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81 lines
2.3 KiB
81 lines
2.3 KiB
# SPDX-License-Identifer: Apache-2.0 |
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# Copyright 2020 The Meson development team |
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# Copyright © 2020-2021 Intel Corporation |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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"""Meson specific typing helpers. |
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Holds typing helper classes, such as the ImmutableProtocol classes |
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""" |
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__all__ = [ |
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'Protocol', |
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'ImmutableListProtocol' |
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] |
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import typing |
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# We can change this to typing when we require python 3.8 |
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from typing_extensions import Protocol |
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T = typing.TypeVar('T') |
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class StringProtocol(Protocol): |
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def __str__(self) -> str: ... |
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class SizedStringProtocol(Protocol, StringProtocol, typing.Sized): |
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pass |
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class ImmutableListProtocol(Protocol[T]): |
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"""A protocol used in cases where a list is returned, but should not be |
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mutated. |
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This provides all of the methods of a Sequence, as well as copy(). copy() |
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returns a list, which allows mutation as it's a copy and that's (hopefully) |
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safe. |
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One particular case this is important is for cached values, since python is |
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a pass-by-reference language. |
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""" |
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def __iter__(self) -> typing.Iterator[T]: ... |
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@typing.overload |
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def __getitem__(self, index: int) -> T: ... |
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@typing.overload |
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def __getitem__(self, index: slice) -> typing.List[T]: ... |
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def __contains__(self, item: T) -> bool: ... |
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def __reversed__(self) -> typing.Iterator[T]: ... |
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def __len__(self) -> int: ... |
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def __add__(self, other: typing.List[T]) -> typing.List[T]: ... |
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def __eq__(self, other: typing.Any) -> bool: ... |
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def __ne__(self, other: typing.Any) -> bool: ... |
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def __le__(self, other: typing.Any) -> bool: ... |
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def __lt__(self, other: typing.Any) -> bool: ... |
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def __gt__(self, other: typing.Any) -> bool: ... |
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def __ge__(self, other: typing.Any) -> bool: ... |
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def count(self, item: T) -> int: ... |
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def index(self, item: T) -> int: ... |
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def copy(self) -> typing.List[T]: ...
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