[LLVMbugs] [Bug 18392] False positive: Clang warns about unhanded switch values even if they are handled elsewhere

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18392

Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |richard-llvm at metafoo.co.uk
         Resolution|---                         |WONTFIX

--- Comment #1 from Richard Smith <richard-llvm at metafoo.co.uk> ---
Sorry, it's not feasible for us to fix this; this would require significant
flow analysis that is beyond the scope of what we want to do in the compiler
frontend. If you want this level of sophistication, the clang static analyzer
might work for you.

You can work around this with something like:

  switch( value )
  {
      case AnEnumA: __builtin_unreachable(); // handled above
      case AnEnumB: // ...

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