Introduced helpers to rewrite types and names.

Done-with: Erik Verbruggen

src/libs/cplusplus/CppRewriter.h

@@ -0,0 +1,119 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#ifndef CPLUSPLUS_REWRITER_H
+#define CPLUSPLUS_REWRITER_H
+
+#include "CppDocument.h"
+#include "LookupContext.h"
+
+namespace CPlusPlus {
+
+class Rewrite;
+
+class CPLUSPLUS_EXPORT Substitution
+{
+    Q_DISABLE_COPY(Substitution)
+
+public:
+    Substitution() {}
+    virtual ~Substitution() {}
+
+    virtual FullySpecifiedType apply(const Name *name, Rewrite *rewrite) const = 0;
+};
+
+class CPLUSPLUS_EXPORT SubstitutionEnvironment
+{
+    QList<Substitution *> substs;
+
+public:
+    FullySpecifiedType apply(const Name *name, Rewrite *rewrite) const
+    {
+        if (name) {
+            for (int index = substs.size() - 1; index != -1; --index) {
+                const Substitution *subst = substs.at(index);
+
+                FullySpecifiedType ty = subst->apply(name, rewrite);
+                if (! ty->isUndefinedType())
+                    return ty;
+            }
+        }
+
+        return FullySpecifiedType();
+    }
+
+    void enter(Substitution *subst)
+    {
+        substs.append(subst);
+    }
+
+    void leave()
+    {
+        substs.removeLast();
+    }
+};
+
+class CPLUSPLUS_EXPORT ContextSubstitution: public Substitution
+{
+public:
+    ContextSubstitution(const LookupContext &context, Scope *scope);
+    virtual ~ContextSubstitution();
+
+    virtual FullySpecifiedType apply(const Name *name, Rewrite *rewrite) const;
+
+private:
+    LookupContext _context;
+    Scope *_scope;
+};
+
+
+class CPLUSPLUS_EXPORT SubstitutionMap: public Substitution
+{
+public:
+    SubstitutionMap();
+    virtual ~SubstitutionMap();
+
+    void bind(const Name *name, const FullySpecifiedType &ty);
+    virtual FullySpecifiedType apply(const Name *name, Rewrite *rewrite) const;
+
+private:
+    QList<QPair<const Name *, FullySpecifiedType> > _map;
+};
+
+CPLUSPLUS_EXPORT FullySpecifiedType rewriteType(const FullySpecifiedType &type,
+                                                const SubstitutionEnvironment &env,
+                                                Control *control);
+
+CPLUSPLUS_EXPORT const Name *rewriteName(const Name *name,
+                                         const SubstitutionEnvironment &env,
+                                         Control *control);
+
+} // end of namespace CPlusPlus
+
+#endif