/usr/lib/python2.7/dist-packages/apptools/type_manager/abstract_type_system.py is in python-apptools 4.3.0-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | """ The abstract base class for type systems. """
# Enthought library imports.
from traits.api import HasTraits
class AbstractTypeSystem(HasTraits):
""" The abstract base class for type systems.
A type system is responsible for:-
1) Determining whether an object is of a particular type.
2) Determining the MRO of a type.
See 'PythonTypeSystem' for an implementation with standard Python
semantics.
"""
###########################################################################
# 'AbstractTypeSystem' interface.
###########################################################################
def is_a(self, obj, type):
""" Is an object an instance of the specified type? """
raise NotImplementedError
def get_mro(self, type):
""" Returns the MRO of a type. """
raise NotImplementedError
#### EOF ######################################################################
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