gistfile1.txt

Regex for Floating Point, Hex Floating Point, Nan, and Infinity
 
    Digits = "(\\p{N}+)",
    HexDigits = "([0-9a-fA-F]+)",
    Exp = "[eE][+-]?" ++ Digits,
 
    FpRegexStr = "[\\x00-\\x20]*" ++ "[+-]?(" ++ "NaN|"
        ++ "Infinity|" ++ "((("
        ++ Digits
        ++ "(\\.)?("
        ++ Digits
        ++ "?)("
        ++ Exp
        ++ ")?)|"
        ++ "(\\.("
        ++ Digits
        ++ ")("
        ++ Exp
        ++ ")?)|"
        ++ "(("
        ++ "(0[xX]"
        ++ HexDigits
        ++ "(\\.)?)|"
        ++ "(0[xX]"
        ++ HexDigits
        ++ "?(\\.)"
        ++ HexDigits
        ++ ")"
        ++ ")[pP][+-]?" ++ Digits ++ "))" ++ "[fFdD]?))" ++ "[\\x00-\\x20]*"