reorganize polysat functionality to use abstract solver interface

make dependency be self-contained

src/sat/smt/polysat/polysat_constraints.cpp

@@ -0,0 +1,47 @@
+/*++
+Copyright (c) 2021 Microsoft Corporation
+
+Module Name:
+
+    polysat constraints
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2021-03-19
+    Jakob Rath 2021-04-06
+
+--*/
+
+#include "sat/smt/polysat/polysat_core.h"
+#include "sat/smt/polysat/polysat_constraints.h"
+#include "sat/smt/polysat/polysat_ule.h"
+#include "sat/smt/polysat/polysat_umul_ovfl.h"
+
+namespace polysat {
+
+    signed_constraint constraints::ule(pdd const& p, pdd const& q) {
+        pdd lhs = p, rhs = q;
+        bool is_positive = true;
+        ule_constraint::simplify(is_positive, lhs, rhs);
+        auto* c = alloc(ule_constraint, p, q);
+        m_trail.push(new_obj_trail(c));
+        auto sc = signed_constraint(ckind_t::ule_t, c);
+        return is_positive ? sc : ~sc;
+    }
+
+    signed_constraint constraints::umul_ovfl(pdd const& p, pdd const& q) { 
+        auto* c = alloc(umul_ovfl_constraint, p, q);
+        m_trail.push(new_obj_trail(c));
+        return signed_constraint(ckind_t::umul_ovfl_t, c);
+    }
+
+    lbool signed_constraint::eval(assignment& a) const {
+        lbool r = m_constraint->eval(a);
+        return m_sign ? ~r : r;
+    }
+
+    std::ostream& signed_constraint::display(std::ostream& out) const {
+        if (m_sign) out << "~";
+        return out << *m_constraint;        
+    }
+}