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Optional is a Generator that will optionally choose to generate exactly 1
of its generator or and empty value
Formats the value using the given formatter.
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Generate a value from the specific implementation of the Generator
Generate a value of the negation of the specified Generator
Immutably borrows from an owned value.
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Mutably borrows from an owned value.
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Returns the argument unchanged.
Calls U::from(self)
.
That is, this conversion is whatever the implementation of
From<T> for U
chooses to do.
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.