join

import { join } from "https://github.gh-proxy.cn/raw.githubusercontent.com/baetheus/fun/main/fn_either.ts";

Flatten nested FnEithers with the same input and left types.

@example

import * as FE from "./fn_either.ts";
import { pipe } from "./fn.ts";

const result = pipe(
  FE.right(FE.right(1)),
  FE.join,
)(null); // Right(1)

function join<D, A, B, L, J>(tua: FnEither<L, J, FnEither<D, B, A>>): FnEither<D & L, B | J, A>;

join<D, A, B, L, J>(tua: FnEither<L, J, FnEither<D, B, A>>): FnEither<D & L, B | J, A>

tua: FnEither<L, J, FnEither<D, B, A>>

FnEither<D & L, B | J, A>