separated state machine generation into an abstract class

src/Main.java

@@ -1,6 +1,8 @@
 import generator.RT;
 import generator.gen.Gen;
 
+import java.util.function.Supplier;
+
 public class Main implements Runnable {
     public static void main(String[] args) {
         RT.runWithGeneratorSupport(Main.class);
@@ -10,6 +12,23 @@ public class Main implements Runnable {
     public void run() {
 //        await();
         lexer();
+//        lambda();
+    }
+
+    void lambda(){
+        var gen = ((Supplier<Gen<Integer, String>>)() -> {
+            Gen.yield(12);
+            return Gen.ret("hello");
+        }).get();
+
+        while(true) {
+            var next = gen.next();
+            if(next instanceof Gen.Yield(var e)) System.out.println(e);
+            else if(next instanceof Gen.Ret(var ret)){
+                System.out.println(ret);
+                break;
+            }
+        }
     }
 
     void await(){
@@ -22,8 +41,11 @@ public class Main implements Runnable {
                 break;
             }
         }
+
+        Runnable meow = () -> {};
     }
 
+
     void lexer(){
         var gen = Lexer.parse("f7(x,y,z,w, u,v, othersIg) = v-(x*y+y+ln(z)^2*sin(z*pi/2))/(w*u)+sqrt(othersIg*120e-1)");
 //        var gen = Examples.test(new double[]{1,2,3,4});