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/*
This file is part of KDevelop
Copyright 2009 Ramón Zarazúa <killerfox512+kde@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef ASTUTILITIES_H
#define ASTUTILITIES_H
#include "ast.h"
//! All Ast traversing and manipulating convenience functions
namespace AstUtils
{
/**
* Convenience function to downcast pointers from AST nodes, since dynamic_cast can't be used.
* Works mostly like expected with dynamic_cast, except that pointer need not be specified
* (since the AST works with only pointer). If the types don't match, NULL is returned.
*/
template<typename Target, typename Source>
Target * node_cast(Source * node)
{
if(!node)
return 0;
return Target::__node_kind == node->kind ? reinterpret_cast<Target *>(node) : 0;
}
/**
*Access a declaration node from a translation unit of a known type.
* @tparam NodeType The known type of the node to be expecting
* @param tree the top level node of the tree
* @param index index of the declaration to access, is checked for validity
*/
template<typename NodeType>
NodeType * childNode(TranslationUnitAST * tree, int index)
{
Q_ASSERT(index < tree->declarations->count());
return node_cast<NodeType>(tree->declarations->at(index)->element);
}
template<typename NodeType>
NodeType * childNode(ClassSpecifierAST * tree, int index)
{
Q_ASSERT(index < tree->member_specs->count());
return node_cast<NodeType>(tree->member_specs->at(index)->element);
}
}
#endif //ASTUTILITIES_H
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