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/********************* */
/*! \file smt_mode.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds, Ying Sheng, Morgan Deters
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 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 Enumeration type for the mode of an SmtEngine.
**/
#include "cvc4_public.h"
#ifndef CVC4__SMT__SMT_MODE_H
#define CVC4__SMT__SMT_MODE_H
#include <iosfwd>
namespace CVC4 {
/**
* The mode of the solver, which is an extension of Figure 4.1 on
* page 52 of the SMT-LIB version 2.6 standard
* http://smtlib.cs.uiowa.edu/papers/smt-lib-reference-v2.6-r2017-07-18.pdf
*/
enum class SmtMode
{
// the initial state of the solver
START,
// normal state of the solver, after assert/push/pop/declare/define
ASSERT,
// immediately after a check-sat returning "sat"
SAT,
// immediately after a check-sat returning "unknown"
SAT_UNKNOWN,
// immediately after a check-sat returning "unsat"
UNSAT,
// immediately after a successful call to get-abduct
ABDUCT,
// immediately after a successful call to get-interpol
INTERPOL
};
/**
* Writes a SmtMode to a stream.
*
* @param out The stream to write to
* @param m The mode to write to the stream
* @return The stream
*/
std::ostream& operator<<(std::ostream& out, SmtMode m);
} // namespace CVC4
#endif
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