enh(elixir) Improves and fixes many issues with Elixir grammar

src/languages/elixir.js

@@ -13,46 +13,45 @@ export default function(hljs) {
   const ELIXIR_IDENT_RE = '[a-zA-Z_][a-zA-Z0-9_.]*(!|\\?)?';
   const ELIXIR_METHOD_RE = '[a-zA-Z_]\\w*[!?=]?|[-+~]@|<<|>>|=~|===?|<=>|[<>]=?|\\*\\*|[-/+%^&*~`|]|\\[\\]=?';
   const KEYWORDS = [
-    "alias",
+    "after",
     "alias",
     "and",
-    "begin",
-    "break",
     "case",
+    "catch",
     "cond",
-    "defined",
+    "defstruct",
     "do",
+    "else",
     "end",
-    "ensure",
-    "false",
     "fn",
     "for",
+    "if",
     "import",
     "in",
-    "include",
-    "module",
-    "next",
-    "nil",
     "not",
     "or",
     "quote",
-    "redo",
+    "raise",
+    "receive",
     "require",
-    "retry",
-    "return",
-    "self",
-    "then",
-    "true",
+    "reraise",
+    "rescue",
+    "try",
     "unless",
-    "until",
+    "unquote",
+    "unquote_splicing",
     "use",
-    "when",
-    "while",
     "with|0"
   ];
+  const LITERALS = [
+    "false",
+    "nil",
+    "true"
+  ];
   const KWS = {
     $pattern: ELIXIR_IDENT_RE,
-    keyword: KEYWORDS
+    keyword: KEYWORDS,
+    literal: LITERALS
   };
   const SUBST = {
     className: 'subst',
@@ -62,7 +61,7 @@ export default function(hljs) {
   };
   const NUMBER = {
     className: 'number',
-    begin: '(\\b0o[0-7_]+)|(\\b0b[01_]+)|(\\b0x[0-9a-fA-F_]+)|(-?\\b[1-9][0-9_]*(\\.[0-9_]+([eE][-+]?[0-9]+)?)?)',
+    begin: '(\\b0o[0-7_]+)|(\\b0b[01_]+)|(\\b0x[0-9a-fA-F_]+)|(-?\\b[0-9][0-9_]*(\\.[0-9_]+([eE][-+]?[0-9]+)?)?)',
     relevance: 0
   };
   // TODO: could be tightened
@@ -232,19 +231,13 @@ export default function(hljs) {
     beginKeywords: 'defimpl defmodule defprotocol defrecord',
     end: /\bdo\b|$|;/
   });
-  const DEFSTRUCT = {
-    className: 'class',
-    beginKeywords: 'defstruct'
-    // ends immediately
-  };
   const ELIXIR_DEFAULT_CONTAINS = [
     STRING,
     REGEX_SIGIL,
     UPCASE_SIGIL,
     LOWERCASE_SIGIL,
     hljs.HASH_COMMENT_MODE,
     CLASS,
-    DEFSTRUCT,
     FUNCTION,
     {
       begin: '::'
@@ -278,6 +271,7 @@ export default function(hljs) {
 
   return {
     name: 'Elixir',
+    aliases: ['ex', 'exs'],
     keywords: KWS,
     contains: ELIXIR_DEFAULT_CONTAINS
   };

test/markup/elixir/conditionals.expect.txt

@@ -0,0 +1,40 @@
+<span class="hljs-keyword">case</span> x <span class="hljs-keyword">do</span>
+  <span class="hljs-number">1</span> -&gt; <span class="hljs-symbol">:one</span>
+  <span class="hljs-number">2</span> -&gt; <span class="hljs-symbol">:two</span>
+  _ -&gt; <span class="hljs-symbol">:error</span>
+<span class="hljs-keyword">end</span>
+
+<span class="hljs-keyword">cond</span> <span class="hljs-keyword">do</span>
+  x &gt; <span class="hljs-number">30</span> -&gt; <span class="hljs-symbol">:ok</span>
+  y &lt;= <span class="hljs-number">7</span> -&gt; <span class="hljs-symbol">:maybe</span>
+  z == <span class="hljs-symbol">:skip</span> -&gt; <span class="hljs-symbol">:ok</span>
+  <span class="hljs-literal">true</span> -&gt; <span class="hljs-symbol">:error</span>
+<span class="hljs-keyword">end</span>
+
+<span class="hljs-keyword">if</span> x &gt; <span class="hljs-number">4</span> <span class="hljs-keyword">do</span>
+  <span class="hljs-symbol">:ok</span>
+<span class="hljs-keyword">end</span>
+
+<span class="hljs-keyword">if</span> x &gt; <span class="hljs-number">4</span>, <span class="hljs-symbol">do:</span> <span class="hljs-symbol">:ok</span>
+
+<span class="hljs-keyword">if</span> x &gt; <span class="hljs-number">4</span> <span class="hljs-keyword">do</span>
+  <span class="hljs-symbol">:ok</span>
+<span class="hljs-keyword">else</span>
+  <span class="hljs-symbol">:error</span>
+<span class="hljs-keyword">end</span>
+
+<span class="hljs-keyword">if</span> x &gt; <span class="hljs-number">4</span>, <span class="hljs-symbol">do:</span> <span class="hljs-symbol">:ok</span>, <span class="hljs-symbol">else:</span> <span class="hljs-symbol">:error</span>
+
+<span class="hljs-keyword">unless</span> y &lt; <span class="hljs-number">50</span> <span class="hljs-keyword">do</span>
+  <span class="hljs-symbol">:error</span>
+<span class="hljs-keyword">end</span>
+
+<span class="hljs-keyword">unless</span> y &lt; <span class="hljs-number">50</span>, <span class="hljs-symbol">do:</span> <span class="hljs-symbol">:error</span>
+
+<span class="hljs-keyword">unless</span> y &lt; <span class="hljs-number">50</span> <span class="hljs-keyword">do</span>
+  <span class="hljs-symbol">:error</span>
+<span class="hljs-keyword">else</span>
+  <span class="hljs-symbol">:ok</span>
+<span class="hljs-keyword">end</span>
+
+<span class="hljs-keyword">unless</span> y &lt; <span class="hljs-number">50</span>, <span class="hljs-symbol">do:</span> <span class="hljs-symbol">:error</span>, <span class="hljs-symbol">else:</span> <span class="hljs-symbol">:ok</span>

test/markup/elixir/conditionals.txt

@@ -0,0 +1,40 @@
+case x do
+  1 -> :one
+  2 -> :two
+  _ -> :error
+end
+
+cond do
+  x > 30 -> :ok
+  y <= 7 -> :maybe
+  z == :skip -> :ok
+  true -> :error
+end
+
+if x > 4 do
+  :ok
+end
+
+if x > 4, do: :ok
+
+if x > 4 do
+  :ok
+else
+  :error
+end
+
+if x > 4, do: :ok, else: :error
+
+unless y < 50 do
+  :error
+end
+
+unless y < 50, do: :error
+
+unless y < 50 do
+  :error
+else
+  :ok
+end
+
+unless y < 50, do: :error, else: :ok

test/markup/elixir/function-title.expect.txt

@@ -12,7 +12,7 @@
 
 <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">f!</span></span>, <span class="hljs-symbol">do:</span> IO.puts <span class="hljs-string">&quot;hello world&quot;</span>
 
-<span class="hljs-function"><span class="hljs-keyword">defp</span> <span class="hljs-title">f?</span></span>, <span class="hljs-symbol">do:</span> <span class="hljs-keyword">true</span>
+<span class="hljs-function"><span class="hljs-keyword">defp</span> <span class="hljs-title">f?</span></span>, <span class="hljs-symbol">do:</span> <span class="hljs-literal">true</span>
 
 <span class="hljs-function"><span class="hljs-keyword">defmacro</span> <span class="hljs-title">foo</span></span>, <span class="hljs-symbol">do:</span> <span class="hljs-symbol">:ok</span>
 

test/markup/elixir/modules.expect.txt

@@ -1,5 +1,5 @@
 <span class="hljs-class"><span class="hljs-keyword">defmodule</span> <span class="hljs-title">User</span></span> <span class="hljs-keyword">do</span>
-  <span class="hljs-class"><span class="hljs-keyword">defstruct</span></span> [<span class="hljs-symbol">:name</span>, <span class="hljs-symbol">:email</span>, <span class="hljs-symbol">age:</span> <span class="hljs-number">18</span>]
+  <span class="hljs-keyword">defstruct</span> [<span class="hljs-symbol">:name</span>, <span class="hljs-symbol">:email</span>, <span class="hljs-symbol">age:</span> <span class="hljs-number">18</span>]
 <span class="hljs-keyword">end</span>
 
 <span class="hljs-class"><span class="hljs-keyword">defprotocol</span> <span class="hljs-title">Size</span></span> <span class="hljs-keyword">do</span>

test/markup/elixir/numbers.expect.txt

@@ -1,14 +1,21 @@
 integer = <span class="hljs-number">1234</span>
+integer_with_leading_zero = <span class="hljs-number">01234</span>
+integer_zero = <span class="hljs-number">0</span>
 big_integer = <span class="hljs-number">1_234_000</span>
 neg_integer = <span class="hljs-number">-20_000</span>
 float = <span class="hljs-number">2.34</span>
+float_with_leading_zero = <span class="hljs-number">0.34</span>
+float_zero = <span class="hljs-number">0.0</span>
 sci_float = <span class="hljs-number">2.4e23</span>
 plus_sci_float = <span class="hljs-number">2.4e+23</span>
 small_sci_float = <span class="hljs-number">2.4e-23</span>
 cap_sci_float = <span class="hljs-number">2.4E23</span>
 binary = <span class="hljs-number">0b1010</span>
+binary_with_leading_zero = <span class="hljs-number">0b0010</span>
 strange_binary = <span class="hljs-number">0b1010_1010_1010</span>
 octal = <span class="hljs-number">0o777</span>
+octal_with_leading_zero = <span class="hljs-number">0o077</span>
 strange_octal = <span class="hljs-number">0o777_666_555</span>
 hex = <span class="hljs-number">0x1ABEF</span>
+hex_with_leading_zero = <span class="hljs-number">0x0ABEF</span>
 strange_hex = <span class="hljs-number">0x1234_FACE_987D</span>

test/markup/elixir/numbers.txt

@@ -1,14 +1,21 @@
 integer = 1234
+integer_with_leading_zero = 01234
+integer_zero = 0
 big_integer = 1_234_000
 neg_integer = -20_000
 float = 2.34
+float_with_leading_zero = 0.34
+float_zero = 0.0
 sci_float = 2.4e23
 plus_sci_float = 2.4e+23
 small_sci_float = 2.4e-23
 cap_sci_float = 2.4E23
 binary = 0b1010
+binary_with_leading_zero = 0b0010
 strange_binary = 0b1010_1010_1010
 octal = 0o777
+octal_with_leading_zero = 0o077
 strange_octal = 0o777_666_555
 hex = 0x1ABEF
+hex_with_leading_zero = 0x0ABEF
 strange_hex = 0x1234_FACE_987D