isolated proto_model obsolete code

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

src/smt/proto_model/struct_factory.cpp

@@ -0,0 +1,78 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    struct_factory.cpp
+
+Abstract:
+
+    <abstract>
+
+Author:
+
+    Leonardo de Moura (leonardo) 2008-11-06.
+
+Revision History:
+
+--*/
+#include"struct_factory.h"
+#include"proto_model.h"
+
+struct_factory::value_set * struct_factory::get_value_set(sort * s) {
+    value_set * set = 0;
+    if (!m_sort2value_set.find(s, set)) {
+        set = alloc(value_set);
+        m_sort2value_set.insert(s, set);
+        m_sorts.push_back(s);
+        m_sets.push_back(set);
+    }
+    SASSERT(set != 0);
+    return set;
+}
+
+struct_factory::struct_factory(ast_manager & m, family_id fid, proto_model & md):
+    value_factory(m, fid),
+    m_model(md),
+    m_values(m),
+    m_sorts(m) {
+}
+
+struct_factory::~struct_factory() {
+    std::for_each(m_sets.begin(), m_sets.end(), delete_proc<value_set>());
+}
+
+void struct_factory::register_value(expr * new_value) {
+    sort * s        = m_manager.get_sort(new_value);
+    value_set * set = get_value_set(s);
+    if (!set->contains(new_value)) {
+        m_values.push_back(new_value);
+        set->insert(new_value);
+    }
+}
+
+bool struct_factory::get_some_values(sort * s, expr_ref & v1, expr_ref & v2) {
+    value_set * set = get_value_set(s);
+    switch (set->size()) {
+    case 0:
+        v1 = get_fresh_value(s);
+        v2 = get_fresh_value(s);
+        return v1 != 0 && v2 != 0;
+    case 1:
+        v1 = get_some_value(s);
+        v2 = get_fresh_value(s);
+        return v2 != 0;
+    default:
+        obj_hashtable<expr>::iterator it = set->begin();
+        v1 = *it;
+        ++it;
+        v2 = *it;
+        return true;
+    }
+}
+
+
+
+
+
+