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port Grobner

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2019-10-30 19:12:11 -07:00
parent 4651eb7042
commit 71c3a09f4a
4 changed files with 44 additions and 11 deletions
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28
src/math/lp/nex.h
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@ -443,6 +443,34 @@ inline std::ostream& operator<<(std::ostream& out, const nex& e ) {
// return less_than_nex(a, b, lt);
// }
inline rational get_nex_val(const nex* e, std::function<rational (unsigned)> var_val) {
switch (e->type()) {
case expr_type::SCALAR:
return to_scalar(e)->value();
case expr_type::SUM:
{
rational r(0);
for (auto c: *to_sum(e)) {
r += get_nex_val(c, var_val);
}
return r;
}
case expr_type::MUL:
{
const nex_mul * m = to_mul(e);
rational t = m->coeff();
for (auto& c: *m)
t *= get_nex_val(c.e(), var_val).expt(c.pow());
return t;
}
case expr_type::VAR:
return var_val(to_var(e)->var());
default:
TRACE("nla_cn_details", tout << e->type() << "\n";);
SASSERT(false);
return rational();
}
}
inline std::unordered_set<lpvar> get_vars_of_expr(const nex *e ) {
std::unordered_set<lpvar> r;