labath added inline comments.

================
Comment at: source/Core/RichManglingContext.cpp:133
+  case PluginCxxLanguage:
+    m_cxx_method_str = ConstString(
+        
get<CPlusPlusLanguage::MethodName>(m_cxx_method_parser)->GetBasename());
----------------
I thought we were going to get rid of this ConstString? The C++ plugin is able 
to provide the same (in fact, even stronger) lifetime guarantees as the IPD, so 
we could just have a single method that always returns a StringRef. (If you 
really want to, you can also have a ConstString-returning helper function, but 
it could be implemented the same way as it is now for IPD, so that both 
versions have the same runtime complexity.

I'd suggest having just a m_buffer StringRef object, which you set both here 
and in processIPDStrResult. Then `GetBufferRef()` can just return that object 
without any branching involved.


https://reviews.llvm.org/D50071



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