Missing features or transforms

[goodmind]

This issue would track what I can find is missing from converter when you typecheck resulting Flow files.

This list will be updated when I find something new

1. Unexpected use of this type. This happens because Flow doesn't understand this outside of class declarations

   Example:

   declare interface A {
     foo(): this;
     bar(): this;
   }
   

2. Illegal name. or Unsupported key in object type. when numbers used as keys in interfaces or types.

   type Foo = {
     0: "ACCESS";
   }
   interface IFoo {
     0: "ACCESS";
   }
   

   Flow PR: https://github.com/facebook/flow/pull/7593

[goodmind]

Flow now supports type parameter defaults in generic functions! https://github.com/facebook/flow/commit/c18ee0d8ee7999ef65ee21d0113b7351c5dc1e15