readme

README.md

@@ -1 +1,22 @@
-`System.out.println("Hello World")` would actually be a major achievement. It's nowhere near that level...
+**So you wanted to build a JVM**
+
+_as in why not???_
+
+actually:
+`System.out.println("Hello World")` would actually be a major achievement. It's nowhere near that level...
+
+**so far**
+* starts a main class (TODO cmdline args)
+* loads classes from a classpath, including jar/jmod files
+* instantiates classes (TODO implement superclass instantiation)
+* runs bytecode (TODO more opcodes)
+* has INVOKEVIRTUAL and INVOKESPECIAL, including stackframes (TODO more invokes)
+
+**more TODO's**
+* native methods 
+* stacktraces
+* check visibility
+* IO
+
+**Ultimate goal** 
+* Hello world domination

src/vm.rs

@@ -73,6 +73,7 @@ impl Vm {
     }
 
     pub fn new_instance(&self, class: Arc<Class>) -> Object {
+        //TODO add fields from superclasses
         let mut data = HashMap::new();
         for f in &class.fields {
             let value = match f.type_of().as_str() {
@@ -263,11 +264,12 @@ impl Vm {
                     //TODO implement all opcodes
                     _ => {
                         panic!("opcode not implemented {:?}", self.stack)
+                        //TODO implement proper stacktraces
                     }
                 }
             }
         }
-        Err(anyhow!("should not happen"))
+        panic!("should not happen")
     }
 }