pub enum FoldWhile<T> {
    Continue(T),
    Done(T),
}
Expand description
An enum used for controlling the execution of .fold_while().
See .fold_while() for more information.
Continue folding with this value
Fold is complete and will return this value
Return the value in the continue or done.
Return true if self is Done, false if it is Continue.
Performs copy-assignment from 
source. 
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Formats the value using the given formatter. 
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This method tests for self and other values to be equal, and is used
by ==.
This method tests for !=. The default implementation is almost always
sufficient, and should not be overridden without very good reason.
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 resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. 
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Uses borrowed data to replace owned data, usually by cloning. 
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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.