Data formatter candidate matches can be generated in a number of ways; language-based dynamic type discovery being one of them (for instance, this is what takes an 'id' and discovers that it truly is an __NSArrayI, so it should probably use the NSArray formatter)

This used to be hardcoded in the FormatManager, but in a pluginized world that is not the right way to go

So, move this step to the Language plugin such that appropriate language plugins for a type get a say about adding candidates to the formatters lookup tables

llvm-svn: 247112
diff --git a/lldb/source/Plugins/Language/ObjC/ObjCLanguage.h b/lldb/source/Plugins/Language/ObjC/ObjCLanguage.h
index 9c69fbf..3850c21 100644
--- a/lldb/source/Plugins/Language/ObjC/ObjCLanguage.h
+++ b/lldb/source/Plugins/Language/ObjC/ObjCLanguage.h
@@ -135,11 +135,14 @@
     ObjCLanguage () = default;
     
     lldb::LanguageType
-    GetLanguageType () const
+    GetLanguageType () const override
     {
         return lldb::eLanguageTypeObjC;
     }
     
+    std::vector<ConstString>
+    GetPossibleFormattersMatches (ValueObject& valobj, lldb::DynamicValueType use_dynamic) override;
+    
     //------------------------------------------------------------------
     // Static Functions
     //------------------------------------------------------------------
@@ -183,10 +186,10 @@
     // PluginInterface protocol
     //------------------------------------------------------------------
     virtual ConstString
-    GetPluginName();
+    GetPluginName() override;
     
     virtual uint32_t
-    GetPluginVersion();
+    GetPluginVersion() override;
 };
     
 } // namespace lldb_private