add priority queue to instantiation

src/sat/smt/q_clause.cpp

@@ -0,0 +1,53 @@
+/*++
+Copyright (c) 2020 Microsoft Corporation
+
+Module Name:
+
+    q_clause.cpp
+
+Abstract:
+
+    Clause and literals
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2021-01-24
+
+--*/
+
+#include "sat/smt/q_clause.h"
+
+
+namespace q {
+
+    std::ostream& lit::display(std::ostream& out) const {
+        ast_manager& m = lhs.m();
+        if (m.is_true(rhs) && !sign) 
+            return out << lhs;
+        if (m.is_false(rhs) && !sign) 
+            return out << "(not " << lhs << ")";
+        return 
+            out << mk_bounded_pp(lhs, lhs.m(), 2) 
+                << (sign ? " != " : " == ") 
+                << mk_bounded_pp(rhs, rhs.m(), 2);
+    }
+
+    std::ostream& clause::display(euf::solver& ctx, std::ostream& out) const {
+        out << "clause:\n";
+        for (auto const& lit : m_lits)
+            lit.display(out) << "\n";
+        binding* b = m_bindings;
+        if (b) {
+            do {
+                for (unsigned i = 0; i < num_decls(); ++i)
+                    out << ctx.bpp((*b)[i]) << " ";
+                out << "\n";            
+                b = b->next();
+            }
+            while (b != m_bindings);
+        }
+        return out;
+    }
+
+
+}