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96 lines
3.9 KiB
96 lines
3.9 KiB
# Copyright 2013-2021 The Meson development team |
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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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from .. import mparser |
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from .exceptions import InvalidCode |
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from .helpers import flatten, resolve_second_level_holders |
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from ..mesonlib import HoldableObject |
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import typing as T |
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if T.TYPE_CHECKING: |
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# Object holders need the actual interpreter |
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from ..interpreter import Interpreter |
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TV_fw_var = T.Union[str, int, bool, list, dict, 'InterpreterObject'] |
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TV_fw_args = T.List[T.Union[mparser.BaseNode, TV_fw_var]] |
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TV_fw_kwargs = T.Dict[str, T.Union[mparser.BaseNode, TV_fw_var]] |
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TV_func = T.TypeVar('TV_func', bound=T.Callable[..., T.Any]) |
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TYPE_elementary = T.Union[str, int, bool, T.List[T.Any], T.Dict[str, T.Any]] |
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TYPE_var = T.Union[TYPE_elementary, HoldableObject, 'MesonInterpreterObject'] |
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TYPE_nvar = T.Union[TYPE_var, mparser.BaseNode] |
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TYPE_kwargs = T.Dict[str, TYPE_var] |
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TYPE_nkwargs = T.Dict[str, TYPE_nvar] |
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TYPE_key_resolver = T.Callable[[mparser.BaseNode], str] |
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class InterpreterObject: |
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def __init__(self, *, subproject: T.Optional[str] = None) -> None: |
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self.methods: T.Dict[ |
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str, |
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T.Callable[[T.List[TYPE_var], TYPE_kwargs], TYPE_var] |
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] = {} |
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# Current node set during a method call. This can be used as location |
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# when printing a warning message during a method call. |
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self.current_node: mparser.BaseNode = None |
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self.subproject: str = subproject or '' |
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def method_call( |
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self, |
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method_name: str, |
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args: T.List[TYPE_var], |
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kwargs: TYPE_kwargs |
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) -> TYPE_var: |
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if method_name in self.methods: |
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method = self.methods[method_name] |
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if not getattr(method, 'no-args-flattening', False): |
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args = flatten(args) |
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if not getattr(method, 'no-second-level-holder-flattening', False): |
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args, kwargs = resolve_second_level_holders(args, kwargs) |
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return method(args, kwargs) |
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raise InvalidCode(f'Unknown method "{method_name}" in object {self} of type {type(self).__name__}.') |
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class MesonInterpreterObject(InterpreterObject): |
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''' All non-elementary objects and non-object-holders should be derived from this ''' |
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class MutableInterpreterObject: |
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''' Dummy class to mark the object type as mutable ''' |
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InterpreterObjectTypeVar = T.TypeVar('InterpreterObjectTypeVar', bound=HoldableObject) |
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class ObjectHolder(InterpreterObject, T.Generic[InterpreterObjectTypeVar]): |
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def __init__(self, obj: InterpreterObjectTypeVar, interpreter: 'Interpreter') -> None: |
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super().__init__(subproject=interpreter.subproject) |
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assert isinstance(obj, HoldableObject), f'This is a bug: Trying to hold object of type `{type(obj).__name__}` that is not an `HoldableObject`' |
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self.held_object = obj |
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self.interpreter = interpreter |
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self.env = self.interpreter.environment |
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def __repr__(self) -> str: |
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return f'<[{type(self).__name__}] holds [{type(self.held_object).__name__}]: {self.held_object!r}>' |
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class RangeHolder(MesonInterpreterObject): |
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def __init__(self, start: int, stop: int, step: int, *, subproject: T.Optional[str] = None) -> None: |
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super().__init__(subproject=subproject) |
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self.range = range(start, stop, step) |
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def __iter__(self) -> T.Iterator[int]: |
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return iter(self.range) |
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def __getitem__(self, key: int) -> int: |
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return self.range[key] |
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def __len__(self) -> int: |
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return len(self.range)
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