setProp action results in massive type definitions in large projects

[sergioisidoro]

I've started to hit a typescript limit

src/data/stores/RootStore.ts(10,14): error TS7056: The inferred type of this node exceeds the maximum length the compiler will serialize. An explicit type annotation is needed.

After a while of debugging, I finally realised that one of the culprits was setProp as it was popping out over and over again in the type definitions. Not that it was a recursive issue (it did stop at some point), but having a somewhat deeply nested tree resulted in setProp type annotations to grow VERY rapidly on some cases.

In this case a singlesetProp in the type definitions has almost 600 lines.

So I'm leaving this here as a navigation warning / Improvement idea - use withSetPropAction seldomly, or make changes to the type annotations of that action.

[frankcalise]

Discussion to continue over at MST repo: mobxjs/mobx-state-tree#2115