http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53858
Bug #: 53858
Summary: template aliases used in template parameters default
expression
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: leo...@volnitsky.com
gcc-4.8 compile error when template aliases used in template parameters default
expression. There was no error with gcc-4.7.1
---------------------------------------------------------------
template <typename T> struct s0 { typedef T tdef0; };
template <typename T> struct s1 { typedef T tdef1; };
template <typename T> using us1 = typename s1<T>::tdef1;
template <typename T, typename TT = typename us1<T>::tdef0> struct s2 {};
int main () { return 0; }
------------------------------------------------------------------
g++ -std=gnu++11 t.cc
t.cc:4:49: error: expected nested-name-specifier
template <typename T, typename TT = typename us1<T>::tdef0> struct s2 {};
^
t.cc:4:49: error: expected ‘>’
gcc -v
Using built-in specs.
COLLECT_GCC=/usr/x86_64-pc-linux-gnu/gcc-bin/4.8.0-pre9999/gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/4.8.0-pre9999/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-4.8.0_pre9999/work/gcc-4.8.0-9999/configure
--prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.8.0-pre9999
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0-pre9999/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.8.0-pre9999
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.8.0-pre9999/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.8.0-pre9999/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0-pre9999/include/g++-v4
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec
--disable-fixed-point --with-ppl --with-cloog --disable-ppl-version-check
--with-cloog-include=/usr/include/cloog-ppl --enable-lto --enable-nls
--without-included-gettext --with-system-zlib --enable-obsolete
--disable-werror --enable-secureplt --enable-multilib
--with-multilib-list=m32,m64 --enable-libmudflap --disable-libssp
--enable-libgomp
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.8.0-pre9999/python
--enable-checking=release --disable-libgcj --enable-languages=c,c++,go,fortran
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --enable-targets=all --with-bugurl=http://bugs.gentoo.org/
--with-pkgversion='Gentoo 4.8.0_pre9999'
Thread model: posix
gcc version 4.8.0-pre9999 20120704 (experimental) commit
3d02dd733723c41be7c56f814a3072cee1b43ecc (Gentoo 4.8.0_pre9999)
-------------------------------------------------------------------
