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# Copyright 2021 The Meson development team
# SPDX-license-identifier: Apache-2.0
from ...interpreterbase import (
ObjectHolder,
MesonOperator,
typed_pos_args,
noKwargs,
noPosargs,
TYPE_var,
TYPE_kwargs,
InvalidArguments
)
import typing as T
if T.TYPE_CHECKING:
# Object holders need the actual interpreter
from ...interpreter import Interpreter
class BooleanHolder(ObjectHolder[bool]):
def __init__(self, obj: bool, interpreter: 'Interpreter') -> None:
super().__init__(obj, interpreter)
self.methods.update({
'to_int': self.to_int_method,
'to_string': self.to_string_method,
})
self.trivial_operators.update({
MesonOperator.BOOL: (None, lambda x: self.held_object),
MesonOperator.NOT: (None, lambda x: not self.held_object),
MesonOperator.EQUALS: (bool, lambda x: self.held_object == x),
MesonOperator.NOT_EQUALS: (bool, lambda x: self.held_object != x),
})
def display_name(self) -> str:
return 'bool'
@noKwargs
@noPosargs
def to_int_method(self, args: T.List[TYPE_var], kwargs: TYPE_kwargs) -> int:
return 1 if self.held_object else 0
@noKwargs
@typed_pos_args('bool.to_string', optargs=[str, str])
def to_string_method(self, args: T.Tuple[T.Optional[str], T.Optional[str]], kwargs: TYPE_kwargs) -> str:
true_str = args[0] or 'true'
false_str = args[1] or 'false'
if any(x is not None for x in args) and not all(x is not None for x in args):
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.')
return true_str if self.held_object else false_str
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