1 files changed, 32 insertions, 0 deletions
diff --git a/clox/src/vm.c b/clox/src/vm.c
index c1f0b90..1d82dd1 100644
--- a/clox/src/vm.c
+++ b/clox/src/vm.c
@@ -282,6 +282,38 @@ static InterpretResult run() {
       *frame->closure->upvalues[slot]->location = peek(0);
       break;
     }
+    case OP_GET_PROPERTY: {
+      if (!IS_INSTANCE(peek(0))) {
+        runtimeError("Only instances have properties.");
+        return INTERPRET_RUNTIME_ERROR;
+      }
+
+      ObjInstance *instance = AS_INSTANCE(peek(0));
+      ObjString *name = READ_STRING();
+
+      Value value;
+      if (tableGet(&instance->fields, name, &value)) {
+        pop(); /* Instance */
+        push(value);
+        break;
+      }
+
+      runtimeError("Undefined property '%s'.", name->chars);
+      return INTERPRET_RUNTIME_ERROR;
+    }
+    case OP_SET_PROPERTY: {
+      if (!IS_INSTANCE(peek(1))) {
+        runtimeError("Only instances have fields.");
+        return INTERPRET_RUNTIME_ERROR;
+      }
+
+      ObjInstance *instance = AS_INSTANCE(peek(1));
+      tableSet(&instance->fields, READ_STRING(), peek(0));
+      Value value = pop();
+      pop();
+      push(value);
+      break;
+    }
     case OP_EQUAL: {
       Value b = pop();
       Value a = pop();