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312
book/node_modules/highlight.js/lib/languages/crystal.js
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312
book/node_modules/highlight.js/lib/languages/crystal.js
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/*
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Language: Crystal
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Author: TSUYUSATO Kitsune <make.just.on@gmail.com>
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Website: https://crystal-lang.org
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Category: system
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*/
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/** @type LanguageFn */
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function crystal(hljs) {
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const INT_SUFFIX = '(_?[ui](8|16|32|64|128))?';
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const FLOAT_SUFFIX = '(_?f(32|64))?';
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const CRYSTAL_IDENT_RE = '[a-zA-Z_]\\w*[!?=]?';
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const CRYSTAL_METHOD_RE = '[a-zA-Z_]\\w*[!?=]?|[-+~]@|<<|>>|[=!]~|===?|<=>|[<>]=?|\\*\\*|[-/+%^&*~|]|//|//=|&[-+*]=?|&\\*\\*|\\[\\][=?]?';
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const CRYSTAL_PATH_RE = '[A-Za-z_]\\w*(::\\w+)*(\\?|!)?';
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const CRYSTAL_KEYWORDS = {
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$pattern: CRYSTAL_IDENT_RE,
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keyword:
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'abstract alias annotation as as? asm begin break case class def do else elsif end ensure enum extend for fun if '
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+ 'include instance_sizeof is_a? lib macro module next nil? of out pointerof private protected rescue responds_to? '
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+ 'return require select self sizeof struct super then type typeof union uninitialized unless until verbatim when while with yield '
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+ '__DIR__ __END_LINE__ __FILE__ __LINE__',
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literal: 'false nil true'
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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: CRYSTAL_KEYWORDS
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};
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// borrowed from Ruby
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const VARIABLE = {
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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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const EXPANSION = {
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className: 'template-variable',
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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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keywords: CRYSTAL_KEYWORDS
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};
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function recursiveParen(begin, end) {
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const
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contains = [
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{
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begin: begin,
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end: end
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}
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];
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contains[0].contains = contains;
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return contains;
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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: '%[Qwi]?\\(',
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end: '\\)',
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contains: recursiveParen('\\(', '\\)')
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},
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{
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begin: '%[Qwi]?\\[',
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end: '\\]',
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contains: recursiveParen('\\[', '\\]')
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},
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{
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begin: '%[Qwi]?\\{',
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end: /\}/,
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contains: recursiveParen(/\{/, /\}/)
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},
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{
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begin: '%[Qwi]?<',
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end: '>',
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contains: recursiveParen('<', '>')
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},
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{
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begin: '%[Qwi]?\\|',
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end: '\\|'
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},
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{
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begin: /<<-\w+$/,
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end: /^\s*\w+$/
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}
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],
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relevance: 0
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};
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const Q_STRING = {
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className: 'string',
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variants: [
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{
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begin: '%q\\(',
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end: '\\)',
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contains: recursiveParen('\\(', '\\)')
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},
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{
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begin: '%q\\[',
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end: '\\]',
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contains: recursiveParen('\\[', '\\]')
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},
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{
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begin: '%q\\{',
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end: /\}/,
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contains: recursiveParen(/\{/, /\}/)
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},
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{
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begin: '%q<',
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end: '>',
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contains: recursiveParen('<', '>')
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},
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{
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begin: '%q\\|',
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end: '\\|'
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},
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{
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begin: /<<-'\w+'$/,
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end: /^\s*\w+$/
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}
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],
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relevance: 0
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};
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const REGEXP = {
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begin: '(?!%\\})(' + hljs.RE_STARTERS_RE + '|\\n|\\b(case|if|select|unless|until|when|while)\\b)\\s*',
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keywords: 'case if select unless until when while',
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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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variants: [
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{
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begin: '//[a-z]*',
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relevance: 0
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},
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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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}
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],
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relevance: 0
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};
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const REGEXP2 = {
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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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variants: [
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{
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begin: '%r\\(',
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end: '\\)',
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contains: recursiveParen('\\(', '\\)')
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},
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{
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begin: '%r\\[',
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end: '\\]',
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contains: recursiveParen('\\[', '\\]')
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},
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{
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begin: '%r\\{',
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end: /\}/,
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contains: recursiveParen(/\{/, /\}/)
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},
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{
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begin: '%r<',
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end: '>',
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contains: recursiveParen('<', '>')
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},
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{
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begin: '%r\\|',
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end: '\\|'
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}
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],
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relevance: 0
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};
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const ATTRIBUTE = {
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className: 'meta',
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begin: '@\\[',
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end: '\\]',
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contains: [ hljs.inherit(hljs.QUOTE_STRING_MODE, { className: 'string' }) ]
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};
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const CRYSTAL_DEFAULT_CONTAINS = [
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EXPANSION,
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STRING,
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Q_STRING,
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REGEXP2,
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REGEXP,
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ATTRIBUTE,
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VARIABLE,
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hljs.HASH_COMMENT_MODE,
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{
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className: 'class',
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beginKeywords: 'class module struct',
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end: '$|;',
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illegal: /=/,
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contains: [
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hljs.HASH_COMMENT_MODE,
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hljs.inherit(hljs.TITLE_MODE, { begin: CRYSTAL_PATH_RE }),
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{ // relevance booster for inheritance
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begin: '<' }
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]
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},
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{
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className: 'class',
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beginKeywords: 'lib enum union',
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end: '$|;',
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illegal: /=/,
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contains: [
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hljs.HASH_COMMENT_MODE,
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hljs.inherit(hljs.TITLE_MODE, { begin: CRYSTAL_PATH_RE })
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]
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},
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{
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beginKeywords: 'annotation',
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end: '$|;',
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illegal: /=/,
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contains: [
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hljs.HASH_COMMENT_MODE,
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hljs.inherit(hljs.TITLE_MODE, { begin: CRYSTAL_PATH_RE })
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],
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relevance: 2
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},
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{
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className: 'function',
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beginKeywords: 'def',
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end: /\B\b/,
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contains: [
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hljs.inherit(hljs.TITLE_MODE, {
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begin: CRYSTAL_METHOD_RE,
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endsParent: true
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})
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]
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},
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{
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className: 'function',
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beginKeywords: 'fun macro',
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end: /\B\b/,
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contains: [
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hljs.inherit(hljs.TITLE_MODE, {
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begin: CRYSTAL_METHOD_RE,
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endsParent: true
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})
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],
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relevance: 2
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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: ':',
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contains: [
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STRING,
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{ begin: CRYSTAL_METHOD_RE }
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],
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relevance: 0
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},
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{
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className: 'number',
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variants: [
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{ begin: '\\b0b([01_]+)' + INT_SUFFIX },
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{ begin: '\\b0o([0-7_]+)' + INT_SUFFIX },
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{ begin: '\\b0x([A-Fa-f0-9_]+)' + INT_SUFFIX },
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{ begin: '\\b([1-9][0-9_]*[0-9]|[0-9])(\\.[0-9][0-9_]*)?([eE]_?[-+]?[0-9_]*)?' + FLOAT_SUFFIX + '(?!_)' },
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{ begin: '\\b([1-9][0-9_]*|0)' + INT_SUFFIX }
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],
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relevance: 0
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}
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];
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SUBST.contains = CRYSTAL_DEFAULT_CONTAINS;
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EXPANSION.contains = CRYSTAL_DEFAULT_CONTAINS.slice(1); // without EXPANSION
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return {
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name: 'Crystal',
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aliases: [ 'cr' ],
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keywords: CRYSTAL_KEYWORDS,
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contains: CRYSTAL_DEFAULT_CONTAINS
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};
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}
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module.exports = crystal;
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