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42 lines
837 B
C++
42 lines
837 B
C++
/*++
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Copyright (c) 2019 Microsoft Corporation
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Module Name:
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dd_pdd.cpp
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Abstract:
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Poly DD package
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Author:
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Nikolaj Bjorner (nbjorner) 2019-12-23
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Lev Nachmanson (levnach) 2019-12-23
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Revision History:
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--*/
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#include "math/dd/dd_pdd.h"
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namespace dd {
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// calculates the value of a pdd expression based on the given values of the variables
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class pdd_eval {
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std::function<rational (unsigned)> m_var2val;
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public:
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pdd_eval() {}
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std::function<rational (unsigned)>& var2val() { return m_var2val; } // setter
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const std::function<rational (unsigned)>& var2val() const { return m_var2val; } // getter
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rational operator()(pdd const& p) {
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if (p.is_val()) {
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return p.val();
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}
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return (*this)(p.hi()) * m_var2val(p.var()) + (*this)(p.lo());
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}
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};
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}
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