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