[LLVMbugs] [Bug 22088] New: Rejected specialization of variadic template template parameter

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22088

            Bug ID: 22088
           Summary: Rejected specialization of variadic template template
                    parameter
           Product: clang
           Version: 3.5
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: _ at adityaramesh.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13623
  --> http://llvm.org/bugs/attachment.cgi?id=13623&action=edit
Example of specialization that is erroneously rejected.

I believe that specialization of a variadic template template parameter based
on the number of template arguments is valid (see the attached code sample and
this SO question:
http://stackoverflow.com/questions/9772264/specializing-a-variadic-template-template-parameter-on-the-minimum-number-of-arg).
The sample attached successfully compiles under g++-4.8 but is rejected by
clang++-3.5.

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