* theory "tree" rewriting implemented and works

* added TheoryArith::preRewrite() to test and demonstrate
  the use of pre-rewriting.

* array types and type checking now supported

* array type checking now supported

* theoryOf() dispatching properly to arrays now

* theories now required to implement a (simple) identify()
  function that returns a string identifying them for
  debugging/user output purposes

* added "builtin" theory to hold all built-in kinds and their
  type rules and rewriting (currently only exploding distinct)

* fixed production build failure (regarding NodeSetDepth)

* removed an errant "using namespace std" in util/bitvector.h
  (and made associated trivial fixes elsewhere)

* fixes to make unexpected exceptions more verbose in debug builds

* fixes to make multiple, cascading assertion fails simpler

* minor other fixes to comments etc.

1 files changed, 17 insertions, 4 deletions

diff --git a/src/theory/arrays/theory_arrays.h b/src/theory/arrays/theory_arrays.h
index 52e63831c..69498cfb2 100644
--- a/src/theory/arrays/theory_arrays.h
+++ b/src/theory/arrays/theory_arrays.h
@@ -23,9 +23,7 @@
 
 #include "theory/theory.h"
 
-namespace context {
-class Context;
-}
+#include <iostream>
 
 namespace CVC4 {
 namespace theory {
@@ -37,10 +35,25 @@ public:
   ~TheoryArrays();
   void preRegisterTerm(TNode n) { }
   void registerTerm(TNode n) { }
+
+  RewriteResponse preRewrite(TNode in, bool topLevel) {
+    Debug("arrays-rewrite") << "pre-rewriting " << in
+                            << " topLevel==" << topLevel << std::endl;
+    return RewritingComplete(in);
+  }
+
+  RewriteResponse postRewrite(TNode in, bool topLevel) {
+    Debug("arrays-rewrite") << "post-rewriting " << in
+                            << " topLevel==" << topLevel << std::endl;
+    return RewritingComplete(in);
+  }
+
   void check(Effort e);
   void propagate(Effort e) { }
   void explain(TNode n, Effort e) { }
-};
+  void shutdown() { }
+  std::string identify() const { return std::string("TheoryArrays"); }
+};/* class TheoryArrays */
 
 }/* CVC4::theory::arrays namespace */
 }/* CVC4::theory namespace */