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rust-node: binary Node ID and conversion utilities...
rust-node: binary Node ID and conversion utilities The choice of type makes sure that a `Node` has the exact wanted size. We'll use a different type for prefixes. Added dependency: hexadecimal conversion relies on the `hex` crate. The fact that sooner or later Mercurial is going to need to change its hash sizes has been taken strongly in consideration: - the hash length is a constant, but that is not directly exposed to callers. Changing the value of that constant is the only thing to do to change the hash length (even in unit tests) - the code could be adapted to support several sizes of hashes, if that turned out to be useful. To that effect, only the size of a given `Node` is exposed in the public API. - callers not involved in initial computation, I/O and FFI are able to operate without a priori assumptions on the hash size. The traits `FromHex` and `ToHex` have not been directly implemented, so that the doc-comments explaining these restrictions would stay really visible in `cargo doc` Differential Revision: https://phab.mercurial-scm.org/D7788

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interfaces.py
105 lines | 4.2 KiB | text/x-python | PythonLexer
##############################################################################
#
# Copyright (c) 2003 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Interfaces for standard python exceptions
"""
from __future__ import absolute_import
from .. import Interface
from .. import classImplements
class IException(Interface): pass
class IStandardError(IException): pass
class IWarning(IException): pass
class ISyntaxError(IStandardError): pass
class ILookupError(IStandardError): pass
class IValueError(IStandardError): pass
class IRuntimeError(IStandardError): pass
class IArithmeticError(IStandardError): pass
class IAssertionError(IStandardError): pass
class IAttributeError(IStandardError): pass
class IDeprecationWarning(IWarning): pass
class IEOFError(IStandardError): pass
class IEnvironmentError(IStandardError): pass
class IFloatingPointError(IArithmeticError): pass
class IIOError(IEnvironmentError): pass
class IImportError(IStandardError): pass
class IIndentationError(ISyntaxError): pass
class IIndexError(ILookupError): pass
class IKeyError(ILookupError): pass
class IKeyboardInterrupt(IStandardError): pass
class IMemoryError(IStandardError): pass
class INameError(IStandardError): pass
class INotImplementedError(IRuntimeError): pass
class IOSError(IEnvironmentError): pass
class IOverflowError(IArithmeticError): pass
class IOverflowWarning(IWarning): pass
class IReferenceError(IStandardError): pass
class IRuntimeWarning(IWarning): pass
class IStopIteration(IException): pass
class ISyntaxWarning(IWarning): pass
class ISystemError(IStandardError): pass
class ISystemExit(IException): pass
class ITabError(IIndentationError): pass
class ITypeError(IStandardError): pass
class IUnboundLocalError(INameError): pass
class IUnicodeError(IValueError): pass
class IUserWarning(IWarning): pass
class IZeroDivisionError(IArithmeticError): pass
classImplements(ArithmeticError, IArithmeticError)
classImplements(AssertionError, IAssertionError)
classImplements(AttributeError, IAttributeError)
classImplements(DeprecationWarning, IDeprecationWarning)
classImplements(EnvironmentError, IEnvironmentError)
classImplements(EOFError, IEOFError)
classImplements(Exception, IException)
classImplements(FloatingPointError, IFloatingPointError)
classImplements(ImportError, IImportError)
classImplements(IndentationError, IIndentationError)
classImplements(IndexError, IIndexError)
classImplements(IOError, IIOError)
classImplements(KeyboardInterrupt, IKeyboardInterrupt)
classImplements(KeyError, IKeyError)
classImplements(LookupError, ILookupError)
classImplements(MemoryError, IMemoryError)
classImplements(NameError, INameError)
classImplements(NotImplementedError, INotImplementedError)
classImplements(OSError, IOSError)
classImplements(OverflowError, IOverflowError)
try:
classImplements(OverflowWarning, IOverflowWarning)
except NameError: #pragma NO COVER
pass # OverflowWarning was removed in Python 2.5
classImplements(ReferenceError, IReferenceError)
classImplements(RuntimeError, IRuntimeError)
classImplements(RuntimeWarning, IRuntimeWarning)
try:
classImplements(StandardError, IStandardError)
except NameError: #pragma NO COVER
pass # StandardError does not exist in Python 3
classImplements(StopIteration, IStopIteration)
classImplements(SyntaxError, ISyntaxError)
classImplements(SyntaxWarning, ISyntaxWarning)
classImplements(SystemError, ISystemError)
classImplements(SystemExit, ISystemExit)
classImplements(TabError, ITabError)
classImplements(TypeError, ITypeError)
classImplements(UnboundLocalError, IUnboundLocalError)
classImplements(UnicodeError, IUnicodeError)
classImplements(UserWarning, IUserWarning)
classImplements(ValueError, IValueError)
classImplements(Warning, IWarning)
classImplements(ZeroDivisionError, IZeroDivisionError)