attempt at getting variables to work.

__if.cpp

@@ -9,22 +9,22 @@ namespace jet {
 
       coreutils::MString result;
 
-      if(keywordExists("value1")) {
-	 if(keywordExists("expr"))
+      if(variableDefined("value1")) {
+	 if(variableDefined("expr"))
 	   throw coreutils::Exception("Either value1 or expr can be specified but not both.");
-	 if(keywordExists("value2")) {
-	    if(keywordExists("type")) {
+	 if(variableDefined("value2")) {
+	    if(variableDefined("type")) {
 
 	    } else
 	      throw coreutils::Exception("type expected if value1 and value2 specified.");
 	 } else
 	   throw coreutils::Exception("value2 required if value1 specified.");
-      } else if(keywordExists("expr")) {
-   	   if(keywordExists("value2"))
+      } else if(variableDefined("expr")) {
+   	   if(variableDefined("value2"))
 	        throw coreutils::Exception("value2 should not be specified with expr.");
-	      if(keywordExists("type"))
+	      if(variableDefined("type"))
 	        throw coreutils::Exception("type should not be specified with expr.");
-	      result = Expression(keywords["expr"]);
+	      result = Expression(variables["expr"]);
          std::cout << "result1: " << result << std::endl;
       }
       std::cout << "result2: " << result << std::endl;