move directory

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

src/ast/rewriter/cached_var_subst.h

@@ -0,0 +1,53 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    cached_var_subst.h
+
+Abstract:
+
+    <abstract>
+
+Author:
+
+    Leonardo de Moura (leonardo) 2009-01-23.
+
+Revision History:
+
+--*/
+#pragma once
+
+#include "ast/rewriter/var_subst.h"
+#include "util/map.h"
+
+class cached_var_subst {
+    struct key {
+        quantifier * m_qa;
+        unsigned     m_num_bindings;
+        expr *       m_bindings[0];
+    };
+    struct key_hash_proc {
+        unsigned operator()(key * k) const {
+            return string_hash(reinterpret_cast<char const *>(k->m_bindings), sizeof(expr *) * k->m_num_bindings, k->m_qa->get_id());
+        }
+    };
+    struct key_eq_proc {
+        bool operator()(key * k1, key * k2) const;
+    };
+    typedef map<key *, expr *, key_hash_proc, key_eq_proc> instances;
+    ast_manager&     m;
+    var_subst        m_proc;
+    expr_ref_vector  m_refs;
+    instances        m_instances;
+    region           m_region;
+    ptr_vector<key>  m_new_keys; // mapping from num_bindings -> next key
+    key*             m_key { nullptr };
+public:
+    cached_var_subst(ast_manager & m);
+    expr** operator()(quantifier * qa, unsigned num_bindings);
+    expr_ref operator()();
+    void reset();
+};
+
+