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Diffstat (limited to 'lib/spack/external/py2/typing_extensions.py')
| -rw-r--r-- | lib/spack/external/py2/typing_extensions.py | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/spack/external/py2/typing_extensions.py b/lib/spack/external/py2/typing_extensions.py new file mode 100644 index 0000000000..ca6bc10999 --- /dev/null +++ b/lib/spack/external/py2/typing_extensions.py @@ -0,0 +1,26 @@ +# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other +# Spack Project Developers. See the top-level COPYRIGHT file for details. +# +# SPDX-License-Identifier: (Apache-2.0 OR MIT) +""" +This is a fake set of symbols to allow spack to import typing in python +versions where we do not support type checking (<3) +""" +from collections import defaultdict + +# (1) Unparameterized types. +IntVar = object +Literal = object +NewType = object +Text = object + +# (2) Parameterized types. +Protocol = defaultdict(lambda: object) + +# (3) Macro for avoiding evaluation except during type checking. +TYPE_CHECKING = False + +# (4) Decorators. +final = lambda x: x +overload = lambda x: x +runtime_checkable = lambda x: x |