View Source Erlex

Convert Erlang style structs and error messages to equivalent Elixir.

Useful for pretty printing things like Dialyzer errors and Observer state. NOTE: Because this code calls the Elixir formatter, it requires Elixir 1.6+.

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Changelog

Check out the Changelog.

Installation

The package can be installed from Hex by adding erlex to your list of dependencies in mix.exs:

def deps do
  [
    {:erlex, "~> 0.2"},
  ]
end

Usage

Invoke Erlex.pretty_print/1 with the input string.

iex> str = ~S"('Elixir.Plug.Conn':t(),binary() | atom(),'Elixir.Keyword':t() | map()) -> 'Elixir.Plug.Conn':t()"
iex> Erlex.pretty_print(str)
(Plug.Conn.t(), binary() | atom(), Keyword.t() | map()) :: Plug.Conn.t()

While the lion's share of the work is done via invoking Erlex.pretty_print/1, other higher order functions exist for further formatting certain messages by running through the Elixir formatter. Because we know the previous example is a type, we can invoke the Erlex.pretty_print_contract/1 function, which would format that appropriately for very long lines.

iex> str = ~S"('Elixir.Plug.Conn':t(),binary() | atom(),'Elixir.Keyword':t() | map(), map() | atom(), non_neg_integer(), binary(), binary(), binary(), binary(), binary()) -> 'Elixir.Plug.Conn':t()"
iex> Erlex.pretty_print_contract(str)
(
  Plug.Conn.t(),
  binary() | atom(),
  Keyword.t() | map(),
  map() | atom(),
  non_neg_integer(),
  binary(),
  binary(),
  binary(),
  binary(),
  binary()
) :: Plug.Conn.t()

Contributing

We welcome contributions of all kinds! To get started, click here.

Code of Conduct

Be sure to read and follow the code of conduct.

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