Prism.languages.apl = {
  comment: /(?:⍝|#[! ]).*$/m,
  string: {
    pattern: /'(?:[^'\r\n]|'')*'/,
    greedy: true,
  },
  number:
    /¯?(?:\d*\.?\b\d+(?:e[+¯]?\d+)?|¯|∞)(?:j¯?(?:(?:\d+(?:\.\d+)?|\.\d+)(?:e[+¯]?\d+)?|¯|∞))?/i,
  statement: /:[A-Z][a-z][A-Za-z]*\b/,
  'system-function': {
    pattern: /⎕[A-Z]+/i,
    alias: 'function',
  },
  constant: /[⍬⌾#⎕⍞]/,
  function: /[-+×÷⌈⌊∣|⍳⍸?*⍟○!⌹<≤=>≥≠≡≢∊⍷∪∩~∨∧⍱⍲⍴,⍪⌽⊖⍉↑↓⊂⊃⊆⊇⌷⍋⍒⊤⊥⍕⍎⊣⊢⍁⍂≈⍯↗¤→]/,
  'monadic-operator': {
    pattern: /[\\\/⌿⍀¨⍨⌶&∥]/,
    alias: 'operator',
  },
  'dyadic-operator': {
    pattern: /[.⍣⍠⍤∘⌸@⌺⍥]/,
    alias: 'operator',
  },
  assignment: {
    pattern: /←/,
    alias: 'keyword',
  },
  punctuation: /[\[;\]()◇⋄]/,
  dfn: {
    pattern: /[{}⍺⍵⍶⍹∇⍫:]/,
    alias: 'builtin',
  },
};