http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56611
Bug #: 56611
Summary: [C++11] Template instanciation failure with variadic
arguments and template aliases
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: antoine...@gmail.com
The attached code fails to compile because of failed template instanciation /
type matching, but seems correct, compiles with clang, and can be made to
compile with gcc with minor modifications (see code comments).
Problem statement:
R<Func(int, int)> need result2<int, int> but the compiler does not seem able to
instanciate result2<int, int>. If result2<int, int> is explicitly instanciated,
the code compiles. Also if template alias result2 is replaced with a typedef in
a class (result1) the code compiles.
______________________
gcc 4.7.2 configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.7.2-2ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs
--enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.7 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
