Use bit vectors to store the preprocessor's state.

src/libs/cplusplus/pp-engine.cpp

@@ -545,6 +545,8 @@ Preprocessor::Preprocessor(Client *client, Environment *env)
     : client(client),
       env(env),
       _expand(env),
+      _skipping(MAX_LEVEL),
+      _true_test(MAX_LEVEL),
       _result(0),
       _markGeneratedTokens(false),
       _expandMacros(true)

src/libs/cplusplus/pp-engine.h

@@ -54,6 +54,7 @@
 
 #include <Token.h>
 #include <QVector>
+#include <QBitArray>
 
 namespace CPlusPlus {
 
@@ -177,8 +178,8 @@ private:
     Environment *env;
     MacroExpander _expand;
 
-    bool _skipping[MAX_LEVEL]; // ### move in state
-    bool _true_test[MAX_LEVEL]; // ### move in state
+    QBitArray _skipping; // ### move in state
+    QBitArray _true_test; // ### move in state
     int iflevel; // ### move in state
 
     QList<State> _savedStates;