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388 lines
8.6 KiB
388 lines
8.6 KiB
/**
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* @param {string} value
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* @returns {RegExp}
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* */
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/**
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* @param {RegExp | string } re
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* @returns {string}
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*/
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function source(re) {
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if (!re) return null;
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if (typeof re === "string") return re;
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return re.source;
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}
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/**
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* @param {RegExp | string } re
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* @returns {string}
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*/
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function lookahead(re) {
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return concat('(?=', re, ')');
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}
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/**
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* @param {...(RegExp | string) } args
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* @returns {string}
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*/
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function concat(...args) {
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const joined = args.map((x) => source(x)).join("");
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return joined;
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}
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/*
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Language: Ruby
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Description: Ruby is a dynamic, open source programming language with a focus on simplicity and productivity.
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Website: https://www.ruby-lang.org/
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Author: Anton Kovalyov <anton@kovalyov.net>
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Contributors: 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>
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Category: common
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*/
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function ruby(hljs) {
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const RUBY_METHOD_RE = '([a-zA-Z_]\\w*[!?=]?|[-+~]@|<<|>>|=~|===?|<=>|[<>]=?|\\*\\*|[-/+%^&*~`|]|\\[\\]=?)';
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const RUBY_KEYWORDS = {
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keyword:
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'and then defined module in return redo if BEGIN retry end for self when ' +
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'next until do begin unless END rescue else break undef not super class case ' +
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'require yield alias while ensure elsif or include attr_reader attr_writer attr_accessor ' +
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'__FILE__',
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built_in: 'proc lambda',
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literal:
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'true false nil'
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};
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const YARDOCTAG = {
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className: 'doctag',
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begin: '@[A-Za-z]+'
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};
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const IRB_OBJECT = {
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begin: '#<',
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end: '>'
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};
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const COMMENT_MODES = [
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hljs.COMMENT(
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'#',
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'$',
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{
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contains: [ YARDOCTAG ]
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}
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),
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hljs.COMMENT(
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'^=begin',
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'^=end',
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{
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contains: [ YARDOCTAG ],
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relevance: 10
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}
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),
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hljs.COMMENT('^__END__', '\\n$')
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];
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const SUBST = {
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className: 'subst',
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begin: /#\{/,
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end: /\}/,
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keywords: RUBY_KEYWORDS
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};
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const STRING = {
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className: 'string',
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contains: [
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hljs.BACKSLASH_ESCAPE,
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SUBST
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],
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variants: [
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{
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begin: /'/,
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end: /'/
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},
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{
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begin: /"/,
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end: /"/
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},
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{
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begin: /`/,
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end: /`/
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},
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{
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begin: /%[qQwWx]?\(/,
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end: /\)/
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},
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{
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begin: /%[qQwWx]?\[/,
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end: /\]/
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},
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{
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begin: /%[qQwWx]?\{/,
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end: /\}/
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},
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{
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begin: /%[qQwWx]?</,
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end: />/
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},
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{
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begin: /%[qQwWx]?\//,
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end: /\//
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},
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{
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begin: /%[qQwWx]?%/,
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end: /%/
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},
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{
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begin: /%[qQwWx]?-/,
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end: /-/
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},
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{
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begin: /%[qQwWx]?\|/,
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end: /\|/
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},
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// in the following expressions, \B in the beginning suppresses recognition of ?-sequences
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// where ? is the last character of a preceding identifier, as in: `func?4`
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{
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begin: /\B\?(\\\d{1,3})/
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},
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{
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begin: /\B\?(\\x[A-Fa-f0-9]{1,2})/
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},
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{
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begin: /\B\?(\\u\{?[A-Fa-f0-9]{1,6}\}?)/
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},
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{
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begin: /\B\?(\\M-\\C-|\\M-\\c|\\c\\M-|\\M-|\\C-\\M-)[\x20-\x7e]/
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},
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{
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begin: /\B\?\\(c|C-)[\x20-\x7e]/
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},
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{
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begin: /\B\?\\?\S/
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},
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{ // heredocs
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begin: /<<[-~]?'?(\w+)\n(?:[^\n]*\n)*?\s*\1\b/,
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returnBegin: true,
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contains: [
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{
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begin: /<<[-~]?'?/
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},
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hljs.END_SAME_AS_BEGIN({
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begin: /(\w+)/,
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end: /(\w+)/,
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contains: [
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hljs.BACKSLASH_ESCAPE,
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SUBST
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]
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})
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]
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}
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]
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};
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// Ruby syntax is underdocumented, but this grammar seems to be accurate
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// as of version 2.7.2 (confirmed with (irb and `Ripper.sexp(...)`)
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// https://docs.ruby-lang.org/en/2.7.0/doc/syntax/literals_rdoc.html#label-Numbers
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const decimal = '[1-9](_?[0-9])*|0';
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const digits = '[0-9](_?[0-9])*';
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const NUMBER = {
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className: 'number',
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relevance: 0,
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variants: [
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// decimal integer/float, optionally exponential or rational, optionally imaginary
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{
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begin: `\\b(${decimal})(\\.(${digits}))?([eE][+-]?(${digits})|r)?i?\\b`
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},
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// explicit decimal/binary/octal/hexadecimal integer,
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// optionally rational and/or imaginary
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{
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begin: "\\b0[dD][0-9](_?[0-9])*r?i?\\b"
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},
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{
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begin: "\\b0[bB][0-1](_?[0-1])*r?i?\\b"
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},
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{
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begin: "\\b0[oO][0-7](_?[0-7])*r?i?\\b"
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},
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{
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begin: "\\b0[xX][0-9a-fA-F](_?[0-9a-fA-F])*r?i?\\b"
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},
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// 0-prefixed implicit octal integer, optionally rational and/or imaginary
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{
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begin: "\\b0(_?[0-7])+r?i?\\b"
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}
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]
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};
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const PARAMS = {
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className: 'params',
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begin: '\\(',
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end: '\\)',
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endsParent: true,
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keywords: RUBY_KEYWORDS
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};
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const RUBY_DEFAULT_CONTAINS = [
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STRING,
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{
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className: 'class',
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beginKeywords: 'class module',
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end: '$|;',
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illegal: /=/,
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contains: [
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hljs.inherit(hljs.TITLE_MODE, {
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begin: '[A-Za-z_]\\w*(::\\w+)*(\\?|!)?'
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}),
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{
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begin: '<\\s*',
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contains: [
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{
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begin: '(' + hljs.IDENT_RE + '::)?' + hljs.IDENT_RE,
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// we already get points for <, we don't need poitns
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// for the name also
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relevance: 0
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}
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]
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}
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].concat(COMMENT_MODES)
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},
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{
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className: 'function',
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// def method_name(
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// def method_name;
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// def method_name (end of line)
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begin: concat(/def\s+/, lookahead(RUBY_METHOD_RE + "\\s*(\\(|;|$)")),
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relevance: 0, // relevance comes from kewords
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keywords: "def",
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end: '$|;',
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contains: [
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hljs.inherit(hljs.TITLE_MODE, {
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begin: RUBY_METHOD_RE
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}),
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PARAMS
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].concat(COMMENT_MODES)
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},
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{
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// swallow namespace qualifiers before symbols
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begin: hljs.IDENT_RE + '::'
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},
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{
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className: 'symbol',
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begin: hljs.UNDERSCORE_IDENT_RE + '(!|\\?)?:',
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relevance: 0
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},
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{
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className: 'symbol',
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begin: ':(?!\\s)',
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contains: [
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STRING,
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{
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begin: RUBY_METHOD_RE
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}
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],
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relevance: 0
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},
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NUMBER,
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{
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// negative-look forward attemps to prevent false matches like:
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// @ident@ or $ident$ that might indicate this is not ruby at all
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className: "variable",
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begin: '(\\$\\W)|((\\$|@@?)(\\w+))(?=[^@$?])' + `(?![A-Za-z])(?![@$?'])`
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},
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{
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className: 'params',
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begin: /\|/,
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end: /\|/,
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relevance: 0, // this could be a lot of things (in other languages) other than params
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keywords: RUBY_KEYWORDS
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},
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{ // regexp container
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begin: '(' + hljs.RE_STARTERS_RE + '|unless)\\s*',
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keywords: 'unless',
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contains: [
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{
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className: 'regexp',
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contains: [
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hljs.BACKSLASH_ESCAPE,
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SUBST
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],
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illegal: /\n/,
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variants: [
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{
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begin: '/',
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end: '/[a-z]*'
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},
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{
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begin: /%r\{/,
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end: /\}[a-z]*/
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},
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{
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begin: '%r\\(',
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end: '\\)[a-z]*'
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},
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{
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begin: '%r!',
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end: '![a-z]*'
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},
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{
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begin: '%r\\[',
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end: '\\][a-z]*'
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}
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]
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}
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].concat(IRB_OBJECT, COMMENT_MODES),
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relevance: 0
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}
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].concat(IRB_OBJECT, COMMENT_MODES);
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SUBST.contains = RUBY_DEFAULT_CONTAINS;
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PARAMS.contains = RUBY_DEFAULT_CONTAINS;
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// >>
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// ?>
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const SIMPLE_PROMPT = "[>?]>";
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// irb(main):001:0>
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const DEFAULT_PROMPT = "[\\w#]+\\(\\w+\\):\\d+:\\d+>";
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const RVM_PROMPT = "(\\w+-)?\\d+\\.\\d+\\.\\d+(p\\d+)?[^\\d][^>]+>";
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const IRB_DEFAULT = [
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{
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begin: /^\s*=>/,
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starts: {
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end: '$',
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contains: RUBY_DEFAULT_CONTAINS
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}
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},
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{
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className: 'meta',
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begin: '^(' + SIMPLE_PROMPT + "|" + DEFAULT_PROMPT + '|' + RVM_PROMPT + ')(?=[ ])',
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starts: {
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end: '$',
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contains: RUBY_DEFAULT_CONTAINS
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}
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}
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];
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COMMENT_MODES.unshift(IRB_OBJECT);
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return {
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name: 'Ruby',
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aliases: [
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'rb',
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'gemspec',
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'podspec',
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'thor',
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'irb'
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],
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keywords: RUBY_KEYWORDS,
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illegal: /\/\*/,
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contains: [
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hljs.SHEBANG({
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binary: "ruby"
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})
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]
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.concat(IRB_DEFAULT)
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.concat(COMMENT_MODES)
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.concat(RUBY_DEFAULT_CONTAINS)
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};
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}
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module.exports = ruby;
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