Lazy evaluation for routes with named parameters

[kuy]

Actual resolver doesn't accept a redirection to a route with named parameters.

const routes = {
  '/blog/posts/:id': ...
  '/about': '/blog/posts/42', // => undefined
}

A function, which returns a route name, can be used for a lazy evaluation.

const routes = {
  '/blog/posts/:id': ...
  '/about': () => '/blog/posts/42',
}

After building route matcher, the lazy route will be replaced by an auto-generated saga.

const routes = {
  '/blog/posts/:id': ...
  '/about': function* () {
    yield put(push('/blog/posts/42'));
  },
}

We now need something like post-process for the route definition.

[kuy]

To wrap with an anonymous function is annoying. If the resolver can't find a destination, it can fallback to lazy (runtime) evaluation with wrapping a path string.

const routes = {
  '/blog/posts/:id': Post,
  '/posts/:id': '/blog/posts/:id',
  '/about': '/blog/posts/42',
  '/contact': '/blog/posts/8/edit',
}

This routes will be...

const routes = {
  '/blog/posts/:id': Post,
  '/posts/:id': Post, // OK
  '/about': function* () {
    yield '/blog/posts/42'; // Redirection
  },
  '/contact': function* () {
    yield '/blog/posts/8/edit'; // Redirection, but not found
  },
}