1 files changed, 5 insertions, 3 deletions
diff --git a/impl/main.cpp b/impl/main.cpp
index 6fbbda9..e3e0ae3 100644
--- a/impl/main.cpp
+++ b/impl/main.cpp
@@ -50,7 +50,7 @@ Expression<T>& treeToExpression(pANTLR3_BASE_TREE node, EquationSystem<T>& syste
     Operator<T>* op = NULL;
     if (name == "min") {
       op = new Minimum<T>();
-    } else if (name == "+") {
+    } else if (name == "+" || name == "add") {
       op = new Addition<T>();
     } else if (name == "-") {
       if (args.size() == 1) {
@@ -58,11 +58,13 @@ Expression<T>& treeToExpression(pANTLR3_BASE_TREE node, EquationSystem<T>& syste
       } else {
         op = new Subtraction<T>();
       }
-    } else if (name == "*") {
+    } else if (name == "sub") {
+      op = new Subtraction<T>();
+    } else if (name == "*" || name == "mult") {
       op = new Multiplication<T>();
     } else if (name == ";") {
       op = new Comma<T>();
-    } else if (name == "GUARD") {
+    } else if (name == "GUARD" || name == "guard") {
       op = new Guard<T>();
     } else {
       std::cout << "throw exception" << *(char*)NULL;