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TokenStreamSelector.hpp

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#ifndef INC_TokenStreamSelector_hpp__
#define INC_TokenStreamSelector_hpp__

/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.jGuru.com
 * Software rights: http://www.antlr.org/license.html
 *
 * $Id: TokenStreamSelector.hpp,v 1.1 2004/10/08 16:27:34 dfisher Exp $
 */

#include <antlr/config.hpp>
#include <antlr/TokenStream.hpp>
#include <map>
#include <stack>

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
namespace antlr {
#endif

class ANTLR_API TokenStreamSelector : public TokenStream {
protected:
#ifdef OS_NO_ALLOCATOR
        typedef ANTLR_USE_NAMESPACE(std)less<ANTLR_USE_NAMESPACE(std)string> lessp;
        typedef ANTLR_USE_NAMESPACE(std)map<ANTLR_USE_NAMESPACE(std)string,TokenStream*,lessp> inputStreamNames_coll;
#else
        typedef ANTLR_USE_NAMESPACE(std)map<ANTLR_USE_NAMESPACE(std)string,TokenStream*> inputStreamNames_coll;
#endif
        inputStreamNames_coll inputStreamNames;

        TokenStream* input;

#ifdef OS_NO_ALLOCATOR
        typedef ANTLR_USE_NAMESPACE(std)stack<TokenStream*, ANTLR_USE_NAMESPACE(std)deque<TokenStream*> > streamStack_coll;
#else
        typedef ANTLR_USE_NAMESPACE(std)stack<TokenStream*> streamStack_coll;
#endif
        streamStack_coll streamStack;

public:
        TokenStreamSelector();
        ~TokenStreamSelector();

        void addInputStream(TokenStream* stream, const ANTLR_USE_NAMESPACE(std)string& key);

        TokenStream* getCurrentStream() const;

        TokenStream* getStream(const ANTLR_USE_NAMESPACE(std)string& sname) const;

        RefToken nextToken();

        TokenStream* pop();

        void push(TokenStream* stream);

        void push(const ANTLR_USE_NAMESPACE(std)string& sname);

        void retry();

        void select(TokenStream* stream);

        void select(const ANTLR_USE_NAMESPACE(std)string& sname);
};

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
}
#endif

#endif //INC_TokenStreamSelector_hpp__

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