check whether assignment is deterministic

Former-commit-id: c0ca4a3bbf [formerly 8ae48734e2]
Former-commit-id: 8362f5731b

src/storage/pgcl/AssignmentStatement.cpp

@@ -1,10 +1,3 @@
-/* 
- * File:   AssignmentStatement.cpp
- * Author: Lukas Westhofen
- * 
- * Created on 11. April 2015, 17:42
- */
-
 #include "src/storage/pgcl/AssignmentStatement.h"
 
 namespace storm {
@@ -13,6 +6,10 @@ namespace storm {
             variable(variable), expression(expression) {
         }
         
+        bool AssignmentStatement::isDeterministic() const {
+            return expression.which() == 0;
+        }
+        
         boost::variant<storm::expressions::Expression, storm::pgcl::UniformExpression> const& AssignmentStatement::getExpression() const {
             return this->expression;
         }

src/storage/pgcl/AssignmentStatement.h

@@ -32,6 +32,8 @@ namespace storm {
              * @return The expression of the assignment.
              */
             boost::variant<storm::expressions::Expression, storm::pgcl::UniformExpression> const& getExpression() const;
+            
+            bool isDeterministic() const;
             /**
              * Returns the left hand variable of the assignemnt.
              * @return The variable to which the expression is assigned.