// -*- mode: C++ -*-
//
// Copyright (c) 2007, 2008, 2009, 2010, 2011 The University of Utah
// All rights reserved.
//
// This file is part of `csmith', a random generator of C programs.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//
//   * Redistributions in binary form must reproduce the above copyright
//     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

#ifndef CONSTANT_H
#define CONSTANT_H

///////////////////////////////////////////////////////////////////////////////

#include <ostream>
#include <string>
#include <vector>

#include "Expression.h"
#include "Type.h"

class CGContext;
class Variable;

/*
 *
 */
class Constant : public Expression
{
public:
	// Factory method.
	static Constant *make_random(const Type* type);
	static Constant *make_random_upto(unsigned int limit);
	static Constant *make_random_nonzero(const Type* type);

	virtual bool compatible(const Variable *v) const;

	virtual bool compatible(const Expression *exp) const;

	// Factory method.
	static Constant *make_int(int v);
	
	Expression *clone() const;

	CVQualifiers get_qualifiers(void) const { return CVQualifiers(true, false);} 

	virtual void get_eval_to_subexps(vector<const Expression*>& subs) const {subs.push_back(this);}

	Constant(const Type *t, const std::string &v);
	explicit Constant(const Constant &c);
	virtual ~Constant(void);

	//

	virtual const Type &get_type(void) const;
	// Unused:
	const std::string &get_value(void) const { return value; }
	
	string get_field(size_t fid) const;

	virtual bool less_than(int num) const;
	virtual bool not_equals(int num) const;
	virtual bool equals(int num) const;

	virtual void get_referenced_ptrs(std::vector<const Variable*>& /*ptrs*/) const {};
	virtual unsigned int get_complexity(void) const { return 1;}
	// unsigned long SizeInBytes(void) const;
	virtual void Output(std::ostream &) const;

private:	
	const Type* type;
	const std::string value;
};

///////////////////////////////////////////////////////////////////////////////

#endif // CONSTANT_H

// Local Variables:
// c-basic-offset: 4
// tab-width: 4
// End:

// End of file.
