organized, added futures

src/Examples.java

@@ -1,4 +1,4 @@
-import generator.Gen;
+import generator.gen.Gen;
 
 public class Examples {
     //    public static Gen<String, Void> parse(String str){

src/Lexer.java

@@ -1,4 +1,4 @@
-import generator.Gen;
+import generator.gen.Gen;
 
 public class Lexer {
     public sealed interface Token{}

src/Main.java

@@ -1,5 +1,5 @@
 import generator.Fun;
-import generator.Gen;
+import generator.gen.Gen;
 
 public class Main implements Runnable {
     public static void main(String[] args) {

src/generator/future/Future.java

@@ -0,0 +1,18 @@
+package generator.future;
+
+public interface Future<R> {
+
+    @SuppressWarnings("unchecked")
+    default R poll(Waker waker){
+        return (R) Pending.INSTANCE;
+    }
+
+    default R await(){
+        throw new RuntimeException();
+    }
+
+    final class Pending{
+        private static final Pending INSTANCE = new Pending();
+        private Pending(){}
+    }
+}

src/generator/future/Waker.java

@@ -0,0 +1,5 @@
+package generator.future;
+
+public interface Waker {
+    void wake();
+}

src/generator/gen/Gen.java

@@ -1,4 +1,4 @@
-package generator;
+package generator.gen;
 
 public interface Gen<Y, R> {
     Res<Y, R> next();

src/generator/runtime/GeneratorBuilder.java

@@ -1,6 +1,6 @@
 package generator.runtime;
 
-import generator.Gen;
+import generator.gen.Gen;
 
 import java.lang.classfile.*;
 import java.lang.classfile.attribute.InnerClassInfo;

src/generator/runtime/GeneratorClassLoader.java

@@ -1,7 +1,7 @@
 package generator.runtime;
 
 import generator.Fun;
-import generator.Gen;
+import generator.gen.Gen;
 
 import java.io.IOException;
 import java.lang.classfile.*;