http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58707
Bug ID: 58707 Summary: [C++11] A greater-than operator in square brackets should not end a template argument list Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: minor Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: tuomas.tynkkynen at iki dot fi Created attachment 30993 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30993&action=edit The failing code snippet The following code snippet does not compile on latest GCC trunk: template<int i> class TC { }; constexpr int foo[] = { 42, }; TC<foo[0 > 1]> bar; Actual result: tmtynkky@e42-7:/tmp$ /dos/gcc-trunk/bin/gcc -xc++ -std=c++11 -pedantic -c -o /dev/null bracket.cpp bracket.cpp:3:10: error: template argument 1 is invalid TC<foo[0 > 1]> bar; ^ bracket.cpp:3:12: error: expected unqualified-id before numeric constant TC<foo[0 > 1]> bar; ^ The '>' seems to get parsed as the ending delimiter of the template argument list, even though it shouldn't since it is nested inside a pair of square brackets. Clang++ 3.3 correctly accepts this snippet. (originally discussed on http://forum.cppgm.org/question/2286/inside-square-brackets-terminates-a-template-argument-list/) Version information: gcc version 4.9.0 20131011 (experimental) [trunk revision 203401] (GCC) Target: x86_64-unknown-linux-gnu Configured with: ../gcc-trunk-source/gcc/configure --enable languages=c,c++,fortran --enable-checking=release --disable-libmudflap --disable libstdcxx-pch --enable-libgomp --enable-lto --enable-gold --with-plugin ld=/usr/bin/gold --with-cloog-include=/usr/include-cloog --with-cloog lib=/usr/lib64 --prefix=/usr/local/gcc-trunk