45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Jip J. Dekker <jip.dekker@monash.edu>
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#pragma once
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#include <minizinc/solver_instance.hh>
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#include <string>
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#ifdef ERROR // Microsoft.
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#undef ERROR
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#endif
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namespace MiniZinc {
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class RestartableSolverInstance {
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public:
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// Able to return to the solver into a position where no search decisions
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// have been made. SolverInstance must allow addDefinition calls after
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// restart call.
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virtual void restart() = 0;
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};
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class TrailableSolverInstance : public RestartableSolverInstance {
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public:
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// Returns the number of stored states
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virtual size_t states() = 0;
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// Able to store the current solver state to the Trail.
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virtual void pushState() = 0;
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// Able to restore the last solver state that was saved to the Trail.
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virtual void popState() = 0;
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};
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} // namespace MiniZinc
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