45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
// Copyright 2010-2021 Google LLC
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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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#include "ortools/math_opt/cpp/linear_constraint.h"
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#include <utility>
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#include <vector>
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#include "ortools/math_opt/cpp/variable_and_expressions.h"
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#include "ortools/math_opt/indexed_model.h"
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namespace operations_research {
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namespace math_opt {
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std::vector<Variable> LinearConstraint::RowNonzeros() const {
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std::vector<Variable> result;
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for (const VariableId variable :
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model_->variables_in_linear_constraint(id_)) {
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result.push_back(Variable(model_, variable));
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}
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return result;
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}
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BoundedLinearExpression LinearConstraint::AsBoundedLinearExpression() const {
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LinearExpression terms;
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for (const VariableId var : model_->variables_in_linear_constraint(id_)) {
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terms +=
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Variable(model_, var) * model_->linear_constraint_coefficient(id_, var);
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}
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return lower_bound() <= std::move(terms) <= upper_bound();
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}
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} // namespace math_opt
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} // namespace operations_research
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