[LLVMbugs] [Bug 21119] New: [RFE] Provide warning for C++ class without anchor method

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Oct 1 12:18:57 PDT 2014


            Bug ID: 21119
           Summary: [RFE] Provide warning for C++ class without anchor
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: daniel at zuster.org
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

LLVM's style guide requires classes with vtables to have an out-of-line anchor
method (even it requires defining an unused synthetic one).

It would be nice if Clang had a warning to identify C++ classes without a
vtable anchor. To reduce noise, it might make sense to limit this to classes
with at least one out-of-line method, and then only fire the diagnostic when an
implementation of that method is seen.

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