Split E-matching strategies to own files (#5807)

Code move + format only

1 files changed, 66 insertions, 0 deletions

diff --git a/src/theory/quantifiers/ematching/inst_strategy.h b/src/theory/quantifiers/ematching/inst_strategy.h
new file mode 100644
index 000000000..0a4c1b76f
--- /dev/null
+++ b/src/theory/quantifiers/ematching/inst_strategy.h
@@ -0,0 +1,66 @@
+/*********************                                                        */
+/*! \file inst_strategy.h
+ ** \verbatim
+ ** Top contributors (to current version):
+ **   Andrew Reynolds, Morgan Deters, Mathias Preiner
+ ** 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 Instantiation Engine classes
+ **/
+
+#include "cvc4_private.h"
+
+#ifndef CVC4__THEORY__QUANTIFIERS__INST_STRATEGY_H
+#define CVC4__THEORY__QUANTIFIERS__INST_STRATEGY_H
+
+#include <vector>
+#include "expr/node.h"
+#include "theory/theory.h"
+
+namespace CVC4 {
+namespace theory {
+
+class QuantifiersEngine;
+
+namespace quantifiers {
+
+/** A status response to process */
+enum class InstStrategyStatus
+{
+  // the strategy is not finished
+  STATUS_UNFINISHED,
+  // the status of the strategy is unknown
+  STATUS_UNKNOWN,
+};
+
+/**
+ * A base class for instantiation strategies within E-matching.
+ */
+class InstStrategy
+{
+ public:
+  InstStrategy(QuantifiersEngine* qe) : d_quantEngine(qe) {}
+  virtual ~InstStrategy() {}
+  /** presolve */
+  virtual void presolve() {}
+  /** reset instantiation */
+  virtual void processResetInstantiationRound(Theory::Effort effort) = 0;
+  /** process method, returns a status */
+  virtual InstStrategyStatus process(Node f, Theory::Effort effort, int e) = 0;
+  /** identify */
+  virtual std::string identify() const { return std::string("Unknown"); }
+
+ protected:
+  /** reference to the instantiation engine */
+  QuantifiersEngine* d_quantEngine;
+}; /* class InstStrategy */
+
+}  // namespace quantifiers
+}  // namespace theory
+}  // namespace CVC4
+
+#endif /* CVC4__THEORY__QUANTIFIERS__INSTANTIATION_ENGINE_H */