new_contents: import gdb
  import re
   
  class ShortVectorPrinter:
      def __init__(self, val):
          self.val = val
  
      def to_string(self):
          size = int(self.val['_size'])
          N = int(self.val.type.template_argument(1))
          cap = N if size <= N else int(self.val['_capacity'])
          return 'MArray::short_vector<%d> of length %d, capacity %d' % (N, size, cap)
  
      def children(self):
          size = int(self.val['_size'])
          data = self.val['_alloc']['_data']
          for i in range(size):
              yield ('[%d]' % i, data.dereference())
              data = data + 1
  
      def display_hint(self):
          return 'array'
      
  def str_lookup_function(val):
      lookup_tag = val.type.strip_typedefs().tag
      if lookup_tag == None:
          return None
      regex = re.compile("^MArray::short_vector<.*>$")
      if regex.match(lookup_tag):
          return ShortVectorPrinter(val)
      return None
  
  gdb.pretty_printers.append(str_lookup_function)
  
subject: Add GDB pretty-printer for short_vector<T,N>