(proof-new) Add bound variable manager (#5655)

This is a common utility for constructing canonical bound variables.

1 files changed, 57 insertions, 0 deletions

diff --git a/src/expr/bound_var_manager.cpp b/src/expr/bound_var_manager.cpp
new file mode 100644
index 000000000..1532e43de
--- /dev/null
+++ b/src/expr/bound_var_manager.cpp
@@ -0,0 +1,57 @@
+/*********************                                                        */
+/*! \file bound_var_manager.cpp
+ ** \verbatim
+ ** Top contributors (to current version):
+ **   Andrew Reynolds
+ ** This file is part of the CVC4 project.
+ ** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
+ ** in the top-level source directory and their institutional affiliations.
+ ** All rights reserved.  See the file COPYING in the top-level source
+ ** directory for licensing information.\endverbatim
+ **
+ ** \brief Bound variable manager
+ **/
+
+#include "expr/bound_var_manager.h"
+
+#include "expr/node_manager_attributes.h"
+
+namespace CVC4 {
+
+// TODO: only enable when proofs are enabled
+BoundVarManager::BoundVarManager() : d_keepCacheVals(true) {}
+
+BoundVarManager::~BoundVarManager() {}
+
+void BoundVarManager::enableKeepCacheValues(bool isEnabled)
+{
+  d_keepCacheVals = isEnabled;
+}
+
+void BoundVarManager::setNameAttr(Node v, const std::string& name)
+{
+  v.setAttribute(expr::VarNameAttr(), name);
+}
+
+Node BoundVarManager::getCacheValue(TNode cv1, TNode cv2)
+{
+  return NodeManager::currentNM()->mkNode(kind::SEXPR, cv1, cv2);
+}
+
+Node BoundVarManager::getCacheValue(TNode cv1, TNode cv2, size_t i)
+{
+  return NodeManager::currentNM()->mkNode(
+      kind::SEXPR, cv1, cv2, getCacheValue(i));
+}
+
+Node BoundVarManager::getCacheValue(size_t i)
+{
+  return NodeManager::currentNM()->mkConst(Rational(i));
+}
+
+Node BoundVarManager::getCacheValue(TNode cv, size_t i)
+{
+  return getCacheValue(cv, getCacheValue(i));
+}
+
+}  // namespace CVC4