* 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, 6 insertions, 0 deletions

diff --git a/src/expr/expr_template.cpp b/src/expr/expr_template.cpp
index b4359cf2a..05d31499d 100644
--- a/src/expr/expr_template.cpp
+++ b/src/expr/expr_template.cpp
@@ -36,6 +36,12 @@ using namespace CVC4::kind;
 
 namespace CVC4 {
 
+namespace expr {
+
+const int ExprSetDepth::s_iosIndex = std::ios_base::xalloc();
+
+}/* CVC4::expr namespace */
+
 std::ostream& operator<<(std::ostream& out, const Expr& e) {
   e.toStream(out);
   return out;