add stubs for arithmetic

src/sat/smt/arith_internalize.cpp

@@ -0,0 +1,34 @@
+/*++
+Copyright (c) 2020 Microsoft Corporation
+
+Module Name:
+
+    arith_internalize.cpp
+
+Abstract:
+
+    Theory plugin for arithmetic
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2020-09-08
+
+--*/
+#pragma once
+
+#include "sat/smt/euf_solver.h"
+#include "sat/smt/arith_solver.h"
+
+namespace arith {
+
+    bool solver::visit(expr* e) { return false; }
+    bool solver::visited(expr* e) { return false; }
+    bool solver::post_visit(expr* e, bool sign, bool root) { return false; }
+    void solver::ensure_var(euf::enode* n) {}
+    sat::literal solver::internalize(expr* e, bool sign, bool root, bool learned) { return sat::null_literal; }
+    void solver::internalize(expr* e, bool redundant) {}
+    euf::theory_var solver::mk_var(euf::enode* n) { return euf::null_theory_var; }
+    bool solver::is_shared(theory_var v) const { return false; }   
+    void solver::pop_core(unsigned n) {}
+        
+}