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kotlin.js
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kotlin.js
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// https://docs.oracle.com/javase/specs/jls/se15/html/jls-3.html#jls-3.10
var decimalDigits = '[0-9](_*[0-9])*';
var frac = `\\.(${decimalDigits})`;
var hexDigits = '[0-9a-fA-F](_*[0-9a-fA-F])*';
var NUMERIC = {
className: 'number',
variants: [
// DecimalFloatingPointLiteral
// including ExponentPart
{ begin: `(\\b(${decimalDigits})((${frac})|\\.)?|(${frac}))` +
`[eE][+-]?(${decimalDigits})[fFdD]?\\b` },
// excluding ExponentPart
{ begin: `\\b(${decimalDigits})((${frac})[fFdD]?\\b|\\.([fFdD]\\b)?)` },
{ begin: `(${frac})[fFdD]?\\b` },
{ begin: `\\b(${decimalDigits})[fFdD]\\b` },
// HexadecimalFloatingPointLiteral
{ begin: `\\b0[xX]((${hexDigits})\\.?|(${hexDigits})?\\.(${hexDigits}))` +
`[pP][+-]?(${decimalDigits})[fFdD]?\\b` },
// DecimalIntegerLiteral
{ begin: '\\b(0|[1-9](_*[0-9])*)[lL]?\\b' },
// HexIntegerLiteral
{ begin: `\\b0[xX](${hexDigits})[lL]?\\b` },
// OctalIntegerLiteral
{ begin: '\\b0(_*[0-7])*[lL]?\\b' },
// BinaryIntegerLiteral
{ begin: '\\b0[bB][01](_*[01])*[lL]?\\b' },
],
relevance: 0
};
/*
Language: Kotlin
Description: Kotlin is an OSS statically typed programming language that targets the JVM, Android, JavaScript and Native.
Author: Sergey Mashkov <cy6erGn0m@gmail.com>
Website: https://kotlinlang.org
Category: common
*/
function kotlin(hljs) {
const KEYWORDS = {
keyword:
'abstract as val var vararg get set class object open private protected public noinline '
+ 'crossinline dynamic final enum if else do while for when throw try catch finally '
+ 'import package is in fun override companion reified inline lateinit init '
+ 'interface annotation data sealed internal infix operator out by constructor super '
+ 'tailrec where const inner suspend typealias external expect actual',
built_in:
'Byte Short Char Int Long Boolean Float Double Void Unit Nothing',
literal:
'true false null'
};
const KEYWORDS_WITH_LABEL = {
className: 'keyword',
begin: /\b(break|continue|return|this)\b/,
starts: { contains: [
{
className: 'symbol',
begin: /@\w+/
}
] }
};
const LABEL = {
className: 'symbol',
begin: hljs.UNDERSCORE_IDENT_RE + '@'
};
// for string templates
const SUBST = {
className: 'subst',
begin: /\$\{/,
end: /\}/,
contains: [ hljs.C_NUMBER_MODE ]
};
const VARIABLE = {
className: 'variable',
begin: '\\$' + hljs.UNDERSCORE_IDENT_RE
};
const STRING = {
className: 'string',
variants: [
{
begin: '"""',
end: '"""(?=[^"])',
contains: [
VARIABLE,
SUBST
]
},
// Can't use built-in modes easily, as we want to use STRING in the meta
// context as 'meta-string' and there's no syntax to remove explicitly set
// classNames in built-in modes.
{
begin: '\'',
end: '\'',
illegal: /\n/,
contains: [ hljs.BACKSLASH_ESCAPE ]
},
{
begin: '"',
end: '"',
illegal: /\n/,
contains: [
hljs.BACKSLASH_ESCAPE,
VARIABLE,
SUBST
]
}
]
};
SUBST.contains.push(STRING);
const ANNOTATION_USE_SITE = {
className: 'meta',
begin: '@(?:file|property|field|get|set|receiver|param|setparam|delegate)\\s*:(?:\\s*' + hljs.UNDERSCORE_IDENT_RE + ')?'
};
const ANNOTATION = {
className: 'meta',
begin: '@' + hljs.UNDERSCORE_IDENT_RE,
contains: [
{
begin: /\(/,
end: /\)/,
contains: [
hljs.inherit(STRING, { className: 'string' }),
"self"
]
}
]
};
// https://kotlinlang.org/docs/reference/whatsnew11.html#underscores-in-numeric-literals
// According to the doc above, the number mode of kotlin is the same as java 8,
// so the code below is copied from java.js
const KOTLIN_NUMBER_MODE = NUMERIC;
const KOTLIN_NESTED_COMMENT = hljs.COMMENT(
'/\\*', '\\*/',
{ contains: [ hljs.C_BLOCK_COMMENT_MODE ] }
);
const KOTLIN_PAREN_TYPE = { variants: [
{
className: 'type',
begin: hljs.UNDERSCORE_IDENT_RE
},
{
begin: /\(/,
end: /\)/,
contains: [] // defined later
}
] };
const KOTLIN_PAREN_TYPE2 = KOTLIN_PAREN_TYPE;
KOTLIN_PAREN_TYPE2.variants[1].contains = [ KOTLIN_PAREN_TYPE ];
KOTLIN_PAREN_TYPE.variants[1].contains = [ KOTLIN_PAREN_TYPE2 ];
return {
name: 'Kotlin',
aliases: [
'kt',
'kts'
],
keywords: KEYWORDS,
contains: [
hljs.COMMENT(
'/\\*\\*',
'\\*/',
{
relevance: 0,
contains: [
{
className: 'doctag',
begin: '@[A-Za-z]+'
}
]
}
),
hljs.C_LINE_COMMENT_MODE,
KOTLIN_NESTED_COMMENT,
KEYWORDS_WITH_LABEL,
LABEL,
ANNOTATION_USE_SITE,
ANNOTATION,
{
className: 'function',
beginKeywords: 'fun',
end: '[(]|$',
returnBegin: true,
excludeEnd: true,
keywords: KEYWORDS,
relevance: 5,
contains: [
{
begin: hljs.UNDERSCORE_IDENT_RE + '\\s*\\(',
returnBegin: true,
relevance: 0,
contains: [ hljs.UNDERSCORE_TITLE_MODE ]
},
{
className: 'type',
begin: /</,
end: />/,
keywords: 'reified',
relevance: 0
},
{
className: 'params',
begin: /\(/,
end: /\)/,
endsParent: true,
keywords: KEYWORDS,
relevance: 0,
contains: [
{
begin: /:/,
end: /[=,\/]/,
endsWithParent: true,
contains: [
KOTLIN_PAREN_TYPE,
hljs.C_LINE_COMMENT_MODE,
KOTLIN_NESTED_COMMENT
],
relevance: 0
},
hljs.C_LINE_COMMENT_MODE,
KOTLIN_NESTED_COMMENT,
ANNOTATION_USE_SITE,
ANNOTATION,
STRING,
hljs.C_NUMBER_MODE
]
},
KOTLIN_NESTED_COMMENT
]
},
{
begin: [
/class|interface|trait/,
/\s+/,
hljs.UNDERSCORE_IDENT_RE
],
beginScope: {
3: "title.class"
},
keywords: 'class interface trait',
end: /[:\{(]|$/,
excludeEnd: true,
illegal: 'extends implements',
contains: [
{ beginKeywords: 'public protected internal private constructor' },
hljs.UNDERSCORE_TITLE_MODE,
{
className: 'type',
begin: /</,
end: />/,
excludeBegin: true,
excludeEnd: true,
relevance: 0
},
{
className: 'type',
begin: /[,:]\s*/,
end: /[<\(,){\s]|$/,
excludeBegin: true,
returnEnd: true
},
ANNOTATION_USE_SITE,
ANNOTATION
]
},
STRING,
{
className: 'meta',
begin: "^#!/usr/bin/env",
end: '$',
illegal: '\n'
},
KOTLIN_NUMBER_MODE
]
};
}
module.exports = kotlin;

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