[LLVMbugs] [Bug 18192] New: accepting the wrong set of non-type template arguments for pointers to members

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18192

            Bug ID: 18192
           Summary: accepting the wrong set of non-type template arguments
                    for pointers to members
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: richard-llvm at metafoo.co.uk
                CC: david.majnemer at gmail.com, dgregor at apple.com,
                    llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Given:

  struct A { struct { int n; }; };
  template<int A::*> struct X {};

Clang rejects this valid code:

  X<&A::n> x;

Clang in C++11 mode accepts this invalid code:

  constexpr int A::*p = &A::n;
  X<p> x;

(Per 14.3.2/1 bullet 6 and 5.3.1/4, such a template argument must be of the
form & qualified-id.)

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