已解决:
```
<item>
<name>change long press cap to shift</name>
<identifier>private.cap_to_shift</identifier>
<autogen>
__HoldingKeyToKey__
KeyCode::CAPSLOCK,
<!--short press-->
@
begin KeyCode::ESCAPE,
@
end <!--hold-->
@
begin KeyCode::SHIFT_L,
@
end Option::NOREPEAT,
ThresholdMillisecond::RawValue::2000,
</autogen>
</item>