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80 lines
2.9 KiB
80 lines
2.9 KiB
4 years ago
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# 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
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import typing as T
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TV_fw_var = T.Union[str, int, float, bool, list, dict, 'InterpreterObject', 'ObjectHolder']
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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, float, bool]
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TYPE_var = T.Union[TYPE_elementary, T.List[T.Any], T.Dict[str, T.Any], 'InterpreterObject', 'ObjectHolder']
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TYPE_nvar = T.Union[TYPE_var, mparser.BaseNode]
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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) -> None:
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self.methods = {} # type: T.Dict[str, T.Callable[[T.List[TYPE_nvar], TYPE_nkwargs], TYPE_var]]
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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 = None # type: mparser.BaseNode
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def method_call(
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self,
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method_name: str,
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args: TV_fw_args,
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kwargs: TV_fw_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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return method(args, kwargs)
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raise InvalidCode('Unknown method "%s" in object.' % method_name)
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class MutableInterpreterObject(InterpreterObject):
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def __init__(self) -> None:
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super().__init__()
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TV_InterpreterObject = T.TypeVar('TV_InterpreterObject')
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class ObjectHolder(T.Generic[TV_InterpreterObject]):
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def __init__(self, obj: TV_InterpreterObject, subproject: str = '') -> None:
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self.held_object = obj
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self.subproject = subproject
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def __repr__(self) -> str:
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return f'<Holder: {self.held_object!r}>'
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class RangeHolder(InterpreterObject):
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def __init__(self, start: int, stop: int, step: int) -> None:
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super().__init__()
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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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