reprism/src/languages/fsharp.js

Modular Syntax highlighting for the web

export default {
  language: 'fsharp',
  init: Prism => {
    Prism.languages.fsharp = Prism.languages.extend('clike', {
      comment: [
        {
          pattern: /(^|[^\\])\(\*[\s\S]*?\*\)/,
          lookbehind: true,
        },
        {
          pattern: /(^|[^\\:])\/\/.*/,
          lookbehind: true,
        },
      ],
      keyword: /\b(?:let|return|use|yield)(?:!\B|\b)|\b(abstract|and|as|assert|base|begin|class|default|delegate|do|done|downcast|downto|elif|else|end|exception|extern|false|finally|for|fun|function|global|if|in|inherit|inline|interface|internal|lazy|match|member|module|mutable|namespace|new|not|null|of|open|or|override|private|public|rec|select|static|struct|then|to|true|try|type|upcast|val|void|when|while|with|asr|land|lor|lsl|lsr|lxor|mod|sig|atomic|break|checked|component|const|constraint|constructor|continue|eager|event|external|fixed|functor|include|method|mixin|object|parallel|process|protected|pure|sealed|tailcall|trait|virtual|volatile)\b/,
      string: {
        pattern: /(?:"""[\s\S]*?"""|@"(?:""|[^"])*"|("|')(?:\\[\s\S]|(?!\1)[^\\])*\1)B?/,
        greedy: true,
      },
      number: [
        /\b0x[\da-fA-F]+(?:un|lf|LF)?\b/,
        /\b0b[01]+(?:y|uy)?\b/,
        /(?:\b\d+\.?\d*|\B\.\d+)(?:[fm]|e[+-]?\d+)?\b/i,
        /\b\d+(?:[IlLsy]|u[lsy]?|UL)?\b/,
      ],
    })
    Prism.languages.insertBefore('fsharp', 'keyword', {
      preprocessor: {
        pattern: /^[^\r\n\S]*#.*/m,
        alias: 'property',
        inside: {
          directive: {
            pattern: /(\s*#)\b(?:else|endif|if|light|line|nowarn)\b/,
            lookbehind: true,
            alias: 'keyword',
          },
        },
      },
    })
  },
}