Initialize theory rewriters in theories (#4197)

Until now, the `Rewriter` was responsible for creating `TheoryRewriter`
instances. This commit adds a method `mkTheoryRewriter()` that theories
override to create an instance of their corresponding theory rewriter.
The advantage is that the theories can pass additional information to
their theory rewriter (e.g. a statistics object).

1 files changed, 6 insertions, 0 deletions

diff --git a/src/theory/sep/theory_sep.cpp b/src/theory/sep/theory_sep.cpp
index 0b6e7a5fb..1d0ad904c 100644
--- a/src/theory/sep/theory_sep.cpp
+++ b/src/theory/sep/theory_sep.cpp
@@ -29,6 +29,7 @@
 #include "theory/quantifiers/term_util.h"
 #include "theory/quantifiers_engine.h"
 #include "theory/rewriter.h"
+#include "theory/sep/theory_sep_rewriter.h"
 #include "theory/theory_model.h"
 #include "theory/valuation.h"
 
@@ -64,6 +65,11 @@ TheorySep::~TheorySep() {
   }
 }
 
+std::unique_ptr<TheoryRewriter> TheorySep::mkTheoryRewriter()
+{
+  return std::unique_ptr<TheoryRewriter>(new TheorySepRewriter());
+}
+
 void TheorySep::setMasterEqualityEngine(eq::EqualityEngine* eq) {
   d_equalityEngine.setMasterEqualityEngine(eq);
 }