reprism/src/languages/kotlin.js

Modular Syntax highlighting for the web

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

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

      Prism.languages.insertBefore('kotlin', 'string', {
        'raw-string': {
          pattern: /("""|''')[\s\S]*?\1/,
          alias: 'string',
          // See interpolation below
        },
      })
      Prism.languages.insertBefore('kotlin', 'keyword', {
        annotation: {
          pattern: /\B@(?:\w+:)?(?:[A-Z]\w*|\[[^\]]+\])/,
          alias: 'builtin',
        },
      })
      Prism.languages.insertBefore('kotlin', 'function', {
        label: {
          pattern: /\w+@|@\w+/,
          alias: 'symbol',
        },
      })

      const interpolation = [
        {
          pattern: /\$\{[^}]+\}/,
          inside: {
            delimiter: {
              pattern: /^\$\{|\}$/,
              alias: 'variable',
            },
            rest: Prism.languages.kotlin,
          },
        },
        {
          pattern: /\$\w+/,
          alias: 'variable',
        },
      ]

      Prism.languages.kotlin.string.inside = Prism.languages.kotlin[
        'raw-string'
      ].inside = {
        interpolation,
      }
    }(Prism))
  },
}