Change

beck_core::pmap

Struct Change 

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pub struct Change<K, V> {
    pub key: K,
    pub old: Option<V>,
    pub new: Option<V>,
}
Expand description

What happened to one key between two versions of a map.

old and new are both present for an update, one of them for an insert or a remove. Both absent never occurs.

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§key: K§old: Option<V>§new: Option<V>

Trait Implementations§

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impl<K: Clone, V: Clone> Clone for Change<K, V>

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fn clone(&self) -> Change<K, V>

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<K: Debug, V: Debug> Debug for Change<K, V>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<K: PartialEq, V: PartialEq> PartialEq for Change<K, V>

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fn eq(&self, other: &Change<K, V>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<K: Eq, V: Eq> Eq for Change<K, V>

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impl<K, V> StructuralPartialEq for Change<K, V>

Auto Trait Implementations§

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impl<K, V> Freeze for Change<K, V>
where K: Freeze, V: Freeze,

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impl<K, V> RefUnwindSafe for Change<K, V>
where K: RefUnwindSafe, V: RefUnwindSafe,

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impl<K, V> Send for Change<K, V>
where K: Send, V: Send,

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impl<K, V> Sync for Change<K, V>
where K: Sync, V: Sync,

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impl<K, V> Unpin for Change<K, V>
where K: Unpin, V: Unpin,

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impl<K, V> UnwindSafe for Change<K, V>
where K: UnwindSafe, V: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.