Prism.languages.fortran = {
  'quoted-number': { pattern: /[BOZ](['"])[A-F0-9]+\1/i, alias: 'number' },
  string: {
    pattern:
      /(?:\b\w+_)?(['"])(?:\1\1|&(?:\r\n?|\n)(?:[ \t]*!.*(?:\r\n?|\n)|(?![ \t]*!))|(?!\1).)*(?:\1|&)/,
    inside: { comment: { pattern: /(&(?:\r\n?|\n)\s*)!.*/, lookbehind: !0 } },
  },
  comment: { pattern: /!.*/, greedy: !0 },
  boolean: /\.(?:FALSE|TRUE)\.(?:_\w+)?/i,
  number: /(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:[ED][+-]?\d+)?(?:_\w+)?/i,
  keyword: [
    /\b(?:CHARACTER|COMPLEX|DOUBLE ?PRECISION|INTEGER|LOGICAL|REAL)\b/i,
    /\b(?:END ?)?(?:BLOCK ?DATA|DO|FILE|FORALL|FUNCTION|IF|INTERFACE|MODULE(?! PROCEDURE)|PROGRAM|SELECT|SUBROUTINE|TYPE|WHERE)\b/i,
    /\b(?:ALLOCATABLE|ALLOCATE|BACKSPACE|CALL|CASE|CLOSE|COMMON|CONTAINS|CONTINUE|CYCLE|DATA|DEALLOCATE|DIMENSION|DO|END|EQUIVALENCE|EXIT|EXTERNAL|FORMAT|GO ?TO|IMPLICIT(?: NONE)?|INQUIRE|INTENT|INTRINSIC|MODULE PROCEDURE|NAMELIST|NULLIFY|OPEN|OPTIONAL|PARAMETER|POINTER|PRINT|PRIVATE|PUBLIC|READ|RETURN|REWIND|SAVE|SELECT|STOP|TARGET|WHILE|WRITE)\b/i,
    /\b(?:ASSIGNMENT|DEFAULT|ELEMENTAL|ELSE|ELSEIF|ELSEWHERE|ENTRY|IN|INCLUDE|INOUT|KIND|NULL|ONLY|OPERATOR|OUT|PURE|RECURSIVE|RESULT|SEQUENCE|STAT|THEN|USE)\b/i,
  ],
  operator: [
    /\*\*|\/\/|=>|[=\/]=|[<>]=?|::|[+\-*=%]|\.[A-Z]+\./i,
    { pattern: /(^|(?!\().)\/(?!\))/, lookbehind: !0 },
  ],
  punctuation: /\(\/|\/\)|[(),;:&]/,
};