CppHighlighter: highlight macro references.

Change-Id: I7c90957aa67e03a109af0a722160d4e1c759d716
Reviewed-by: Leandro Melo <leandro.melo@nokia.com>

src/plugins/cpptools/cpptoolsreuse.cpp

@@ -40,6 +40,7 @@
 #include <QSet>
 #include <QTextDocument>
 #include <QTextCursor>
+#include <QStringRef>
 
 using namespace CPlusPlus;
 
@@ -131,5 +132,49 @@ bool isValidIdentifier(const QString &s)
     return true;
 }
 
+bool isQtKeyword(const QStringRef &text)
+{
+    switch (text.length()) {
+    case 4:
+        switch (text.at(0).toLatin1()) {
+        case 'e':
+            if (text == QLatin1String("emit"))
+                return true;
+            break;
+        case 'S':
+            if (text == QLatin1String("SLOT"))
+                return true;
+            break;
+        }
+        break;
+
+    case 5:
+        if (text.at(0) == QLatin1Char('s') && text == QLatin1String("slots"))
+            return true;
+        break;
+
+    case 6:
+        if (text.at(0) == QLatin1Char('S') && text == QLatin1String("SIGNAL"))
+            return true;
+        break;
+
+    case 7:
+        switch (text.at(0).toLatin1()) {
+        case 's':
+            if (text == QLatin1String("signals"))
+                return true;
+            break;
+        case 'f':
+            if (text == QLatin1String("foreach") || text ==  QLatin1String("forever"))
+                return true;
+            break;
+        }
+        break;
+
+    default:
+        break;
+    }
+    return false;
+}
 
 } // CppTools