Change AddressClass type from 'enum' to 'enum class'.

If we have a function with signature f(addr_t, AddressClass), it is easy to muddle up the order of arguments without any warnings from compiler. 'enum class' prevents passing integer in place of AddressClass and vice versa.

llvm-svn: 335599

lldb/source/API/SBFrame.cpp

@@ -419,7 +419,7 @@ addr_t SBFrame::GetPC() const {
       frame = exe_ctx.GetFramePtr();
       if (frame) {
         addr = frame->GetFrameCodeAddress().GetOpcodeLoadAddress(
-            target, eAddressClassCode);
+            target, AddressClass::eCode);
       } else {
         if (log)
           log->Printf("SBFrame::GetPC () => error: could not reconstruct frame "