Prism.languages.nim = {
  comment: /#.*/,
  // Double-quoted strings can be prefixed by an identifier (Generalized raw string literals)
  // Character literals are handled specifically to prevent issues with numeric type suffixes
  string: {
    pattern: /(?:(?:\b(?!\d)(?:\w|\\x[8-9a-fA-F][0-9a-fA-F])+)?(?:"""[\s\S]*?"""(?!")|"(?:\\[\s\S]|""|[^"\\])*")|'(?:\\(?:\d+|x[\da-fA-F]{2}|.)|[^'])')/,
    greedy: true,
  },
  // The negative look ahead prevents wrong highlighting of the .. operator
  number: /\b(?:0[xXoObB][\da-fA-F_]+|\d[\d_]*(?:(?!\.\.)\.[\d_]*)?(?:[eE][+-]?\d[\d_]*)?)(?:'?[iuf]\d*)?/,
  keyword: /\b(?:addr|as|asm|atomic|bind|block|break|case|cast|concept|const|continue|converter|defer|discard|distinct|do|elif|else|end|enum|except|export|finally|for|from|func|generic|if|import|include|interface|iterator|let|macro|method|mixin|nil|object|out|proc|ptr|raise|ref|return|static|template|try|tuple|type|using|var|when|while|with|without|yield)\b/,
  function: {
    pattern: /(?:(?!\d)(?:\w|\\x[8-9a-fA-F][0-9a-fA-F])+|`[^`\r\n]+`)\*?(?:\[[^\]]+\])?(?=\s*\()/,
    inside: {
      operator: /\*$/,
    },
  },
  // We don't want to highlight operators inside backticks
  ignore: {
    pattern: /`[^`\r\n]+`/,
    inside: {
      punctuation: /`/,
    },
  },
  operator: {
    // Look behind and look ahead prevent wrong highlighting of punctuations [. .] {. .} (. .)
    // but allow the slice operator .. to take precedence over them
    // One can define his own operators in Nim so all combination of operators might be an operator.
    pattern: /(^|[({\[](?=\.\.)|(?![({\[]\.).)(?:(?:[=+\-*\/<>@$~&%|!?^:\\]|\.\.|\.(?![)}\]]))+|\b(?:and|div|of|or|in|is|isnot|mod|not|notin|shl|shr|xor)\b)/m,
    lookbehind: true,
  },
  punctuation: /[({\[]\.|\.[)}\]]|[`(){}\[\],:]/,
};
