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port grobner basis functionality, prepare create nex objects to the grobner basis calculation

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2019-09-19 15:51:01 -07:00
parent e8b6b870ac
commit a085edceff
12 changed files with 424 additions and 274 deletions
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4
src/math/lp/nex.h
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@ -63,6 +63,7 @@ public:
bool is_mul() const { return type() == expr_type::MUL; }
bool is_var() const { return type() == expr_type::VAR; }
bool is_scalar() const { return type() == expr_type::SCALAR; }
virtual bool is_pure_monomial() const { return false; }
std::string str() const { std::stringstream ss; print(ss); return ss.str(); }
virtual ~nex() {}
virtual bool contains(lpvar j) const { return false; }
@ -182,7 +183,8 @@ public:
const ptr_vector<nex>& children() const { return m_children;}
const ptr_vector<nex>* children_ptr() const { return &m_children;}
ptr_vector<nex>* children_ptr() { return &m_children;}
// A monomial is 'pure' if does not have a numeric coefficient.
bool is_pure_monomial() { return size() == 0 || (!m_children[0]->is_scalar()); }
std::ostream & print(std::ostream& out) const {
bool first = true;
for (const nex* v : m_children) {