[LLVMbugs] [Bug 13706] New: lookup of nested-name-specifier in using-directive or namespace-alias-definition

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13706

             Bug #: 13706
           Summary: lookup of nested-name-specifier in using-directive or
                    namespace-alias-definition
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++11
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: vanyacpp at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


One of the last draft changed [basic.lookup.udir]p1 from

"When looking up a namespace-name in a using-directive or
namespace-alias-definition, only namespace names are considered."

to

"In a using-directive or namespace-alias-definition, during the lookup for a
namespace-name or for a name in a nested-name-specifier only namespace names
are considered."

It means that in C++11 the following code is valid:

namespace a
{
    struct a
    {};

    namespace b = a::a;
}

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