Prism.languages.d = Prism.languages.extend('clike', {
  string: [
    // r"", x""
    /\b[rx]"(?:\\[\s\S]|[^\\"])*"[cwd]?/,
    // q"[]", q"()", q"<>", q"{}"
    /\bq"(?:\[[\s\S]*?\]|\([\s\S]*?\)|<[\s\S]*?>|\{[\s\S]*?\})"/,
    // q"IDENT
    // ...
    // IDENT"
    /\bq"([_a-zA-Z][_a-zA-Z\d]*)(?:\r?\n|\r)[\s\S]*?(?:\r?\n|\r)\1"/,
    // q"//", q"||", etc.
    /\bq"(.)[\s\S]*?\1"/,
    // Characters
    /'(?:\\'|\\?[^']+)'/,

    /(["`])(?:\\[\s\S]|(?!\1)[^\\])*\1[cwd]?/,
  ],

  number: [
    // The lookbehind and the negative look-ahead try to prevent bad highlighting of the .. operator
    // Hexadecimal numbers must be handled separately to avoid problems with exponent "e"
    /\b0x\.?[a-f\d_]+(?:(?!\.\.)\.[a-f\d_]*)?(?:p[+-]?[a-f\d_]+)?[ulfi]*/i,
    {
      pattern: /((?:\.\.)?)(?:\b0b\.?|\b|\.)\d[\d_]*(?:(?!\.\.)\.[\d_]*)?(?:e[+-]?\d[\d_]*)?[ulfi]*/i,
      lookbehind: true,
    },
  ],

  // In order: $, keywords and special tokens, globally defined symbols
  keyword: /\$|\b(?:abstract|alias|align|asm|assert|auto|body|bool|break|byte|case|cast|catch|cdouble|cent|cfloat|char|class|const|continue|creal|dchar|debug|default|delegate|delete|deprecated|do|double|else|enum|export|extern|false|final|finally|float|for|foreach|foreach_reverse|function|goto|idouble|if|ifloat|immutable|import|inout|int|interface|invariant|ireal|lazy|long|macro|mixin|module|new|nothrow|null|out|override|package|pragma|private|protected|public|pure|real|ref|return|scope|shared|short|static|struct|super|switch|synchronized|template|this|throw|true|try|typedef|typeid|typeof|ubyte|ucent|uint|ulong|union|unittest|ushort|version|void|volatile|wchar|while|with|__(?:(?:FILE|MODULE|LINE|FUNCTION|PRETTY_FUNCTION|DATE|EOF|TIME|TIMESTAMP|VENDOR|VERSION)__|gshared|traits|vector|parameters)|string|wstring|dstring|size_t|ptrdiff_t)\b/,
  operator: /\|[|=]?|&[&=]?|\+[+=]?|-[-=]?|\.?\.\.|=[>=]?|!(?:i[ns]\b|<>?=?|>=?|=)?|\bi[ns]\b|(?:<[<>]?|>>?>?|\^\^|[*\/%^~])=?/,
});

Prism.languages.d.comment = [
  // Shebang
  /^\s*#!.+/,
  // /+ +/
  {
    // Allow one level of nesting
    pattern: /(^|[^\\])\/\+(?:\/\+[\s\S]*?\+\/|[\s\S])*?\+\//,
    lookbehind: true,
  },
].concat(Prism.languages.d.comment);

Prism.languages.insertBefore('d', 'comment', {
  'token-string': {
    // Allow one level of nesting
    pattern: /\bq\{(?:\{[^}]*\}|[^}])*\}/,
    alias: 'string',
  },
});

Prism.languages.insertBefore('d', 'keyword', {
  property: /\B@\w*/,
});

Prism.languages.insertBefore('d', 'function', {
  register: {
    // Iasm registers
    pattern: /\b(?:[ABCD][LHX]|E[ABCD]X|E?(?:BP|SP|DI|SI)|[ECSDGF]S|CR[0234]|DR[012367]|TR[3-7]|X?MM[0-7]|R[ABCD]X|[BS]PL|R[BS]P|[DS]IL|R[DS]I|R(?:[89]|1[0-5])[BWD]?|XMM(?:[89]|1[0-5])|YMM(?:1[0-5]|\d))\b|\bST(?:\([0-7]\)|\b)/,
    alias: 'variable',
  },
});
