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<!doctype html>

<title>CodeMirror: Erlang mode</title>
<meta charset="utf-8"/>
<link rel=stylesheet href="../../doc/docs.css">

<link rel="stylesheet" href="../../lib/codemirror.css">
<link rel="stylesheet" href="../../theme/erlang-dark.css">
<script src="../../lib/codemirror.js"></script>
<script src="../../addon/edit/matchbrackets.js"></script>
<script src="erlang.js"></script>
<style>.CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}</style>
<div id=nav>
  <a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>

  <ul>
    <li><a href="../../index.html">Home</a>
    <li><a href="../../doc/manual.html">Manual</a>
    <li><a href="https://github.com/codemirror/codemirror">Code</a>
  </ul>
  <ul>
    <li><a href="../index.html">Language modes</a>
    <li><a class=active href="#">Erlang</a>
  </ul>
</div>

<article>
<h2>Erlang mode</h2>
<form><textarea id="code" name="code">
%% -*- mode: erlang; erlang-indent-level: 2 -*-
%%% Created :  7 May 2012 by mats cronqvist <masse@klarna.com>

%% @doc
%% Demonstrates how to print a record.
%% @end

-module('ex').
-author('mats cronqvist').
-export([demo/0,
         rec_info/1]).

-record(demo,{a="One",b="Two",c="Three",d="Four"}).

rec_info(demo) -> record_info(fields,demo).

demo() -> expand_recs(?MODULE,#demo{a="A",b="BB"}).

expand_recs(M,List) when is_list(List) ->
  [expand_recs(M,L)||L<-List];
expand_recs(M,Tup) when is_tuple(Tup) ->
  case tuple_size(Tup) of
    L when L < 1 -> Tup;
    L ->
      try
        Fields = M:rec_info(element(1,Tup)),
        L = length(Fields)+1,
        lists:zip(Fields,expand_recs(M,tl(tuple_to_list(Tup))))
      catch
        _:_ -> list_to_tuple(expand_recs(M,tuple_to_list(Tup)))
      end
  end;
expand_recs(_,Term) ->
  Term.
</textarea></form>

    <script>
      var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
        lineNumbers: true,
        matchBrackets: true,
        extraKeys: {"Tab":  "indentAuto"},
        theme: "erlang-dark"
      });
    </script>

    <p><strong>MIME types defined:</strong> <code>text/x-erlang</code>.</p>
  </article>