Inferred path parameters fallback to "DefaultParamsType" when specifying "RequestBodyType"

• Related to #1073

Current behavior

rest.get<never>('/user/:id', (req) => {
  req.params.id // is not an inferred type
  req.params // DefaultParamsType
})

Expected behavior

rest.get<never>('/user/:id', (req) => {
  req.params.id // is an inferred "string"
  req.params // { id: string } (inferred)
})

[kettanaito]

I’m sad we didn’t get to ship this to our users. @cmolina, thank you for the fantastic work on this. The change is not forgotten, and I hope once TS will get around generics and we can merge this.

[kettanaito]

I had a wild thought to try to propagate the path type to the resolver like this:

function createRestHandler(path: PathType) {
  const resolver: Resolver<PathType> = () => {}
  // ...
}

I have doubts this will work but will give it a try in a playground.