preprocessor: make Preprocessor::preprocess private

Change-Id: Ic81e3ebec1b42ae0698a340ee7e1c711225c1162
Reviewed-by: hjk <qthjk@ovi.com>

src/libs/cplusplus/pp-engine.h

@@ -82,10 +82,6 @@ public:
     QByteArray operator()(const QString &filename, const QString &source);
     QByteArray operator()(const QString &filename, const QByteArray &source, bool noLines = false, bool markGeneratedTokens = true);
 
-    void preprocess(const QString &filename,
-                    const QByteArray &source,
-                    QByteArray *result, bool noLines, bool markGeneratedTokens, bool inCondition);
-
     bool expandMacros() const;
     void setExpandMacros(bool expandMacros);
 
@@ -93,6 +89,10 @@ public:
     void setKeepComments(bool keepComments);
 
 private:
+    void preprocess(const QString &filename,
+                    const QByteArray &source,
+                    QByteArray *result, bool noLines, bool markGeneratedTokens, bool inCondition);
+
     enum { MAX_LEVEL = 512 };
 
     struct State {

tests/auto/cplusplus/preprocessor/tst_preprocessor.cpp

@@ -204,8 +204,7 @@ public:
     {
         QByteArray src = loadSource(fileName);
         QVERIFY(!src.isEmpty());
-
-        m_pp.preprocess(fileName, src, m_output, nolines, true, false);
+        *m_output = m_pp(fileName, src, nolines, true);
     }
 
     QList<Block> skippedBlocks() const