c++/3870: gcc 3.0 bogus error specializing a template function

[sebor at roguewave dot com]

>Number:         3870
>Category:       c++
>Synopsis:       gcc 3.0 bogus error specializing a template function
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jul 29 19:06:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     sebor@roguewave.com
>Release:        gcc version 3.0
>Organization:
>Environment:

>Description:
This fails with 3.0, but compiles fine with 2.95.2.

Regards
Martin


$ cat t.cpp ; /usr/local/gcc-3.0/bin/g++ -v t.cpp
template <class T>
struct A { typedef int I; };

template <class T>
inline typename T::I
foo (typename T::I, const T*);

template <>
int foo (int i, const A<long>*)
{
    return i + 1;
}
Reading specs from /usr/local/gcc-3.0/lib/gcc-lib/i686-pc-linux-gnu/3.0/specs
Configured with: ../gcc-3.0/configure --prefix=/usr/local/gcc-3.0 --enable-shared
Thread model: single
gcc version 3.0
 /usr/local/gcc-3.0/lib/gcc-lib/i686-pc-linux-gnu/3.0/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=0 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -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_i686__ -D__tune_pentiumpro__ t.cpp -D__GNUG__=3 -D__GXX_DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase t.cpp -version -o /tmp/ccb7UqUs.s
GNU CPP version 3.0 (cpplib) (i386 Linux/ELF)
GNU C++ version 3.0 (i686-pc-linux-gnu)
        compiled by GNU C version 2.95.2 19991024 (release).
ignoring nonexistent directory "/usr/local/gcc-3.0/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/gcc-3.0/include/g++-v3
 /usr/local/gcc-3.0/include/g++-v3/i686-pc-linux-gnu
 /usr/local/gcc-3.0/include/g++-v3/backward
 /usr/local/gcc-3.0/include
 /usr/local/gcc-3.0/lib/gcc-lib/i686-pc-linux-gnu/3.0/include
 /usr/include
End of search list.
t.cpp: In function `typename T::I foo(typename T::I, const T*) [with T = A<long 
   int>]':
t.cpp:11: `i' undeclared (first use this function)
t.cpp:11: (Each undeclared identifier is reported only once for each function 
   it appears in.)
>How-To-Repeat:
template <class T>
struct A { typedef int I; };

template <class T>
inline typename T::I
foo (typename T::I, const T*);

template <>
int foo (int i, const A<long>*)
{
    return i + 1;
}
>Fix:

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