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| author | Daniel Mensinger <daniel@mensinger-ka.de> | 2021-06-17 00:07:04 +0200 |
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| committer | Daniel Mensinger <daniel@mensinger-ka.de> | 2021-06-18 23:48:33 +0200 |
| commit | c2c7f7c9d7b05dddb1cee028b1b685c7f2bd424c (patch) | |
| tree | 7392e6220ddede2781662bcf0851080b4f0aa1ff /mesonbuild/interpreterbase/_unholder.py | |
| parent | 6879e84c48632bcd0f6c277e81b4032a00bb1d5c (diff) | |
| download | meson-c2c7f7c9d7b05dddb1cee028b1b685c7f2bd424c.zip meson-c2c7f7c9d7b05dddb1cee028b1b685c7f2bd424c.tar.gz meson-c2c7f7c9d7b05dddb1cee028b1b685c7f2bd424c.tar.bz2 | |
holders: Ensure that InterpreterBase is the sole instance for (un)holderifying
Diffstat (limited to 'mesonbuild/interpreterbase/_unholder.py')
| -rw-r--r-- | mesonbuild/interpreterbase/_unholder.py | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/mesonbuild/interpreterbase/_unholder.py b/mesonbuild/interpreterbase/_unholder.py new file mode 100644 index 0000000..b5663a5 --- /dev/null +++ b/mesonbuild/interpreterbase/_unholder.py @@ -0,0 +1,37 @@ +# Copyright 2013-2021 The Meson development team + +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at + +# http://www.apache.org/licenses/LICENSE-2.0 + +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +from .baseobjects import InterpreterObject, MesonInterpreterObject, ObjectHolder, TYPE_var +from .exceptions import InvalidArguments +from ..mesonlib import HoldableObject, MesonBugException + +import typing as T + +def _unholder(obj: T.Union[TYPE_var, InterpreterObject]) -> TYPE_var: + if isinstance(obj, (int, bool, str)): + return obj + elif isinstance(obj, list): + return [_unholder(x) for x in obj] + elif isinstance(obj, dict): + return {k: _unholder(v) for k, v in obj.items()} + elif isinstance(obj, ObjectHolder): + assert isinstance(obj.held_object, HoldableObject) + return obj.held_object + elif isinstance(obj, MesonInterpreterObject): + return obj + elif isinstance(obj, HoldableObject): + raise MesonBugException(f'Argument {obj} of type {type(obj).__name__} is not held by an ObjectHolder.') + elif isinstance(obj, InterpreterObject): + raise InvalidArguments(f'Argument {obj} of type {type(obj).__name__} cannot be passed to a method or function') + raise MesonBugException(f'Unknown object {obj} of type {type(obj).__name__} in the parameters.') |