mirror of
https://github.com/Z3Prover/z3
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40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
/*++
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Copyright (c) 2017 Microsoft Corporation
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Module Name:
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<name>
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Abstract:
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<abstract>
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Author:
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Nikolaj Bjorner (nbjorner)
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Lev Nachmanson (levnach)
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Revision History:
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--*/
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#pragma once
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namespace lp {
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class explanation {
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vector<std::pair<mpq, constraint_index>> m_explanation;
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std::unordered_set<unsigned> m_set_of_ci;
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public:
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void clear() { m_explanation.clear(); m_set_of_ci.clear(); }
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vector<std::pair<mpq, constraint_index>>::const_iterator begin() const { return m_explanation.begin(); }
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vector<std::pair<mpq, constraint_index>>::const_iterator end() const { return m_explanation.end(); }
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void push_justification(constraint_index j, const mpq& v) {
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m_explanation.push_back(std::make_pair(v, j));
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}
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void push_justification(constraint_index j) {
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if (m_set_of_ci.find(j) != m_set_of_ci.end()) return;
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m_set_of_ci.insert(j);
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m_explanation.push_back(std::make_pair(one_of_type<mpq>(), j));
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}
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void reset() { m_explanation.reset(); }
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template <typename A> void add(const A& a) { for (constraint_index j : a) push_justification(j); }
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};
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}
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