view mercurial/thirdparty/attr/exceptions.py @ 34638:021607b4ef49

dispatch: when --pager=no is passed, also disable pager on req.repo.ui

With a future chg change, `req.repo` could be set and currently it is
unaffected by `--pager=on`. This patch makes it so.

This could make one of the test cases in `test-pager.t` pass with future chg
changes.

Differential Revision: https://phab.mercurial-scm.org/D990

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
    """