update

src/main/java/com/ql/util/express/parse/ExpressParse.java

@@ -107,6 +107,7 @@ public class ExpressParse {
 						 || result.size() >=2 
 						    && (   result.get(result.size() - 2).isTypeEqualsOrChild("OP_LIST")
 						        || result.get(result.size() - 2).isTypeEqualsOrChild(",")
+                                || result.get(result.size() - 2).isTypeEqualsOrChild("return")
 						        ) 
 						    && result.get(result.size() - 2).isTypeEqualsOrChild(")")==false
 						    && result.get(result.size() - 2).isTypeEqualsOrChild("]")==false 

src/test/java/com/ql/util/express/test/MinusOperatorTest.java

+package com.ql.util.express.test;
+
+import com.ql.util.express.DefaultContext;
+import com.ql.util.express.ExpressRunner;
+import com.ql.util.express.IExpressContext;
+import org.junit.Test;
+
+/**
+ * Created by tianqiao on 17/11/13.
+ */
+public class MinusOperatorTest {
+    
+    @Test
+    public void testChange_1() throws Exception {
+        ExpressRunner runner = new ExpressRunner(false,true);
+        IExpressContext<String, Object> context = new DefaultContext<String, Object>();
+        String test1 = "return -50";
+        System.out.println(runner.execute(test1, context, null, true, false));
+    }
+}