C: Regexp optimisation + don't use captures if not needed

components/prism-c.js

@@ -1,32 +1,32 @@
 Prism.languages.c = Prism.languages.extend('clike', {
-	'keyword': /\b(_Alignas|_Alignof|_Atomic|_Bool|_Complex|_Generic|_Imaginary|_Noreturn|_Static_assert|_Thread_local|asm|typeof|inline|auto|break|case|char|const|continue|default|do|double|else|enum|extern|float|for|goto|if|int|long|register|return|short|signed|sizeof|static|struct|switch|typedef|union|unsigned|void|volatile|while)\b/,
-	'operator': /\-[>-]?|\+\+?|!=?|<<?=?|>>?=?|==?|&&?|\|?\||[~^%?*\/]/,
+	'keyword': /\b(?:_Alignas|_Alignof|_Atomic|_Bool|_Complex|_Generic|_Imaginary|_Noreturn|_Static_assert|_Thread_local|asm|typeof|inline|auto|break|case|char|const|continue|default|do|double|else|enum|extern|float|for|goto|if|int|long|register|return|short|signed|sizeof|static|struct|switch|typedef|union|unsigned|void|volatile|while)\b/,
+	'operator': /-[>-]?|\+\+?|!=?|<<?=?|>>?=?|==?|&&?|\|\|?|[~^%?*\/]/,
 	'number': /\b-?(?:0x[\da-f]+|\d*\.?\d+(?:e[+-]?\d+)?)[ful]*\b/i
 });
 
 Prism.languages.insertBefore('c', 'string', {
 	'macro': {
 		// allow for multiline macro definitions
 		// spaces after the # character compile fine with gcc
-		pattern: /(^\s*)#\s*[a-z]+([^\r\n\\]|\\.|\\(?:\r\n?|\n))*/im,
+		pattern: /(^\s*)#\s*[a-z]+(?:[^\r\n\\]|\\(?:\r\n|[\s\S]))*/im,
 		lookbehind: true,
 		alias: 'property',
 		inside: {
 			// highlight the path of the include statement as a string
 			'string': {
-				pattern: /(#\s*include\s*)(<.+?>|("|')(\\?.)+?\3)/,
+				pattern: /(#\s*include\s*)(?:<.+?>|("|')(?:\\?.)+?\2)/,
 				lookbehind: true
 			},
 			// highlight macro directives as keywords
 			'directive': {
-				pattern: /(#\s*)\b(define|defined|elif|else|endif|error|ifdef|ifndef|if|import|include|line|pragma|undef|using)\b/,
+				pattern: /(#\s*)\b(?:define|defined|elif|else|endif|error|ifdef|ifndef|if|import|include|line|pragma|undef|using)\b/,
 				lookbehind: true,
 				alias: 'keyword'
 			}
 		}
 	},
 	// highlight predefined macros as constants
-	'constant': /\b(__FILE__|__LINE__|__DATE__|__TIME__|__TIMESTAMP__|__func__|EOF|NULL|SEEK_CUR|SEEK_END|SEEK_SET|stdin|stdout|stderr)\b/
+	'constant': /\b(?:__FILE__|__LINE__|__DATE__|__TIME__|__TIMESTAMP__|__func__|EOF|NULL|SEEK_CUR|SEEK_END|SEEK_SET|stdin|stdout|stderr)\b/
 });
 
 delete Prism.languages.c['class-name'];