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54 lines
1.8 KiB
54 lines
1.8 KiB
3 years ago
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# Copyright 2021 The Meson development team
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# SPDX-license-identifier: Apache-2.0
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from ...interpreterbase import (
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ObjectHolder,
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MesonOperator,
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typed_pos_args,
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noKwargs,
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noPosargs,
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TYPE_var,
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TYPE_kwargs,
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InvalidArguments
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)
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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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class BooleanHolder(ObjectHolder[bool]):
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def __init__(self, obj: bool, interpreter: 'Interpreter') -> None:
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super().__init__(obj, interpreter)
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self.methods.update({
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'to_int': self.to_int_method,
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'to_string': self.to_string_method,
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})
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self.trivial_operators.update({
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MesonOperator.BOOL: (None, lambda x: self.held_object),
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MesonOperator.NOT: (None, lambda x: not self.held_object),
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MesonOperator.EQUALS: (bool, lambda x: self.held_object == x),
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MesonOperator.NOT_EQUALS: (bool, lambda x: self.held_object != x),
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})
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def display_name(self) -> str:
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return 'bool'
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@noKwargs
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@noPosargs
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def to_int_method(self, args: T.List[TYPE_var], kwargs: TYPE_kwargs) -> int:
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return 1 if self.held_object else 0
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@noKwargs
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@typed_pos_args('bool.to_string', optargs=[str, str])
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def to_string_method(self, args: T.Tuple[T.Optional[str], T.Optional[str]], kwargs: TYPE_kwargs) -> str:
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true_str = args[0] or 'true'
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false_str = args[1] or 'false'
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if any(x is not None for x in args) and not all(x is not None for x in args):
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raise InvalidArguments('bool.to_string() must have either no arguments or exactly two string arguments that signify what values to return for true and false.')
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return true_str if self.held_object else false_str
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