public static ObjBoundMethod newBoundMethod(Value_t receiver, ObjClosure method)
{
ObjBoundMethod bound = (ObjBoundMethod)ALLOCATE_OBJ(ObjType.OBJ_BOUND_METHOD);
bound.receiver = receiver;
bound.method = method;
return(bound);
}
private static bool callValue(Value_t callee, int argCount)
{
if (Value.IS_OBJ(callee))
{
ObjType _type = Object.OBJ_TYPE(callee);
switch (Object.OBJ_TYPE(callee))
{
case ObjType.OBJ_BOUND_METHOD:
{
ObjBoundMethod bound = Object.AS_BOUND_METHOD(callee);
vm.stack[vm.stackTop - argCount - 1] = bound.receiver;
return(call(bound.method, argCount));
}
case ObjType.OBJ_CLASS:
{
ObjClass klass = Object.AS_CLASS(callee);
vm.stack[vm.stackTop - argCount - 1] = Value.OBJ_VAL(Object.newInstance(klass));
Value_t initializer = new Value_t();
if (Table.tableGet(ref klass.methods, vm.initString, ref initializer))
{
return(call(Object.AS_CLOSURE(initializer), argCount));
}
else if (argCount != 0)
{
runtimeError("Expected 0 arguments but got {0}.", argCount.ToString());
return(false);
}
vm.frames[vm.frameCount - 1]._ip_index += 2; // HACK FIX
return(true);
}
case ObjType.OBJ_CLOSURE:
return(call(Object.AS_CLOSURE(callee), argCount));
case ObjType.OBJ_NATIVE:
{
NativeFn native = Object.AS_NATIVE(callee);
Value_t result = native(argCount, vm.stackTop - argCount);
vm.stackTop -= argCount + 1;
push(result);
vm.frames[vm.frameCount - 1]._ip_index += 2; // HACK FIX
return(true);
}
default:
// Non-callable object type.
break;
}
}
runtimeError("Can only call functions and classes.");
return(false);
}
// Generics, <T>, doesn't seem to work with classes?
static Obj allocateObject(int size, ObjType type)
{
Obj object_ = null;
switch (type)
{
case ObjType.OBJ_STRING:
object_ = new ObjString();
break;
case ObjType.OBJ_FUNCTION:
object_ = new ObjFunction();
break;
case ObjType.OBJ_INSTANCE:
object_ = new ObjInstance();
break;
case ObjType.OBJ_NATIVE:
object_ = new ObjNative();
break;
case ObjType.OBJ_CLOSURE:
object_ = new ObjClosure();
break;
case ObjType.OBJ_UPVALUE:
object_ = new ObjUpvalue();
break;
case ObjType.OBJ_CLASS:
object_ = new ObjClass();
break;
case ObjType.OBJ_BOUND_METHOD:
object_ = new ObjBoundMethod();
break;
default:
object_ = null; // clox: (Obj*)reallocate(NULL, 0, size);
break;
}
object_.type = type;
object_.isMarked = false;
object_.next = VM.vm.objects;
VM.vm.objects = object_;
#if DEBUG_LOG_GC
System.Console.WriteLine("{0} allocate {1} for {2}", object_._mem_id.ToString(), size.ToString(), type.ToString());
#endif
return(object_);
}
private static bool bindMethod(ObjClass klass, ObjString name)
{
Value_t method = new Value_t();
if (!Table.tableGet(ref klass.methods, name, ref method))
{
runtimeError("Undefined property '{0}'.", new string(name.chars, 0, name.chars.Length - 1));
return(false);
}
ObjBoundMethod bound = Object.newBoundMethod(peek(0), Object.AS_CLOSURE(method));
pop();
push(Value.OBJ_VAL(bound));
return(true);
}
private static void blackenObject(Obj object_)
{
#if DEBUG_LOG_GC
System.Console.Write("{0} blacken ", object_._mem_id.ToString());
Value.printValue(Value.OBJ_VAL(object_));
System.Console.WriteLine();
#endif
switch (object_.type)
{
case ObjType.OBJ_BOUND_METHOD:
{
ObjBoundMethod bound = (ObjBoundMethod)object_;
markValue(ref bound.receiver);
markObject((Obj)bound.method);
break;
}
case ObjType.OBJ_CLASS:
{
ObjClass klass = (ObjClass)object_;
markObject((Obj)klass.name);
Table.markTable(ref klass.methods);
break;
}
case ObjType.OBJ_CLOSURE:
{
ObjClosure closure = (ObjClosure)object_;
markObject((Obj)closure.function);
for (int i = 0; i < closure.upvalueCount; i++)
{
markObject((Obj)closure.upvalues[i]);
}
break;
}
case ObjType.OBJ_FUNCTION:
{
ObjFunction function = (ObjFunction)object_;
markObject((Obj)function.name);
markArray(ref function.chunk.constants);
break;
}
case ObjType.OBJ_INSTANCE:
{
ObjInstance instance = (ObjInstance)object_;
markObject((Obj)(instance.klass));
Table.markTable(ref instance.fields);
break;
}
case ObjType.OBJ_UPVALUE:
markValue(ref ((ObjUpvalue)object_).closed);
break;
case ObjType.OBJ_NATIVE:
case ObjType.OBJ_STRING:
break;
}
}