Add TheoryState objects to each Theory (#4920)

This initializes all theories with a TheoryState object (apart from bool and builtin which do not require one).

Two additional theories are known to require special state objects: TheoryArith, which has a custom way of detecting when in conflict, and TheoryQuantifiers, which can leverage a special state object for the purposes of refactoring and splitting apart QuantifiersEngine further. All other theories use default TheoryState objects.

Notice this PR does not update the theories to use these states yet, it simply adds the objects.

1 files changed, 40 insertions, 0 deletions

diff --git a/src/theory/quantifiers/quantifiers_state.h b/src/theory/quantifiers/quantifiers_state.h
new file mode 100644
index 000000000..a6611e734
--- /dev/null
+++ b/src/theory/quantifiers/quantifiers_state.h
@@ -0,0 +1,40 @@
+/*********************                                                        */
+/*! \file quantifiers_state.h
+ ** \verbatim
+ ** Top contributors (to current version):
+ **   Andrew Reynolds, 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 Utility for quantifiers state
+ **/
+
+#include "cvc4_private.h"
+
+#ifndef CVC4__THEORY__QUANTIFIERS__QUANTIFIERS_STATE_H
+#define CVC4__THEORY__QUANTIFIERS__QUANTIFIERS_STATE_H
+
+#include "theory/theory_state.h"
+
+namespace CVC4 {
+namespace theory {
+namespace quantifiers {
+
+/**
+ * The quantifiers state.
+ */
+class QuantifiersState : public TheoryState
+{
+ public:
+  QuantifiersState(context::Context* c, context::UserContext* u, Valuation val);
+  ~QuantifiersState() {}
+};
+
+}  // namespace quantifiers
+}  // namespace theory
+}  // namespace CVC4
+
+#endif /* CVC4__THEORY__QUANTIFIERS__QUANTIFIERS_STATE_H */