gistfile1.py

RE_PERLQQ_META = re.compile(r'''(?x)
    \\(?: (?P<special>[nrt\\@$])
        | (?P<octal>[0-3][0-7][0-7]|[0-7][0-7]|[0-7])
        | x(?: (?P<hex>[0-9a-fA-F]{2})
             | \{(?P<bracketed_hex>[0-9a-fA-F]{2,4})\}
           )
        | N\{(?: U\+(?P<unicode>[0-9a-fA-F]{4})
               | (?P<unicode_name>[-A-Z0-9 ]*)
             )\}
      )
    | \$(?: (?P<group>&|0|[1-9][0-9]*)
          | (?P<span>[-+]\[(?P<span_group>0|[1-9][0-9]*)\])
          | (?P<last_group1>\+)(?:\{(?P<named_group>[a-zA-Z_][a-zA-Z0-9_]*)\})?
          | \{(?P<val>[a-zA-Z]+)\}
          | (?P<last_group2>\^N)
        )
    | @(?P<groups>[-+])
    ''')