[LLVMbugs] [Bug 6620] New: Unnamed namespace problem

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=6620

           Summary: Unnamed namespace problem
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: chris at bubblescope.net
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


Created an attachment (id=4522)
 --> (http://llvm.org/bugs/attachment.cgi?id=4522)
unnamed namespace example

The attached code compiles in g++, but not in clang++.

Note that the following does compile, where we do not close and reopen the
numeric namespace.

This blocks boost::accumulate.

    namespace numeric {
        namespace op {
            struct greater {};
        }
        namespace {
            extern op::greater const greater;
        }

        namespace {
            op::greater const greater = op::greater();
        }

            template<typename T, typename U>
            int f(T& l, U& r)
            { numeric::greater(l, r); }

    }

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