1 files changed, 22 insertions, 2 deletions
diff --git a/src/expr/kind_template.h b/src/expr/kind_template.h
index 96c34a02a..718fd58f4 100644
--- a/src/expr/kind_template.h
+++ b/src/expr/kind_template.h
@@ -1,5 +1,6 @@
 /*********************                                                        */
-/** kind_template.h
+/*! \file kind_template.h
+ ** \verbatim
  ** Original author: mdeters
  ** Major contributors: none
  ** Minor contributors (to current version): none
@@ -8,7 +9,9 @@
  ** Courant Institute of Mathematical Sciences
  ** New York University
  ** See the file COPYING in the top-level source directory for licensing
- ** information.
+ ** information.\endverbatim
+ **
+ ** \brief Template for the Node kind header.
  **
  ** Template for the Node kind header.
  **/
@@ -57,6 +60,23 @@ ${kind_printers}
   return out;
 }
 
+/** Returns true if the given kind is associative. This is used by ExprManager to
+ * decide whether it's safe to modify big expressions by changing the grouping of
+ * the arguments. */
+/* TODO: This could be generated. */
+inline bool isAssociative(::CVC4::Kind k) {
+  switch(k) {
+  case kind::AND:
+  case kind::OR:
+  case kind::MULT:
+  case kind::PLUS:
+    return true;
+
+  default:
+    return false;
+  }
+}
+
 inline std::string kindToString(::CVC4::Kind k) {
   std::stringstream ss;
   ss << k;