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/********************* */
/*! \file input.h
** \verbatim
** Original author: cconway
** Major contributors: none
** Minor contributors (to current version): mdeters
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010 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.\endverbatim
**
** \brief Base for parser inputs.
**
** Base for parser inputs.
**/
#include "cvc4parser_public.h"
#ifndef __CVC4__PARSER__INPUT_H
#define __CVC4__PARSER__INPUT_H
#include <iostream>
#include <string>
#include <stdio.h>
#include <vector>
#include "expr/expr.h"
#include "expr/expr_manager.h"
#include "parser/parser_exception.h"
#include "parser/parser_options.h"
#include "util/Assert.h"
namespace CVC4 {
class Command;
class Type;
class FunctionType;
namespace parser {
class CVC4_PUBLIC InputStreamException : public Exception {
public:
InputStreamException(const std::string& msg);
virtual ~InputStreamException() throw() { }
};
/** Wrapper around an ANTLR3 input stream. */
class InputStream {
/** The name of this input stream. */
std::string d_name;
/** Indicates whether the input file is a temporary that we should
* delete on exit. */
bool d_fileIsTemporary;
protected:
/** Initialize the input stream with a name. */
InputStream(std::string name, bool isTemporary=false) :
d_name(name),
d_fileIsTemporary(isTemporary) {
}
public:
/** Destructor. */
virtual ~InputStream() {
if( d_fileIsTemporary ) {
remove(d_name.c_str());
}
}
/** Get the name of this input stream. */
const std::string getName() const;
};
class Parser;
/**
* An input to be parsed. The static factory methods in this class (e.g.,
* <code>newFileInput</code>, <code>newStringInput</code>) create a parser
* for the given input language and attach it to an input source of the
* appropriate type.
*/
class CVC4_PUBLIC Input {
friend class Parser; // for parseError, parseCommand, parseExpr
friend class ParserBuilder;
/** The input stream. */
InputStream *d_inputStream;
/* Since we own d_tokenStream and it needs to be freed, we need to prevent
* copy construction and assignment.
*/
Input(const Input& input) { Unimplemented("Copy constructor for Input."); }
Input& operator=(const Input& input) { Unimplemented("operator= for Input."); }
/** Create an input for the given file.
*
* @param lang the input language
* @param filename the input filename
* @param useMmap true if the parser should use memory-mapped I/O (default: false)
*/
static Input* newFileInput(InputLanguage lang,
const std::string& filename,
bool useMmap=false)
throw (InputStreamException, AssertionException);
/** Create an input for the given stream.
*
* @param lang the input language
* @param input the input stream
* @param name the name of the stream, for use in error messages
*/
static Input* newStreamInput(InputLanguage lang,
std::istream& input,
const std::string& name)
throw (InputStreamException, AssertionException);
/** Create an input for the given string
*
* @param lang the input language
* @param input the input string
* @param name the name of the stream, for use in error messages
*/
static Input* newStringInput(InputLanguage lang,
const std::string& input,
const std::string& name)
throw (InputStreamException, AssertionException);
public:
/** Destructor. Frees the token stream and closes the input. */
virtual ~Input();
protected:
/** Create an input.
*
* @param inputStream the input stream
*/
Input(InputStream& inputStream);
/** Retrieve the input stream for this parser. */
InputStream *getInputStream();
/** Parse a command from
* the input by invoking the implementation-specific parsing method. Returns
* <code>NULL</code> if there is no command there to parse.
*
* @throws ParserException if an error is encountered during parsing.
*/
virtual Command* parseCommand()
throw (ParserException, AssertionException) = 0;
/**
* Throws a <code>ParserException</code> with the given message.
*/
virtual void parseError(const std::string& msg)
throw (ParserException, AssertionException) = 0;
/** Parse an
* expression from the input by invoking the implementation-specific
* parsing method. Returns a null <code>Expr</code> if there is no
* expression there to parse.
*
* @throws ParserException if an error is encountered during parsing.
*/
virtual Expr parseExpr()
throw (ParserException, AssertionException) = 0;
/** Set the Parser object for this input. */
virtual void setParser(Parser& parser) = 0;
};
}/* CVC4::parser namespace */
}/* CVC4 namespace */
#endif /* __CVC4__PARSER__ANTLR_INPUT_H */
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