feat: Guards now support the evaluation of **truthy**** and **falsy** and can be assigned as decorators #342
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…* values and can be assigned as decorators
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Guards now support the evaluation of truthy and falsy values, and can be assigned as decorators.
Note about truthy and falsy values
In Python, a boolean value is either
TrueorFalse. However, there are also specific values thatare considered "falsy" and will evaluate as
Falsewhen used in a boolean context.These include:
None.0or0.0.__bool__()or__len__()method that returnsFalseor0, respectively.On the other hand, any value that is not considered "falsy" is considered "truthy" and will evaluate as
Truewhen used in a boolean context.So, a condition
s1.to(s2, cond=lambda: [])will evaluate toFalse, as an empty list is afalsy value.