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/********************* -*- C++ -*- */
/** parser.h
** This file is part of the CVC4 prototype.
** Copyright (c) 2009 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.
**
** Parser abstraction.
**/
#ifndef __CVC4_PARSER_H
#define __CVC4_PARSER_H
#include "core/exception.h"
#include "core/lang.h"
namespace CVC4 {
class ValidityChecker;
class Expr;
// Internal parser state and other data
class ParserData;
class Parser {
private:
ParserData* d_data;
// Internal methods for constructing and destroying the actual parser
void initParser();
void deleteParser();
public:
// Constructors
Parser(ValidityChecker* vc, InputLanguage lang,
// The 'interactive' flag is ignored when fileName != ""
bool interactive = true,
const std::string& fileName = "");
Parser(ValidityChecker* vc, InputLanguage lang, std::istream& is,
bool interactive = false);
// Destructor
~Parser();
// Read the next command.
Expr next();
// Check if we are done (end of input has been reached)
bool done() const;
// The same check can be done by using the class Parser's value as
// a Boolean
operator bool() const { return done(); }
void printLocation(std::ostream & out) const;
// Reset any local data that depends on validity checker
void reset();
}; // end of class Parser
// The global pointer to ParserTemp. Each instance of class Parser
// sets this pointer before any calls to the lexer. We do it this
// way because flex and bison use global vars, and we want each
// Parser object to appear independent.
class ParserTemp;
extern ParserTemp* parserTemp;
}/* CVC4 namespace */
#endif /* __CVC4_PARSER_H */
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