -auxbase
test -version -o /home/agardelein/tmp/ccISxNkl.s
ignoring nonexistent directory
"/usr/lib/gcc/i586-mandrake-linux-gnu/3.4.0/../../../../i586-mandrake-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:

/usr/lib/gcc/i586-mandrake-linux-gnu/3.4.0/../../../../include/c++/3.4.0

/usr/lib/gcc/i586-mandrake-linux-gnu/3.4.0/../../../../include/c++/3.4.0/i586-mandrake-linux-gnu

/usr/lib/gcc/i586-mandrake-linux-gnu/3.4.0/../../../../include/c++/3.4.0/backward
 /usr/local/include
 /usr/lib/gcc/i586-mandrake-linux-gnu/3.4.0/include
 /usr/include
End of search list.
GNU C++ version 3.4.0 (Mandrake Linux 10.0 3.4.0-0.4mdk)
(i586-mandrake-linux-gnu)
        compiled by GNU C version 3.4.0 (Mandrake Linux 10.0
3.4.0-0.4mdk).
GGC heuristics: --param ggc-min-expand=47 --param ggc-min-heapsize=32018
test.cpp:9: error: expected `;' before "_it"
***************************