antlr/include/antlr/ASTFactory.hpp

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#ifndef INC_ASTFactory_hpp__
#define INC_ASTFactory_hpp__

/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.jGuru.com
 * Software rights: http://www.antlr.org/license.html
 *
 * $Id: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/antlr/ASTFactory.hpp#2 $
 */

#include <antlr/config.hpp>
#include <antlr/AST.hpp>
#include <antlr/ASTArray.hpp>
#include <antlr/ASTPair.hpp>

#include <istream>
#include <utility>

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
namespace antlr {
#endif

// Using these extra types to appease MSVC
typedef RefAST (*factory_type_)();
typedef ANTLR_USE_NAMESPACE(std)pair< const char*, factory_type_ >  factory_descriptor_;
typedef ANTLR_USE_NAMESPACE(std)vector< factory_descriptor_* >      factory_descriptor_list_;

class ANTLR_API ASTFactory {
public:
        typedef factory_type_             factory_type;
        typedef factory_descriptor_       factory_descriptor;
        typedef factory_descriptor_list_  factory_descriptor_list;
protected:
        /* The mapping of AST node type to factory..
         */
        factory_descriptor default_factory_descriptor;
        factory_descriptor_list nodeFactories;
public:
        ASTFactory();
        ASTFactory( const char* factory_node_name, factory_type factory );
        virtual ~ASTFactory();

        void registerFactory( int type, const char* ast_name, factory_type factory );
        void setMaxNodeType( int type );

        void addASTChild(ASTPair& currentAST, RefAST child);
        virtual RefAST create();
        RefAST create(int type);
        RefAST create(int type, const ANTLR_USE_NAMESPACE(std)string& txt);
        RefAST create(RefAST tr);
        RefAST create(RefToken tok);
        RefAST create(const ANTLR_USE_NAMESPACE(std)string& txt, ANTLR_USE_NAMESPACE(std)istream& infile );
        RefAST dup(RefAST t);
        RefAST dupList(RefAST t);
        RefAST dupTree(RefAST t);
        RefAST make(ANTLR_USE_NAMESPACE(std)vector<RefAST>& nodes);
        RefAST make(ASTArray* nodes);
        void makeASTRoot(ASTPair& currentAST, RefAST root);

        void setASTNodeFactory( const char* factory_node_name, factory_type factory );

#ifdef ANTLR_SUPPORT_XML

        RefAST LoadAST( ANTLR_USE_NAMESPACE(std)istream& infile );
#endif
protected:
        void loadChildren( ANTLR_USE_NAMESPACE(std)istream& infile, RefAST current );
        void loadSiblings( ANTLR_USE_NAMESPACE(std)istream& infile, RefAST current );
        bool checkCloseTag( ANTLR_USE_NAMESPACE(std)istream& infile );

#ifdef ANTLR_VECTOR_HAS_AT
        inline RefAST getNodeOfType( unsigned int type )
        {
                return RefAST(nodeFactories.at(type)->second());
        }
        const char* getASTNodeType( unsigned int type )
        {
                return nodeFactories.at(type)->first;
        }
        factory_type getASTNodeFactory( unsigned int type )
        {
                return nodeFactories.at(type)->second;
        }
#else
        inline RefAST getNodeOfType( unsigned int type )
        {
                return RefAST(nodeFactories[type]->second());
        }
        const char* getASTNodeType( unsigned int type )
        {
                return nodeFactories[type]->first;
        }
        factory_type getASTNodeFactory( unsigned int type )
        {
                return nodeFactories[type]->second;
        }
#endif

private:
        // no copying and such..
        ASTFactory( const ASTFactory& );
        ASTFactory& operator=( const ASTFactory& );
};

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
}
#endif

#endif //INC_ASTFactory_hpp__

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