Clang: Add Declaration highlighting

We are adding declaration detection for function to the highligher on
user request. Other declaration will follow in separate patches.

Task-number: QTCREATORBUG-15564
Change-Id: I54e97c26425f8d6e9854547d50a9ac8fa076b4e8
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/libs/clangbackendipc/clangbackendipc_global.h

@@ -26,6 +26,8 @@
 #ifndef CLANGBACKENDIPC_GLOBAL_H
 #define CLANGBACKENDIPC_GLOBAL_H
 
+#include <utils/sizedarray.h>
+
 #include <QtCore/qglobal.h>
 
 #if defined(CLANGBACKENDIPC_BUILD_LIB)
@@ -51,7 +53,7 @@ enum class DiagnosticSeverity // one to one mapping of the clang enum numbers
     Fatal = 4
 };
 
-enum class HighlightingType
+enum class HighlightingType : quint8
 {
     Invalid,
     Keyword,
@@ -70,7 +72,8 @@ enum class HighlightingType
     PreprocessorDefinition,
     PreprocessorExpansion,
     Label,
-    OutputArgument
+    OutputArgument,
+    Declaration
 };
 
 enum class CompletionCorrection
@@ -123,5 +126,12 @@ struct MessageTrait<Message> \
     static const MessageType enumeration = MessageType::Message; \
 };
 
+using MixinHighlightingTypes = Utils::SizedArray<HighlightingType, 6>;
+
+struct HighlightingTypes {
+    HighlightingType mainHighlightingType;
+    MixinHighlightingTypes mixinHighlightingTypes;
+};
+
 }
 #endif // CLANGBACKENDIPC_GLOBAL_H