Function fxProxyDefineOwnProperty

xs/sources/xsProxy.c:259–306

}

txBoolean fxProxyDefineOwnProperty(txMachine* the, txSlot* instance, txID id, txIndex index, txSlot* slot, txFlag mask)
{
	txBoolean result;
	mxProxyDeclarations(_defineProperty);
	if (function) {
		/* THIS */
		mxPushSlot(handler);
		/* FUNCTION */
		mxPushSlot(function);
		mxCall();
		/* ARGUMENTS */
		mxPushSlot(target);
		mxPushUndefined();
		fxKeyAt(the, id, index, the->stack);
		fxDescribeProperty(the, slot, mask);
		mxRunCount(3);
		result = fxToBoolean(the, the->stack);
		mxPop();
		if (result) {
			mxPushUndefined();
			if (mxBehaviorGetOwnProperty(the, target->value.reference, id, index, the->stack)) {
				if (fxIsPropertyCompatible(the, the->stack, slot, mask)) {
					if ((mask & XS_DONT_DELETE_FLAG) && (slot->flag & XS_DONT_DELETE_FLAG)) {
						if (!(the->stack->flag & XS_DONT_DELETE_FLAG))
							mxTypeError("(proxy).defineProperty: true with non-configurable descriptor for configurable property");
					}
					if (the->stack->flag & XS_DONT_DELETE_FLAG) {
						if ((mask & XS_DONT_SET_FLAG) && (slot->flag & XS_DONT_SET_FLAG) && !(the->stack->flag & XS_DONT_SET_FLAG))
							mxTypeError("(proxy).defineProperty: true with non-writable descriptor for non-configurable writable property");
					}
				}
				else
					mxTypeError("(proxy).defineProperty: true with incompatible descriptor for existent property");
			}
			else if (mxBehaviorIsExtensible(the, target->value.reference)) {
				if ((mask & XS_DONT_DELETE_FLAG) && (slot->flag & XS_DONT_DELETE_FLAG))
					mxTypeError("(proxy).defineProperty: true with non-configurable descriptor for non-existent property");
			}
			else
				mxTypeError("(proxy).defineProperty: true with descriptor for non-existent property of non-extensible object");
			mxPop();
		}
	}
	else
		result = mxBehaviorDefineOwnProperty(the, target->value.reference, id, index, slot, mask);
	mxProxyPop();
	return result;
}

txBoolean fxProxyDeleteProperty(txMachine* the, txSlot* instance, txID id, txIndex index)
{