HappyWith

Tiny syntax sugar around Elixir's with special form.

Why ?

Because I'm happy on how Elixir's with special form works, and can get used to the <- arrow but I still dont like to place commas between all the with expressions.

Back then before elixir 1.2 release, I implemented happy using case expressions, it leaked variables as normal case expressions would do, and overriding the standard = operator turned out to have some unexpectedissues. Also, after using standard with a bit, I really got to like it, except for the fact of having to place commas after expressions, so I wrote happy_with which is a very tiny macro that just rewrites to Elixir's standard with special form.

Installation

Available in Hex, the package can be installed as:

1. Add happy_with to your list of dependencies in mix.exs:

def deps do
  [{:happy_with, "~> 0.0.1"}]
end

Usage

import HappyWith

happy_with macro

happy_with do
  {:ok, friend} <- retrieve_friend
  name = String.downcase(friend)
  name
else
  _ -> "nobody"
end

rewrites into standard with form. Only the last expression in the happy_with block is given to with's do.

with({:ok, friend} <- retrieve_friend,
     name = String.downcase(friend))
do
  name
else
  _ -> "nobody"
end

IMHO the first one reads better.