Correct indentation for pipe operator

[hunterboerner]

The elixir style guide recommends this:

# Multiline pipelines use a single level of indentation.
some_string
|> String.downcase
|> String.strip

# Multiline pipelines on the right side of a pattern match
# should be indented on a newline
sanitized_string =
  some_string
  |> String.downcase
  |> String.strip

emacs-elixir will indent the second example as:

sanitized_string =
  some_string
|> String.downcase
|> String.strip

It would be nice if support for the elixir style guide format could be added. Thanks :)

[gausby]

Also, I have seen core code written like this:

some_thing = some_string
             |> String.downcase
             |> String.strip

I don't know what the Elixir community think of that style, but I kinda like it.

[whatyouhide]

Hey @gausby, yes there definitely is code like the one you showed in the Elixir core. However, have a look at this discussion, the consensus is pretty much set on @hunterboerner's example.

PS, 👍 on the issue!

[gausby]

@whatyouhide coming from a node.js background I can say that it is really easy to change ones preferences when it comes to formatting, so I can change...but coming from a node.js background I also have some scepticism when it comes to style-guides…in this case I don't really buy the argument about the eyes that has to travel a further distance; seems more like a statement of personal aesthetics than something that is backed by studies.

But I can adapt to the equals-new-line-pipe-style. :)