+++ /dev/null
-#ifndef INC_TreeParser_hpp__
-#define INC_TreeParser_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/TreeParser.hpp#2 $
- */
-
-#include <antlr/config.hpp>
-#include <antlr/AST.hpp>
-#include <antlr/ASTFactory.hpp>
-#include <antlr/BitSet.hpp>
-#include <antlr/RecognitionException.hpp>
-#include <antlr/MismatchedTokenException.hpp>
-#include <antlr/TreeParserSharedInputState.hpp>
-
-#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
-namespace antlr {
-#endif
-
-class ANTLR_API TreeParser {
-public:
- TreeParser()
- : astFactory(0)
- , inputState(new TreeParserInputState())
- , traceDepth(0)
- {
- }
-
- TreeParser(const TreeParserSharedInputState& state)
- : astFactory(0)
- , inputState(state)
- , traceDepth(0)
- {
- }
-
- virtual ~TreeParser()
- {
- }
-
- /// Get the AST return value squirreled away in the parser
- virtual RefAST getAST() = 0;
-
- /** Make sure current lookahead symbol matches the given set
- * Throw an exception upon mismatch, which is caught by either the
- * error handler or by a syntactic predicate.
- */
- virtual void match(RefAST t, const BitSet& b)
- {
- if ( !t || t==ASTNULL || !b.member(t->getType()) )
- throw MismatchedTokenException( getTokenNames(), getNumTokens(),
- t, b, false );
- }
-
- /** Specify the AST factory to be used during tree building. (Compulsory)
- * Setting the factory is compulsory (if you intend to modify
- * the tree in the treeparser). The AST Factory is shared between
- * parser (who builds the initial AST) and treeparser.
- * @see Parser::getASTFactory()
- */
- virtual void setASTFactory(ASTFactory* factory)
- {
- astFactory = factory;
- }
- /// Return pointer to ASTFactory
- virtual ASTFactory* getASTFactory() const
- {
- return astFactory;
- }
- /// Get the name for token 'num'
- virtual const char* getTokenName(int num) const = 0;
- /// Return the number of tokens defined
- virtual int getNumTokens() const = 0;
- /// Return an array of getNumTokens() token names
- virtual const char* const* getTokenNames() const = 0;
-
- /// Parser error-reporting function can be overridden in subclass
- virtual void reportError(const RecognitionException& ex);
- /// Parser error-reporting function can be overridden in subclass
- virtual void reportError(const ANTLR_USE_NAMESPACE(std)string& s);
- /// Parser warning-reporting function can be overridden in subclass
- virtual void reportWarning(const ANTLR_USE_NAMESPACE(std)string& s);
-
- /// These are used during when traceTreeParser commandline option is passed.
- virtual void traceIndent();
- virtual void traceIn(const char* rname, RefAST t);
- virtual void traceOut(const char* rname, RefAST t);
-
- /** The AST Null object; the parsing cursor is set to this when
- * it is found to be null. This way, we can test the
- * token type of a node without having to have tests for 0
- * everywhere.
- */
- static RefAST ASTNULL;
-
-protected:
- virtual void match(RefAST t, int ttype)
- {
- if (!t || t == ASTNULL || t->getType() != ttype )
- throw MismatchedTokenException( getTokenNames(), getNumTokens(),
- t, ttype, false );
- }
-
- virtual void matchNot(RefAST t, int ttype)
- {
- if ( !t || t == ASTNULL || t->getType() == ttype )
- throw MismatchedTokenException( getTokenNames(), getNumTokens(),
- t, ttype, true );
- }
-
- /** AST support code; parser and treeparser delegate to this object */
- ASTFactory* astFactory;
-
- /// The input state of this tree parser.
- TreeParserSharedInputState inputState;
-
- /** Used to keep track of indent depth with -traceTreeParser */
- int traceDepth;
-
- /** Utility class which allows tracing to work even when exceptions are
- * thrown.
- */
- class Tracer {
- private:
- TreeParser* parser;
- const char* text;
- RefAST tree;
- public:
- Tracer(TreeParser* p, const char* t, RefAST a)
- : parser(p), text(t), tree(a)
- {
- parser->traceIn(text,tree);
- }
- ~Tracer()
- {
- parser->traceOut(text,tree);
- }
- private:
- Tracer(const Tracer&); // undefined
- const Tracer& operator=(const Tracer&); // undefined
- };
-
-private:
- // no copying of treeparser instantiations...
- TreeParser(const TreeParser& other);
- TreeParser& operator=(const TreeParser& other);
-};
-
-#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
-}
-#endif
-
-#endif //INC_TreeParser_hpp__