Prism.languages.smalltalk = {
  comment: {
    pattern: /"(?:""|[^"])*"/,
    greedy: true,
  },
  char: {
    pattern: /\$./,
    greedy: true,
  },
  string: {
    pattern: /'(?:''|[^'])*'/,
    greedy: true,
  },
  symbol: /#[\da-z]+|#(?:-|([+\/\\*~<>=@%|&?!])\1?)|#(?=\()/i,
  'block-arguments': {
    pattern: /(\[\s*):[^\[|]*\|/,
    lookbehind: true,
    inside: {
      variable: /:[\da-z]+/i,
      punctuation: /\|/,
    },
  },
  'temporary-variables': {
    pattern: /\|[^|]+\|/,
    inside: {
      variable: /[\da-z]+/i,
      punctuation: /\|/,
    },
  },
  keyword: /\b(?:new|nil|self|super)\b/,
  boolean: /\b(?:false|true)\b/,
  number: [
    /\d+r-?[\dA-Z]+(?:\.[\dA-Z]+)?(?:e-?\d+)?/,
    /\b\d+(?:\.\d+)?(?:e-?\d+)?/,
  ],
  operator: /[<=]=?|:=|~[~=]|\/\/?|\\\\|>[>=]?|[!^+\-*&|,@]/,
  punctuation: /[.;:?\[\](){}]/,
};