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112 lines
3.5 KiB
C++
112 lines
3.5 KiB
C++
/*
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This file is part of KDevelop
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Copyright 2009 Ramón Zarazúa <killerfox512+kde@gmail.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2 as published by the Free Software Foundation.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef ASTUTILITIES_H
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#define ASTUTILITIES_H
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#include "ast.h"
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#include "default_visitor.h"
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//! All Ast traversing and manipulating convenience functions
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namespace AstUtils
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{
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/**
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* Convenience function to downcast pointers from AST nodes, since dynamic_cast can't be used.
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* Works mostly like expected with dynamic_cast, except that pointer need not be specified
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* (since the AST works with only pointer). If the types don't match, NULL is returned.
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*/
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template<typename Target, typename Source>
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Target * node_cast(Source * node)
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{
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if(!node)
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return 0;
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return Target::__node_kind == node->kind ? reinterpret_cast<Target *>(node) : 0;
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}
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/**
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*Access a declaration node from a translation unit of a known type.
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* @tparam NodeType The known type of the node to be expecting
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* @param tree the top level node of the tree
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* @param index index of the declaration to access, is checked for validity
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* @return the child requested casted to the type, or NULL if invalid
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*/
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template<typename NodeType>
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inline NodeType * childNode(TranslationUnitAST * tree, int index)
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{
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return index < tree->declarations->count() ? node_cast<NodeType>(tree->declarations->at(index)->element) : 0;
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}
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template<typename NodeType>
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inline NodeType * childNode(ClassSpecifierAST * tree, int index)
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{
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return index < tree->member_specs->count() ? node_cast<NodeType>(tree->member_specs->at(index)->element) : 0;
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}
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inline InitDeclaratorAST * childInitDeclarator(SimpleDeclarationAST * decl, int index)
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{
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return index < decl->init_declarators->count() ? decl->init_declarators->at(index)->element : 0;
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}
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inline ParameterDeclarationAST * parameterAtIndex(ParameterDeclarationClauseAST * params, int index)
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{
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return index < params->parameter_declarations->count() ? params->parameter_declarations->at(index)->element : 0;
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}
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inline ParameterDeclarationAST * parameterAtIndex(DeclaratorAST * decl, int index)
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{
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return decl->parameter_declaration_clause ? parameterAtIndex(decl->parameter_declaration_clause, index) : 0;
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}
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//Helper class to collect all the nodes in an AST branch
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struct CollectorVisitor : public DefaultVisitor
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{
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CollectorVisitor(int kind) : m_kind(kind) {}
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virtual void visit(AST * node)
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{
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if(node && node->kind == m_kind)
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m_nodes.push_back(node);
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DefaultVisitor::visit(node);
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}
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int m_kind;
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QList<AST *> m_nodes;
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};
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/**
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* Find all the AST nodes of the requested type down this @p branch in an AST
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* @tparam Node must be a declared AST type
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* @return A list of all the encountered nodes of the requested type
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*/
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template<typename Node>
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inline QList<AST *> findAllNodesInBranch(AST * branch)
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{
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CollectorVisitor collector(Node::__node_kind);
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collector.visit(branch);
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return collector.m_nodes;
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}
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}
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#endif //ASTUTILITIES_H
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