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# Copyright (C) 2009, 2010 Canonical Ltd
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# Copyright (C) 2009 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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"""Interface thunk for a StaticTuple implementation."""
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from __future__ import absolute_import
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from ._static_tuple_c import StaticTuple
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except ImportError as e:
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from bzrlib._static_tuple_c import StaticTuple
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except ImportError, e:
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from bzrlib import osutils
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osutils.failed_to_load_extension(e)
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from ._static_tuple_py import StaticTuple
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def expect_static_tuple(obj):
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"""Check if the passed object is a StaticTuple.
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Cast it if necessary, but if the 'static_tuple' debug flag is set, raise an
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As apis are improved, we will probably eventually stop calling this as it
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adds overhead we shouldn't need.
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if 'static_tuple' not in debug.debug_flags:
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return StaticTuple.from_sequence(obj)
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if not isinstance(obj, StaticTuple):
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raise TypeError('We expected a StaticTuple not a %s' % (type(obj),))
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"""Ensure that the object and any referenced objects are plain tuples.
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:param obj: a list, tuple or StaticTuple
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:return: a plain tuple instance, with all children also being tuples.
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if isinstance(item, (tuple, list, StaticTuple)):
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item = as_tuples(item)
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from bzrlib._static_tuple_py import StaticTuple