Chapter 28.4

1 files changed, 11 insertions, 0 deletions

diff --git a/clox/src/vm.c b/clox/src/vm.c
index 6b15a3a..d248609 100644
--- a/clox/src/vm.c
+++ b/clox/src/vm.c
@@ -65,12 +65,16 @@ void initVM() {
   initTable(&vm.globals);
   initTable(&vm.strings);
 
+  vm.initString = NULL;
+  vm.initString = copyString("init", 4);
+
   defineNative("clock", clockNative);
 }
 
 void freeVM() {
   freeTable(&vm.globals);
   freeTable(&vm.strings);
+  vm.initString = NULL;
   freeObjects();
 }
 
@@ -116,6 +120,13 @@ static bool callValue(Value callee, int argCount) {
     case OBJ_CLASS: {
       ObjClass *klass = AS_CLASS(callee);
       vm.stackTop[-argCount - 1] = OBJ_VAL(newInstance(klass));
+      Value initializer;
+      if (tableGet(&klass->methods, vm.initString, &initializer)) {
+        return call(AS_CLOSURE(initializer), argCount);
+      } else if (argCount != 0) {
+        runtimeError("Expected 0 arguments but got %d.", argCount);
+        return false;
+      }
       return true;
     }
     case OBJ_CLOSURE: