BeamInspect

Inspect how your elixir module looks like in erlang / core erlang.

Installation

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

def deps do
  [
    {:beam_inspect, "~> 0.1.0", only: [:dev], runtime: false}
  ]
end

Usage

Example elixir module

defmodule Foo do
  def baz do
    :a == :b
  end
end

Inspect erlang

iex(1)> Foo |> BeamInspect.to_erlang() |> IO.puts()
# -file("lib/foo.ex", 1).
#
# -module('Elixir.Foo').
#
# -compile(no_auto_import).
#
# -export(['__info__'/1, baz/0]).
#
# -spec '__info__'(attributes | compile | functions |
#                  macros | md5 | module | deprecated) -> atom() |
#                                                         [{atom(), any()} |
#                                                          {atom(), byte(),
#                                                           integer()}].
#
# '__info__'(module) -> 'Elixir.Foo';
# '__info__'(functions) -> [{baz, 0}];
# '__info__'(macros) -> [];
# '__info__'(attributes) ->
#     erlang:get_module_info('Elixir.Foo', attributes);
# '__info__'(compile) ->
#     erlang:get_module_info('Elixir.Foo', compile);
# '__info__'(md5) ->
#     erlang:get_module_info('Elixir.Foo', md5);
# '__info__'(deprecated) -> [].
#
# baz() -> a == b.
:ok

Inspect core erlang

iex(1)> Foo |> BeamInspect.to_core_erlang(:noann) |> IO.puts()
# module 'Elixir.Foo' ['__info__'/1, 'baz'/0,
#                      'module_info'/0, 'module_info'/1]
#   attributes [% Line 1
#               'file' =
#                   % Line 1
#                   [{"lib/foo.ex", 1}],
#               % Line 1
#               'compile' =
#                   % Line 1
#                   ['no_auto_import'],
#               % Line 1
#               'spec' =
#                   % Line 1
#                   [{{'__info__', 1},
#                     [{'type', 1, 'fun',
#                       [{'type', 1, 'product',
#                         [{'type', 1, 'union',
#                           [{'atom', 1, 'attributes'},
#                            {'atom', 1, 'compile'},
#                            {'atom', 1, 'functions'},
#                            {'atom', 1, 'macros'}, {'atom', 1, 'md5'},
#                            {'atom', 1, 'module'},
#                            {'atom', 1, 'deprecated'}]}]},
#                        {'type', 1, 'union',
#                         [{'type', 1, 'atom', []},
#                          {'type', 1, 'list',
#                           [{'type', 1, 'union',
#                             [{'type', 1, 'tuple',
#                               [{'type', 1, 'atom', []},
#                                {'type', 1, 'any', []}]},
#                              {'type', 1, 'tuple',
#                               [{'type', 1, 'atom', []},
#                                {'type', 1, 'byte', []},
#                                {'type', 1, 'integer', []}]}]}]}]}]}]}]]
#   '__info__'/1 =
#       fun (_@c0) ->
#           case _@c0 of
#             'module' when 'true' -> 'Elixir.Foo'
#             'functions' when 'true' -> [{'baz', 0}]
#             'macros' when 'true' -> []
#             'attributes' when 'true' ->
#                 call 'erlang':'get_module_info'('Elixir.Foo',
#                                                 'attributes')
#             'compile' when 'true' ->
#                 call 'erlang':'get_module_info'('Elixir.Foo',
#                                                 'compile')
#             'md5' when 'true' ->
#                 call 'erlang':'get_module_info'('Elixir.Foo',
#                                                 'md5')
#             'deprecated' when 'true' -> []
#             _@c1 when 'true' ->
#                 primop 'match_fail'({'function_clause',
#                                      _@c1})
#           end
#   'baz'/0 =
#       % Line 2
#       fun () ->
#           % Line 3
#           'false'
#   'module_info'/0 =
#       fun () ->
#           call 'erlang':'get_module_info'('Elixir.Foo')
#   'module_info'/1 =
#       fun (_@c0) ->
#           call 'erlang':'get_module_info'('Elixir.Foo',
#                                           _@c0)
# end
:ok