(objectivec) Handle multibyte character literals (#2268)

CHANGES.md

@@ -20,6 +20,7 @@ Improvements:
 - fix(parser): Look-ahead regex now work for end matches also (#2237) [Josh Goebel][]
 - fix(parser): Better errors when a language is missing (#2236) [Josh Goebel][]
 - fix(go): Fix escaped character literals (#2266) [David Benjamin][]
+- fix(objectivec): Handle multibyte character literals (#2268) [David Benjamin][]
 
 [Josh Goebel]: https://github.com/yyyc514
 [Liam Nobel]: https://github.com/liamnobel

src/languages/objectivec.js

@@ -53,17 +53,14 @@ function(hljs) {
       hljs.C_BLOCK_COMMENT_MODE,
       hljs.C_NUMBER_MODE,
       hljs.QUOTE_STRING_MODE,
+      hljs.APOS_STRING_MODE,
       {
         className: 'string',
         variants: [
           {
             begin: '@"', end: '"',
             illegal: '\\n',
             contains: [hljs.BACKSLASH_ESCAPE]
-          },
-          {
-            begin: '\'', end: '[^\\\\]\'',
-            illegal: '[^\\\\][^\']'
           }
         ]
       },

test/markup/objectivec/string-literals.expect.txt

@@ -0,0 +1,7 @@
+<span class="hljs-keyword">const</span> <span class="hljs-keyword">char</span> *str = <span class="hljs-string">"Regular \"quoted\" string\n"</span>;
+<span class="hljs-built_in">NSString</span> *nsstr = <span class="hljs-string">@"Obj-C \"quoted\" string\n"</span>;
+<span class="hljs-keyword">char</span> c = <span class="hljs-string">'c'</span>;
+<span class="hljs-keyword">char</span> c2 = <span class="hljs-string">'"'</span>;
+<span class="hljs-keyword">char</span> c3 = <span class="hljs-string">'\''</span>;
+<span class="hljs-keyword">char</span> c4 = <span class="hljs-string">'\n'</span>;
+<span class="hljs-keyword">int</span> multibyte_char = <span class="hljs-string">'abcd'</span>;

test/markup/objectivec/string-literals.txt

@@ -0,0 +1,7 @@
+const char *str = "Regular \"quoted\" string\n";
+NSString *nsstr = @"Obj-C \"quoted\" string\n";
+char c = 'c';
+char c2 = '"';
+char c3 = '\'';
+char c4 = '\n';
+int multibyte_char = 'abcd';