prismjs/components/prism-kotlin.js

(function (Prism) {
	Prism.languages.kotlin = Prism.languages.extend('clike', {
		'keyword': {
			// The lookbehind prevents wrong highlighting of e.g. kotlin.properties.get
			pattern: /(^|[^.])\b(?:abstract|actual|annotation|as|break|by|catch|class|companion|const|constructor|continue|crossinline|data|do|dynamic|else|enum|expect|external|final|finally|for|fun|get|if|import|in|infix|init|inline|inner|interface|internal|is|lateinit|noinline|null|object|open|operator|out|override|package|private|protected|public|reified|return|sealed|set|super|suspend|tailrec|this|throw|to|try|typealias|val|var|vararg|when|where|while)\b/,
			lookbehind: true
		},
		'function': [
			{
				pattern: /(?:`[^\r\n`]+`|\b\w+)(?=\s*\()/,
				greedy: true
			},
			{
				pattern: /(\.)(?:`[^\r\n`]+`|\w+)(?=\s*\{)/,
				lookbehind: true,
				greedy: true
			}
		],
		'number': /\b(?:0[xX][\da-fA-F]+(?:_[\da-fA-F]+)*|0[bB][01]+(?:_[01]+)*|\d+(?:_\d+)*(?:\.\d+(?:_\d+)*)?(?:[eE][+-]?\d+(?:_\d+)*)?[fFL]?)\b/,
		'operator': /\+[+=]?|-[-=>]?|==?=?|!(?:!|==?)?|[\/*%<>]=?|[?:]:?|\.\.|&&|\|\||\b(?:and|inv|or|shl|shr|ushr|xor)\b/
	});

	delete Prism.languages.kotlin['class-name'];

	var interpolationInside = {
		'interpolation-punctuation': {
			pattern: /^\$\{?|\}$/,
			alias: 'punctuation'
		},
		'expression': {
			pattern: /[\s\S]+/,
			inside: Prism.languages.kotlin
		}
	};

	Prism.languages.insertBefore('kotlin', 'string', {
		// https://kotlinlang.org/spec/expressions.html#string-interpolation-expressions
		'string-literal': [
			{
				pattern: /"""(?:[^$]|\$(?:(?!\{)|\{[^{}]*\}))*?"""/,
				alias: 'multiline',
				inside: {
					'interpolation': {
						pattern: /\$(?:[a-z_]\w*|\{[^{}]*\})/i,
						inside: interpolationInside
					},
					'string': /[\s\S]+/
				}
			},
			{
				pattern: /"(?:[^"\\\r\n$]|\\.|\$(?:(?!\{)|\{[^{}]*\}))*"/,
				alias: 'singleline',
				inside: {
					'interpolation': {
						pattern: /((?:^|[^\\])(?:\\{2})*)\$(?:[a-z_]\w*|\{[^{}]*\})/i,
						lookbehind: true,
						inside: interpolationInside
					},
					'string': /[\s\S]+/
				}
			}
		],
		'char': {
			// https://kotlinlang.org/spec/expressions.html#character-literals
			pattern: /'(?:[^'\\\r\n]|\\(?:.|u[a-fA-F0-9]{0,4}))'/,
			greedy: true
		}
	});

	delete Prism.languages.kotlin['string'];

	Prism.languages.insertBefore('kotlin', 'keyword', {
		'annotation': {
			pattern: /\B@(?:\w+:)?(?:[A-Z]\w*|\[[^\]]+\])/,
			alias: 'builtin'
		}
	});

	Prism.languages.insertBefore('kotlin', 'function', {
		'label': {
			pattern: /\b\w+@|@\w+\b/,
			alias: 'symbol'
		}
	});

	Prism.languages.kt = Prism.languages.kotlin;
	Prism.languages.kts = Prism.languages.kotlin;
}(Prism));