# -*- coding: utf-8 -*-

# Copyright (C) 2005 Osmo Salomaa
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

"""All :mod:`aeidon` error classes."""

__all__ = (
    "Error",
    "AffirmationError",
    "FormatError",
    "ParseError",
    "ProcessError",
)


class Error(Exception):

    """Base class for all :mod:`aeidon` errors."""

    pass


class AffirmationError(Error):

    """
    Something expected to be ``True`` was ``False``.

    :exc:`AffirmationError` is like :exc:`AssertionError`, but without
    the special reliance on :const:`__debug__` and given optimization options.
    :exc:`AffirmationError` can be used to provide essential checks of boolean
    values instead of optional debug checks.
    """

    pass


class FormatError(Error):

    """Unrecognized subtitle file format."""

    pass


class ParseError(Error):

    """
    Failed to parse a subtitle file into positions and texts.

    :exc:`ParseError` is caused by either a syntax error in the file being
    parsed or a programming error in the code doing the parsing.
    """

    pass


class ProcessError(Error):

    """Error in an external process."""

    pass