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From: "jarrydb at cse dot unsw.edu.au" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/49399] New: [C++0x] substitution failure error
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D49399

           Summary: [C++0x] substitution failure error
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jarrydb@cse.unsw.edu.au


Created attachment 24515
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=3D24515
substitution failure

When accessing a private member of a class in a substitution failure is not=
 an
error sort of way, the compiler reports an error.

Compiling the attached code gives the following:

g++ --std=3Dc++0x value_type.cpp
value_type.cpp: In function =E2=80=98int broken_fun(int, typename T::value_=
type*) [with
T =3D broken, typename T::value_type =3D int]=E2=80=99:
value_type.cpp:4:15: error: =E2=80=98typedef int broken::value_type=E2=80=
=99 is private
value_type.cpp:14:37: error: within this context

It works fine without c++0x mode, and on previous versions of gcc.

output of gcc -v

Using built-in specs.
COLLECT_GCC=3Dg++
COLLECT_LTO_WRAPPER=3D/home/jarryd/local/gcc-4.7/libexec/gcc/x86_64-unknown=
-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/jarryd/installers/gcc-svn/configure
--prefix=3D/home/jarryd/local/gcc-4.7 --disable-multilib
--enable-languages=3Dc,c++,go
Thread model: posix
gcc version 4.7.0 20110614 (experimental) (GCC)