old_contents: from basetypes import *
  from exttypes import *
  from closuretypes import *
  from ssatypes import *
  from templatetypes import *
  from typemapper import *
  
  __all__ = minitypes.__all__ + [
      'O', 'b1', 'i1', 'i2', 'i4', 'i8', 'u1', 'u2', 'u4', 'u8',
      'f4', 'f8', 'f16', 'c8', 'c16', 'c32', 'template',
  ]
  
  #------------------------------------------------------------------------
  # Utilities
  #------------------------------------------------------------------------
  
  def is_obj(type):
      return type.is_object or type.is_array
  
  native_type_dict = {}
  for native_type in minitypes.native_integral:
      native_type_dict[(native_type.itemsize, native_type.signed)] = native_type
  
  def promote_to_native(int_type):
      return native_type_dict[int_type.itemsize, int_type.signed]
  
  def promote_closest(context, int_type, candidates):
      """
      promote_closest(Py_ssize_t, [int_, long_, longlong]) -> longlong
      """
      for candidate in candidates:
          promoted = context.promote_types(int_type, candidate)
          if promoted.itemsize == candidate.itemsize and promoted.signed == candidate.signed:
              return candidate
  
      return candidates[-1]
  
  #------------------------------------------------------------------------
  # Type shorthands
  #------------------------------------------------------------------------
  
  O = object_
  b1 = bool_
  i1 = int8
  i2 = int16
  i4 = int32
  i8 = int64
  u1 = uint8
  u2 = uint16
  u4 = uint32
  u8 = uint64
  
  f4 = float32
  f8 = float64
  f16 = float128
  
  c8 = complex64
  c16 = complex128
  c32 = complex256
  
new_contents: from basetypes import *
  from exttypes import *
  from closuretypes import *
  from ssatypes import *
  from templatetypes import *
  from typemapper import *
  
  from shorthands import *
  
  __all__ = minitypes.__all__ + [
      'O', 'b1', 'i1', 'i2', 'i4', 'i8', 'u1', 'u2', 'u4', 'u8',
      'f4', 'f8', 'f16', 'c8', 'c16', 'c32', 'template',
  ]
  
subject: Move some code from typesystem.__init__