add recfun rewriting, remove quantifier based recfun

src/ast/rewriter/recfun_rewriter.h

@@ -0,0 +1,36 @@
+/*++
+Copyright (c) 2018 Microsoft Corporation
+
+Module Name:
+
+    recfun_rewriter.h
+
+Abstract:
+
+    Rewriter recursive function applications to values
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2020-04-26
+
+
+--*/
+
+#pragma once
+
+#include "ast/recfun_decl_plugin.h"
+#include "ast/rewriter/rewriter.h"
+
+class recfun_rewriter {
+    ast_manager& m;
+    recfun::util  m_rec;
+public:
+    recfun_rewriter(ast_manager& m): m(m), m_rec(m) {}
+    ~recfun_rewriter() {}
+    
+    br_status mk_app_core(func_decl * f, unsigned num_args, expr * const * args, expr_ref & result);
+
+    family_id get_fid() const { return m_rec.get_family_id(); }
+
+};
+