add missing file

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/ast/rewriter/enum2bv_rewriter.h

@@ -0,0 +1,48 @@
+/*++
+Copyright (c) 2016 Microsoft Corporation
+
+Module Name:
+
+    enum2bv_rewriter.h
+
+Abstract:
+
+    Conversion from enumeration types to bit-vectors.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2016-10-18
+
+Notes:
+
+--*/
+#ifndef ENUM_REWRITER_H_
+#define ENUM_REWRITER_H_
+
+#include"datatype_decl_plugin.h"
+#include"rewriter_types.h"
+#include"expr_functors.h"
+
+class enum2bv_rewriter {
+    struct imp;
+    imp* m_imp;
+public:
+    enum2bv_rewriter(ast_manager & m, params_ref const& p);
+    ~enum2bv_rewriter();
+
+    void updt_params(params_ref const & p);
+    ast_manager & m() const;
+    unsigned get_num_steps() const;
+    void cleanup();
+    obj_map<func_decl, func_decl*> const& enum2bv() const;
+    obj_map<func_decl, func_decl*> const& bv2enum() const;
+    obj_map<func_decl, expr*> const& enum2def() const;
+    void operator()(expr * e, expr_ref & result, proof_ref & result_proof);
+    void push();
+    void pop(unsigned num_scopes);
+    void flush_side_constraints(expr_ref_vector& side_constraints);
+    unsigned num_translated() const;
+    void set_is_fd(i_sort_pred* sp) const;
+};
+
+#endif