+++ /dev/null
-#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: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/antlr/TokenStreamSelector.hpp#2 $
- */
-
-#include <antlr/config.hpp>
-#include <antlr/TokenStream.hpp>
-#include <map>
-#include <stack>
-
-#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
-namespace antlr {
-#endif
-
-/** A token stream MUX (multiplexor) knows about n token streams
- * and can multiplex them onto the same channel for use by token
- * stream consumer like a parser. This is a way to have multiple
- * lexers break up the same input stream for a single parser.
- * Or, you can have multiple instances of the same lexer handle
- * multiple input streams; this works great for includes.
- */
-class ANTLR_API TokenStreamSelector : public TokenStream {
-protected:
- /** The set of inputs to the MUX */
-#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;
-
- /** The currently-selected token stream input */
- TokenStream* input;
-
- /** Used to track stack of input streams */
-#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);
-
- /// Return the stream from which tokens are being pulled at the moment.
- 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);
-
- /** Abort recognition of current Token and try again.
- * A stream can push a new stream (for include files
- * for example, and then retry(), which will cause
- * the current stream to abort back to this.nextToken().
- * this.nextToken() then asks for a token from the
- * current stream, which is the new "substream."
- */
- void retry();
-
- /** Set the stream without pushing old stream */
- void select(TokenStream* stream);
-
- void select(const ANTLR_USE_NAMESPACE(std)string& sname);
-};
-
-#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
-}
-#endif
-
-#endif //INC_TokenStreamSelector_hpp__