44 lines
1.9 KiB
C++
44 lines
1.9 KiB
C++
// Copyright 2010-2014 Google
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef OR_TOOLS_LINEAR_SOLVER_MODEL_VALIDATOR_H_
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#define OR_TOOLS_LINEAR_SOLVER_MODEL_VALIDATOR_H_
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#include <string>
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#include "ortools/linear_solver/linear_solver.pb.h"
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namespace operations_research {
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// Returns an empty std::string iff the model is valid and not trivially infeasible.
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// Otherwise, returns a description of the first error or trivial infeasibility
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// encountered.
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//
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// NOTE(user): the code of this method (and the client code too!) is
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// considerably simplified by this std::string-based, simple API. If clients
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// require it, we could add a formal error status enum.
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std::string FindErrorInMPModelProto(const MPModelProto& model);
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// Returns an empty std::string if the solution hint given in the model is a feasible
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// solution. Otherwise, returns a description of the first reason for
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// infeasibility.
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//
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// This function can be useful for debugging/checking that the given solution
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// hint is feasible when it is expected to be the case. The feasibility is
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// checked up to the given tolerance using the
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// ::operations_research::IsLowerWithinTolerance() function.
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std::string FindFeasibilityErrorInSolutionHint(const MPModelProto& model,
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double tolerance);
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} // namespace operations_research
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#endif // OR_TOOLS_LINEAR_SOLVER_MODEL_VALIDATOR_H_
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