flow-bluebird

Attempting to override builtin Promise with Bluebird and make async/await work.

Was not successful with the declare syntax, so I'm redirecting requires to a util/bluebird.js module that defines the class' interface.

Output is:

$ flow
test.js:6
  6:   let output = await doubleAsync(a);
                    ^^^^^^^^^^^^^^^^^^^^ await
  7:   return output / 2;
              ^^^^^^ Promise. This type is incompatible with
  7:   return output / 2;
              ^^^^^^^^^^ number

test.js:17
 17:   return result[0] / 2;
              ^^^^^^^^^ access of computed property/element. Indexable signature not found in
 17:   return result[0] / 2;
              ^^^^^^ Promise

test.js:21
 21:   return await Promise.doesntExist(doubleAsync(a));
                      ^^^^^^^^^^^ property `doesntExist`. Property not found in
704: export default Promise;
                    ^^^^^^^ statics of Promise. See: util/bluebird.js:704


Found 3 errors

Would expect no errors on line 6 and 17, error on 21 is expected and indicative that the bluebird definition is being properly read.