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# ----------------------------------------------------------------------------
# Copyright (c) 2013--, scikit-bio development team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE.txt, distributed with this software.
# ----------------------------------------------------------------------------
class TreeError(Exception):
"""General tree error."""
pass
class NoLengthError(TreeError):
"""Missing length when expected."""
pass
class DuplicateNodeError(TreeError):
"""Duplicate nodes with identical names."""
pass
class MissingNodeError(TreeError):
"""Expecting a node."""
pass
class NoParentError(MissingNodeError):
"""Missing a parent."""
pass
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