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* @param {string} value\n * @returns {RegExp}\n * */\n\n/**\n * @param {RegExp | string } re\n * @returns {string}\n */\nfunction source(re) {\n if (!re) return null;\n if (typeof re === \"string\") return re;\n\n return re.source;\n}\n\n/**\n * @param {RegExp | string } re\n * @returns {string}\n */\nfunction lookahead(re) {\n return concat('(?=', re, ')');\n}\n\n/**\n * @param {...(RegExp | string) } args\n * @returns {string}\n */\nfunction concat(...args) {\n const joined = args.map((x) => source(x)).join(\"\");\n return joined;\n}\n\n/*\nLanguage: Ruby\nDescription: Ruby is a dynamic, open source programming language with a focus on simplicity and productivity.\nWebsite: https://www.ruby-lang.org/\nAuthor: Anton Kovalyov <anton@kovalyov.net>\nContributors: Peter Leonov <gojpeg@yandex.ru>, Vasily Polovnyov <vast@whiteants.net>, Loren Segal <lsegal@soen.ca>, Pascal Hurni <phi@ruby-reactive.org>, Cedric Sohrauer <sohrauer@googlemail.com>\nCategory: common\n*/\n\nfunction ruby(hljs) {\n const RUBY_METHOD_RE = '([a-zA-Z_]\\\\w*[!?=]?|[-+~]@|<<|>>|=~|===?|<=>|[<>]=?|\\\\*\\\\*|[-/+%^&*~`|]|\\\\[\\\\]=?)';\n const RUBY_KEYWORDS = {\n keyword:\n 'and then defined module in return redo if BEGIN retry end for self when ' +\n 'next until do begin unless END rescue else break undef not super class case ' +\n 'require yield alias while ensure elsif or include attr_reader attr_writer attr_accessor ' +\n '__FILE__',\n built_in: 'proc lambda',\n literal:\n 'true false nil'\n };\n const YARDOCTAG = {\n className: 'doctag',\n begin: '@[A-Za-z]+'\n };\n const IRB_OBJECT = {\n begin: '#<',\n end: '>'\n };\n const COMMENT_MODES = [\n hljs.COMMENT(\n '#',\n '$',\n {\n contains: [ YARDOCTAG ]\n }\n ),\n hljs.COMMENT(\n '^=begin',\n '^=end',\n {\n contains: [ YARDOCTAG ],\n relevance: 10\n }\n ),\n hljs.COMMENT('^__END__', '\\\\n$')\n ];\n const SUBST = {\n className: 'subst',\n begin: /#\\{/,\n end: /\\}/,\n keywords: RUBY_KEYWORDS\n };\n const STRING = {\n className: 'string',\n contains: [\n hljs.BACKSLASH_ESCAPE,\n SUBST\n ],\n variants: [\n {\n begin: /'/,\n end: /'/\n },\n {\n begin: /\"/,\n end: /\"/\n },\n {\n begin: /`/,\n end: /`/\n },\n {\n begin: /%[qQwWx]?\\(/,\n end: /\\)/\n },\n {\n begin: /%[qQwWx]?\\[/,\n end: /\\]/\n },\n {\n begin: /%[qQwWx]?\\{/,\n end: /\\}/\n },\n {\n begin: /%[qQwWx]?</,\n end: />/\n },\n {\n begin: /%[qQwWx]?\\//,\n end: /\\//\n },\n {\n begin: /%[qQwWx]?%/,\n end: /%/\n },\n {\n begin: /%[qQwWx]?-/,\n end: /-/\n },\n {\n begin: /%[qQwWx]?\\|/,\n end: /\\|/\n },\n // in the following expressions, \\B in the beginning suppresses recognition of ?-sequences\n // where ? is the last character of a preceding identifier, as in: `func?4`\n {\n begin: /\\B\\?(\\\\\\d{1,3})/\n },\n {\n begin: /\\B\\?(\\\\x[A-Fa-f0-9]{1,2})/\n },\n {\n begin: /\\B\\?(\\\\u\\{?[A-Fa-f0-9]{1,6}\\}?)/\n },\n {\n begin: /\\B\\?(\\\\M-\\\\C-|\\\\M-\\\\c|\\\\c\\\\M-|\\\\M-|\\\\C-\\\\M-)[\\x20-\\x7e]/\n },\n {\n begin: /\\B\\?\\\\(c|C-)[\\x20-\\x7e]/\n 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\"\\\\b0[dD][0-9](_?[0-9])*r?i?\\\\b\"\n },\n {\n begin: \"\\\\b0[bB][0-1](_?[0-1])*r?i?\\\\b\"\n },\n {\n begin: \"\\\\b0[oO][0-7](_?[0-7])*r?i?\\\\b\"\n },\n {\n begin: \"\\\\b0[xX][0-9a-fA-F](_?[0-9a-fA-F])*r?i?\\\\b\"\n },\n\n // 0-prefixed implicit octal integer, optionally rational and/or imaginary\n {\n begin: \"\\\\b0(_?[0-7])+r?i?\\\\b\"\n }\n ]\n };\n\n const PARAMS = {\n className: 'params',\n begin: '\\\\(',\n end: '\\\\)',\n endsParent: true,\n keywords: RUBY_KEYWORDS\n };\n\n const RUBY_DEFAULT_CONTAINS = [\n STRING,\n {\n className: 'class',\n beginKeywords: 'class module',\n end: '$|;',\n illegal: /=/,\n contains: [\n hljs.inherit(hljs.TITLE_MODE, {\n begin: '[A-Za-z_]\\\\w*(::\\\\w+)*(\\\\?|!)?'\n }),\n {\n begin: '<\\\\s*',\n contains: [\n {\n begin: '(' + hljs.IDENT_RE + '::)?' + hljs.IDENT_RE,\n // we already get points for <, we don't need poitns\n // for the name also\n relevance: 0\n }\n ]\n }\n ].concat(COMMENT_MODES)\n },\n {\n className: 'function',\n // def method_name(\n // def method_name;\n // def method_name (end of line)\n begin: concat(/def\\s+/, lookahead(RUBY_METHOD_RE + \"\\\\s*(\\\\(|;|$)\")),\n relevance: 0, // relevance comes from kewords\n keywords: \"def\",\n end: '$|;',\n contains: [\n hljs.inherit(hljs.TITLE_MODE, {\n begin: RUBY_METHOD_RE\n }),\n PARAMS\n ].concat(COMMENT_MODES)\n },\n {\n // swallow namespace qualifiers before symbols\n begin: hljs.IDENT_RE + '::'\n },\n {\n className: 'symbol',\n begin: hljs.UNDERSCORE_IDENT_RE + '(!|\\\\?)?:',\n relevance: 0\n },\n {\n className: 'symbol',\n begin: ':(?!\\\\s)',\n contains: [\n STRING,\n {\n begin: RUBY_METHOD_RE\n }\n ],\n relevance: 0\n },\n NUMBER,\n {\n // negative-look forward attemps to prevent false matches like:\n // @ident@ or $ident$ that might indicate this is not ruby at all\n className: \"variable\",\n begin: '(\\\\$\\\\W)|((\\\\$|@@?)(\\\\w+))(?=[^@$?])' + `(?![A-Za-z])(?![@$?'])`\n },\n {\n className: 'params',\n begin: /\\|/,\n end: /\\|/,\n relevance: 0, // this could be a lot of things (in other languages) other than params\n keywords: RUBY_KEYWORDS\n },\n { // regexp container\n begin: '(' + hljs.RE_STARTERS_RE + '|unless)\\\\s*',\n keywords: 'unless',\n contains: [\n {\n className: 'regexp',\n contains: [\n hljs.BACKSLASH_ESCAPE,\n SUBST\n ],\n illegal: /\\n/,\n variants: [\n {\n begin: '/',\n end: '/[a-z]*'\n },\n {\n begin: /%r\\{/,\n end: /\\}[a-z]*/\n },\n {\n begin: '%r\\\\(',\n end: '\\\\)[a-z]*'\n },\n {\n begin: '%r!',\n end: '![a-z]*'\n },\n {\n begin: '%r\\\\[',\n end: '\\\\][a-z]*'\n }\n ]\n }\n ].concat(IRB_OBJECT, COMMENT_MODES),\n relevance: 0\n }\n ].concat(IRB_OBJECT, COMMENT_MODES);\n\n SUBST.contains = RUBY_DEFAULT_CONTAINS;\n PARAMS.contains = RUBY_DEFAULT_CONTAINS;\n\n // >>\n // ?>\n const SIMPLE_PROMPT = \"[>?]>\";\n // irb(main):001:0>\n const DEFAULT_PROMPT = \"[\\\\w#]+\\\\(\\\\w+\\\\):\\\\d+:\\\\d+>\";\n const RVM_PROMPT = \"(\\\\w+-)?\\\\d+\\\\.\\\\d+\\\\.\\\\d+(p\\\\d+)?[^\\\\d][^>]+>\";\n\n const IRB_DEFAULT = [\n {\n begin: /^\\s*=>/,\n starts: {\n end: '$',\n contains: RUBY_DEFAULT_CONTAINS\n }\n },\n {\n className: 'meta',\n begin: '^(' + SIMPLE_PROMPT + \"|\" + DEFAULT_PROMPT + '|' + RVM_PROMPT + ')(?=[ ])',\n starts: {\n end: '$',\n contains: RUBY_DEFAULT_CONTAINS\n }\n }\n ];\n\n COMMENT_MODES.unshift(IRB_OBJECT);\n\n return {\n name: 'Ruby',\n aliases: [\n 'rb',\n 'gemspec',\n 'podspec',\n 'thor',\n 'irb'\n ],\n keywords: RUBY_KEYWORDS,\n illegal: /\\/\\*/,\n contains: [\n hljs.SHEBANG({\n binary: \"ruby\"\n })\n ]\n .concat(IRB_DEFAULT)\n .concat(COMMENT_MODES)\n .concat(RUBY_DEFAULT_CONTAINS)\n };\n}\n\nmodule.exports = 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