Prism.languages.scala = Prism.languages.extend('java', {
  'triple-quoted-string': {
    pattern: /"""[\s\S]*?"""/,
    greedy: true,
    alias: 'string',
  },
  string: {
    pattern: /("|')(?:\\.|(?!\1)[^\\\r\n])*\1/,
    greedy: true,
  },
  keyword:
    /<-|=>|\b(?:abstract|case|catch|class|def|derives|do|else|enum|extends|extension|final|finally|for|forSome|given|if|implicit|import|infix|inline|lazy|match|new|null|object|opaque|open|override|package|private|protected|return|sealed|self|super|this|throw|trait|transparent|try|type|using|val|var|while|with|yield)\b/,
  number:
    /\b0x(?:[\da-f]*\.)?[\da-f]+|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e\d+)?[dfl]?/i,
  builtin:
    /\b(?:Any|AnyRef|AnyVal|Boolean|Byte|Char|Double|Float|Int|Long|Nothing|Short|String|Unit)\b/,
  symbol: /'[^\d\s\\]\w*/,
});

Prism.languages.insertBefore('scala', 'triple-quoted-string', {
  'string-interpolation': {
    pattern:
      /\b[a-z]\w*(?:"""(?:[^$]|\$(?:[^{]|\{(?:[^{}]|\{[^{}]*\})*\}))*?"""|"(?:[^$"\r\n]|\$(?:[^{]|\{(?:[^{}]|\{[^{}]*\})*\}))*")/i,
    greedy: true,
    inside: {
      id: {
        pattern: /^\w+/,
        greedy: true,
        alias: 'function',
      },
      escape: {
        pattern: /\\\$"|\$[$"]/,
        greedy: true,
        alias: 'symbol',
      },
      interpolation: {
        pattern: /\$(?:\w+|\{(?:[^{}]|\{[^{}]*\})*\})/,
        greedy: true,
        inside: {
          punctuation: /^\$\{?|\}$/,
          expression: {
            pattern: /[\s\S]+/,
            inside: Prism.languages.scala,
          },
        },
      },
      string: /[\s\S]+/,
    },
  },
});

delete Prism.languages.scala['class-name'];
delete Prism.languages.scala['function'];
delete Prism.languages.scala['constant'];