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https://github.com/Z3Prover/z3
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66 lines
2 KiB
C++
66 lines
2 KiB
C++
/*
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Copyright (c) 2017 Microsoft Corporation
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Author: Lev Nachmanson
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*/
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#pragma once
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#include "util/vector.h"
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#include <string>
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#include <algorithm>
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#include <utility>
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#include "util/lp/column_info.h"
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namespace lean {
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enum lconstraint_kind {
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LE = -2, LT = -1 , GE = 2, GT = 1, EQ = 0
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};
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inline std::ostream& operator<<(std::ostream& out, lconstraint_kind k) {
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switch (k) {
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case LE: return out << "<=";
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case LT: return out << "<";
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case GE: return out << ">=";
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case GT: return out << ">";
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case EQ: return out << "=";
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}
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return out << "??";
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}
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inline bool compare(const std::pair<mpq, var_index> & a, const std::pair<mpq, var_index> & b) {
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return a.second < b.second;
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}
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class ul_pair {
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constraint_index m_low_bound_witness;
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constraint_index m_upper_bound_witness;
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public:
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constraint_index& low_bound_witness() {return m_low_bound_witness;}
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constraint_index low_bound_witness() const {return m_low_bound_witness;}
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constraint_index& upper_bound_witness() { return m_upper_bound_witness;}
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constraint_index upper_bound_witness() const {return m_upper_bound_witness;}
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row_index m_i;
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bool operator!=(const ul_pair & p) const {
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return !(*this == p);
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}
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bool operator==(const ul_pair & p) const {
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return m_low_bound_witness == p.m_low_bound_witness
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&& m_upper_bound_witness == p.m_upper_bound_witness &&
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m_i == p.m_i;
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}
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// empty constructor
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ul_pair() :
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m_low_bound_witness(static_cast<constraint_index>(-1)),
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m_upper_bound_witness(static_cast<constraint_index>(-1)),
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m_i(static_cast<row_index>(-1))
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{}
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ul_pair(row_index ri) :
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m_low_bound_witness(static_cast<constraint_index>(-1)),
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m_upper_bound_witness(static_cast<constraint_index>(-1)),
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m_i(ri) {}
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ul_pair(const ul_pair & o): m_low_bound_witness(o.m_low_bound_witness), m_upper_bound_witness(o.m_upper_bound_witness), m_i(o.m_i) {}
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};
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}
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