move value factories to model

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

src/model/struct_factory.h

@@ -0,0 +1,54 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    struct_factory.h
+
+Abstract:
+
+    <abstract>
+
+Author:
+
+    Leonardo de Moura (leonardo) 2008-11-06.
+
+Revision History:
+
+--*/
+#ifndef STRUCT_FACTORY_H_
+#define STRUCT_FACTORY_H_
+
+#include "model/value_factory.h"
+#include "util/obj_hashtable.h"
+
+class model_core;
+
+/**
+   \brief Abstract factory for structured values such as: arrays and algebraic datatypes.
+*/
+class struct_factory : public value_factory {
+protected:
+    typedef obj_hashtable<expr> value_set;
+    typedef obj_map<sort, value_set *> sort2value_set;
+
+    model_core &          m_model;
+    sort2value_set        m_sort2value_set;
+    expr_ref_vector       m_values;
+    sort_ref_vector       m_sorts;
+    ptr_vector<value_set> m_sets;
+    
+    value_set * get_value_set(sort * s);
+
+public:
+    struct_factory(ast_manager & m, family_id fid, model_core & md);
+
+    ~struct_factory() override;
+
+    bool get_some_values(sort * s, expr_ref & v1, expr_ref & v2) override;
+
+    void register_value(expr * array_value) override;
+};
+
+#endif /* STRUCT_FACTORY_H_ */
+