------- Comment #1 from pinskia at gmail dot com 2010-06-16 17:04 -------
Subject: Re: New: you can't use a typedef from a typename scope in a template
On Jun 16, 2010, at 9:57 AM, "gcc at razorcam dot com"
<gcc-bugzi...@gcc.gnu.org
> wrote:
> You can't use a typedef from a typename scope in a template
> This is obviously a major bug and it means you can't access the
> typedefs of the
> ISO standard library containers in order to use safe types to
> manipulate those
> containers, when typename is such a container.
>
> Here is the output of the command g++ bug_report_typedef.cc
> bug_report_typedef.cc: In function âvoid f(T)â:
> bug_report_typedef.cc:3: error: expected â;â before âiâ
> g++ -v follows the source code of bug_report_typedef.cc
>
> template <typename T>
> void f(T t){
> T::type i;
You are missing the keyword typename. The standard requires this
keyword on dependent names because it could be either a variable or a
type. The standard assumes a variable name without the keyword.
> }
>
> g++ -v bug_report_typedef.cc
> Using built-in specs.
> Target: x86_64-linux-gnu
> Configured with: ../src/configure -v --with-pkgversion='Debian
> 4.4.4-3'
> --with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs
> --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-
> shared
> --enable-multiarch --enable-linker-build-id --with-system-zlib
> --libexecdir=/usr/lib --without-included-gettext --enable-
> threads=posix
> --with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 --
> enable-nls
> --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc
> --with-arch-32=i486 --with-tune=generic --enable-checking=release
> --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-
> linux-gnu
> Thread model: posix
> gcc version 4.4.4 (Debian 4.4.4-3)
> COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic'
> /usr/lib/gcc/x86_64-linux-gnu/4.4.4/cc1plus -quiet -v -D_GNU_SOURCE
> bug_report_typedef.cc -quiet -dumpbase bug_report_typedef.cc -
> mtune=generic
> -auxbase bug_report_typedef -version -o /tmp/ccgt4Dk8.s
> GNU C++ (Debian 4.4.4-3) version 4.4.4 (x86_64-linux-gnu)
> compiled by GNU C version 4.4.4, GMP version 4.3.2, MPFR
> version
> 2.4.2-p1.
> GGC heuristics: --param ggc-min-expand=57 --param ggc-min-
> heapsize=51739
> ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
> ignoring nonexistent directory
> "/usr/lib/gcc/x86_64-linux-gnu/4.4.4/../../../../x86_64-linux-gnu/
> include"
> ignoring nonexistent directory "/usr/include/x86_64-linux-gnu"
> #include "..." search starts here:
> #include <...> search starts here:
> /usr/include/c++/4.4
> /usr/include/c++/4.4/x86_64-linux-gnu
> /usr/include/c++/4.4/backward
> /usr/local/include
> /usr/lib/gcc/x86_64-linux-gnu/4.4.4/include
> /usr/lib/gcc/x86_64-linux-gnu/4.4.4/include-fixed
> /usr/include
> End of search list.
> GNU C++ (Debian 4.4.4-3) version 4.4.4 (x86_64-linux-gnu)
> compiled by GNU C version 4.4.4, GMP version 4.3.2, MPFR
> version
> 2.4.2-p1.
> GGC heuristics: --param ggc-min-expand=57 --param ggc-min-
> heapsize=51739
> Compiler executable checksum: a92c574e76687c18572fdbea97434cec
> bug_report_typedef.cc: In function âvoid f(T)â:
> bug_report_typedef.cc:3: error: expected â;â before âiâ
>
>
> --
> Summary: you can't use a typedef from a typename scope in a
> template
> Product: gcc
> Version: 4.4.4
> Status: UNCONFIRMED
> Severity: major
> Priority: P3
> Component: c++
> AssignedTo: unassigned at gcc dot gnu dot org
> ReportedBy: gcc at razorcam dot com
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44559
>
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44559
