http://llvm.org/bugs/show_bug.cgi?id=22370

            Bug ID: 22370
           Summary: Conversion to T&& via user-defined conversion to const
                    T rejected
           Product: clang
           Version: 3.5
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected], [email protected]
    Classification: Unclassified

Created attachment 13748
  --> http://llvm.org/bugs/attachment.cgi?id=13748&action=edit
"no

Clang (on all versions I tried) rejects this, which according to the C++11
standard is legal code: 'obj' is not reference-compatible with 'const obj', and
so according to 8.5.3 ref should bind to a temporary initialized using the
rules for copy-initialization.

This rejection can break some constructs that are accepted in C++03, but where
the C++11 library added extra overloads for T&&.

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