[LLVMbugs] [Bug 22290] New: Consider a warning for alignment specifiers on underlying types of enums

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22290

            Bug ID: 22290
           Summary: Consider a warning for alignment specifiers on
                    underlying types of enums
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: llvm-bugs at justinbogner.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Alignment is not a property of types, and as of r226653 code like the following
does the right thing by ignoring the aligned(64) attribute for X:

  typedef int __attribute__((aligned(64))) N;
  enum X : N {} x;

It's not clear when it makes sense to write this code as above, but it seems
quite likely that the programmer is confused. We should consider warning that
the alignment attribute doesn't propagate to the enum if we see this.

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