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/********************* */
/*! \file sygus_print_callback.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds
** This file is part of the CVC4 project.
** Copyright (c) 2009-2017 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief sygus print callback functions
**/
#include "cvc4_private.h"
#ifndef __CVC4__PRINTER__SYGUS_PRINT_CALLBACK_H
#define __CVC4__PRINTER__SYGUS_PRINT_CALLBACK_H
#include <vector>
#include "expr/node.h"
namespace CVC4 {
namespace printer {
/** sygus let expression constructor printer
*
* This class is used for printing sygus
* datatype constructor terms whose top symbol
* is a let expression.
* For example, for grammar:
* A -> (let ((x B)) (+ A 1)) | x | (+ A A) | 0
* B -> 0 | 1
* the first constructor for A takes as arguments
* (B,A) and has operator
* (lambda ((y B) (z A)) (+ z 1))
* CVC4's support for let expressions in grammars
* is highly limited, since notice that the
* argument y : B is unused.
*
* For the above constructor, we have that
* d_let_body is (+ z 1),
* d_sygus_let_args is { y, z },
* d_sygus_num_let_input_args is 1, since
* y is an original input argument of the
* let expression, but z is not.
*/
class SygusLetExpressionConstructorPrinter
: public SygusDatatypeConstructorPrinter
{
public:
SygusLetExpressionPrinter(Node let_body,
std::vector<Node>& let_args,
unsigned ninput_args);
~SygusLetExpressionPrinter() {}
/** print sygus term e on output out using printer p */
virtual void toStreamSygus(const Printer* p,
std::ostream& out,
Expr e) const override;
private:
/** let body of the sygus term */
Node d_sygus_let_body;
/** let arguments */
std::vector<Node> d_sygus_let_args;
/** number of arguments that are interpreted as input arguments */
unsigned d_sygus_num_let_input_args;
/** do string replace
* Replaces all occurrences of oldStr with newStr in str.
*/
void doStrReplace(std::string& str,
const std::string& oldStr,
const std::string& newStr) const;
};
/** sygus named constructor printer
*
* This callback is used for explicitly naming
* the builtin term that a sygus datatype constructor
* should be printed as. This is used for printing
* terms in sygus grammars that involve defined
* functions. For example, for grammar :
* A -> f( A ) | 0
* where f is defined as:
* (define-fun ((x Int)) Int (+ x 1))
* this class can be used as a callback for printing
* the first sygus datatype constructor f, where we use
* analog operator (lambda (x) (+ x 1)).
*/
class SygusNamedConstructorPrinter : public SygusDatatypeConstructorPrinter
{
public:
SygusNamedConstructorPrinter(std::string name);
~SygusNamedConstructorPrinter() {}
/** print sygus term e on output out using printer p */
virtual void toStreamSygus(const Printer* p,
std::ostream& out,
Expr e) const override;
private:
/** the defined function name */
std::string d_name;
};
/** sygus empty printer
*
* This callback is used for printing constructors whose operators are
* implicit, such as identity functions. For example, for grammar :
* A -> B
* B -> x | 0 | 1
* The first constructor of A, call it cons, has sygus operator (lambda (x) x).
* Call toStreamSygus on cons( t ) should call toStreamSygus on t directly.
*/
class SygusEmptyConstructorPrinter : public SygusDatatypeConstructorPrinter
{
public:
SygusEmptyConstructorPrinter(std::string name);
~SygusEmptyConstructorPrinter() {}
/** print sygus term e on output out using printer p */
virtual void toStreamSygus(const Printer* p,
std::ostream& out,
Expr e) const override;
};
} /* CVC4::printer namespace */
} /* CVC4 namespace */
#endif /* __CVC4__PRINTER__SYGUS_PRINT_CALLBACK_H */
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