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dagutil: use revlog.parentrevs() for resolving parent revisions...
dagutil: use revlog.parentrevs() for resolving parent revisions And remove parents() since it is no longer used. revlog.parentrevs() is almost the same as parents(). The main difference is that parentrevs() can return nullrev. dagop.headrevs() already handles nullrev. We add an inline check for nullrev in the other call site to account for the difference. .. api:: parents() removed from dagutil classes Use parentrevs() on the storage object instead. Differential Revision: https://phab.mercurial-scm.org/D4328
Siddharth Agarwal - - Load All Authors

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exceptions.py
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/ mercurial / thirdparty / attr / exceptions.py
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from __future__ import absolute_import, division, print_function
class FrozenInstanceError(AttributeError):
"""
A frozen/immutable instance has been attempted to be modified.
It mirrors the behavior of ``namedtuples`` by using the same error message
and subclassing :exc:`AttributeError`.
.. versionadded:: 16.1.0
"""
msg = "can't set attribute"
args = [msg]
class AttrsAttributeNotFoundError(ValueError):
"""
An ``attrs`` function couldn't find an attribute that the user asked for.
.. versionadded:: 16.2.0
"""
class NotAnAttrsClassError(ValueError):
"""
A non-``attrs`` class has been passed into an ``attrs`` function.
.. versionadded:: 16.2.0
"""
class DefaultAlreadySetError(RuntimeError):
"""
A default has been set using ``attr.ib()`` and is attempted to be reset
using the decorator.
.. versionadded:: 17.1.0
"""