[Bug c++/11415] New: Error message with ::::

["bangerth at dealii dot org" <gcc-bugzilla at gcc dot gnu dot org>]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11415

           Summary: Error message with ::::
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bangerth at dealii dot org
                CC: gcc-bugs at gcc dot gnu dot org

This is more for everyone's amusement than an urgent bug report. This
code here
----------------------
template <typename> struct V {};
V< ::Outer::Inner > v;
----------------------
generates the funny error message

mortar/libmortar> c++ -c x.cc
x.cc:3: error: `::::Outer' is not a class-name or namespace-name
x.cc:3: error: `Inner' was not declared in this scope
x.cc:3: error: template argument 1 is invalid
x.cc:3: error: expected constructor, destructor, or type conversion

Note the duplicated :: operator. In a sense, this is even a regression,
since 3.3 gives the following message:

mortar/libmortar> ~/bin/gcc-3.3/bin/c++ -c x.cc
x.cc:3: error: `::Outer' undeclared (first use here)
x.cc:3: error: parse error before `::' token

However, I'm pretty sure there are more pressing cases for potential bug
fixers ;-)

W.