.  #              any character (including \n) alias [\w\W] alias [\s\S] alias [\d\D] alias \p{All}
#        (/m)  with ^ and $ matching start and end of line
#        (/s)  with . matching \n

#              any character (including \n) alias [\w\W] alias [\s\S] alias [\d\D] alias \p{All}


#              address=/15/C1/C0 
#              xRe::Token::Assertion
#              simple zero-width assertion (zero-length, between pos()itions)
#              match the beginning of the string
              "^",


#              address=/15/C1/C2 
#              xRe::Token::Assertion
#              simple zero-width assertion (zero-length, between pos()itions)
#              match before an optional \n, and the end of the string
              "\$",
              


#              xRe::Token::Assertion
#              simple zero-width assertion (zero-length, between pos()itions)
#              (?m)  with ^ and $ matching start and end of line
#              match the beginning of a "line"
              "^",

#              address=/16/C1/C2 
#              xRe::Token::Assertion
#              simple zero-width assertion (zero-length, between pos()itions)
#              (?m)  with ^ and $ matching start and end of line
#              match before an optional \n, and the end of a "line"
              "\$",