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Cursor

narui::re_export::smallvec::alloc::collections::btree_map

Struct Cursor 

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pub struct Cursor<'a, K, V>
where
    K: 'a,
    V: 'a,
{ /* private fields */ }
🔬This is a nightly-only experimental API. (btree_cursors)
Expand description

A cursor over a BTreeMap.

A Cursor is like an iterator, except that it can freely seek back-and-forth.

Cursors always point to a gap between two elements in the map, and can operate on the two immediately adjacent elements.

A Cursor is created with the BTreeMap::lower_bound and BTreeMap::upper_bound methods.

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impl<'a, K, V> Cursor<'a, K, V>

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pub fn next(&mut self) -> Option<(&'a K, &'a V)>

🔬This is a nightly-only experimental API. (btree_cursors)

Advances the cursor to the next gap, returning the key and value of the element that it moved over.

If the cursor is already at the end of the map then None is returned and the cursor is not moved.

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pub fn prev(&mut self) -> Option<(&'a K, &'a V)>

🔬This is a nightly-only experimental API. (btree_cursors)

Advances the cursor to the previous gap, returning the key and value of the element that it moved over.

If the cursor is already at the start of the map then None is returned and the cursor is not moved.

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pub fn peek_next(&self) -> Option<(&'a K, &'a V)>

🔬This is a nightly-only experimental API. (btree_cursors)

Returns a reference to the key and value of the next element without moving the cursor.

If the cursor is at the end of the map then None is returned.

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pub fn peek_prev(&self) -> Option<(&'a K, &'a V)>

🔬This is a nightly-only experimental API. (btree_cursors)

Returns a reference to the key and value of the previous element without moving the cursor.

If the cursor is at the start of the map then None is returned.

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impl<K, V> Clone for Cursor<'_, K, V>

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fn clone(&self) -> Cursor<'_, K, V>

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<K, V> Debug for Cursor<'_, K, V>
where K: Debug, V: Debug,

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a, K, V> Freeze for Cursor<'a, K, V>

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impl<'a, K, V> RefUnwindSafe for Cursor<'a, K, V>
where K: RefUnwindSafe, V: RefUnwindSafe,

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impl<'a, K, V> Send for Cursor<'a, K, V>
where K: Sync, V: Sync,

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impl<'a, K, V> Sync for Cursor<'a, K, V>
where K: Sync, V: Sync,

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impl<'a, K, V> Unpin for Cursor<'a, K, V>

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impl<'a, K, V> UnsafeUnpin for Cursor<'a, K, V>

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impl<'a, K, V> UnwindSafe for Cursor<'a, K, V>
where K: RefUnwindSafe, V: RefUnwindSafe,

Blanket Implementations§

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impl<S, D, Swp, Dwp, T> AdaptInto<D, Swp, Dwp, T> for S
where T: FloatComponent, Swp: WhitePoint, Dwp: WhitePoint, D: AdaptFrom<S, Swp, Dwp, T>,

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fn adapt_into_using<M>(self, method: M) -> D
where M: TransformMatrix<Swp, Dwp, T>,

Convert the source color to the destination color using the specified method
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fn adapt_into(self) -> D

Convert the source color to the destination color using the bradford method by default
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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> Content for T

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fn ref_from_ptr<'a>(ptr: *mut c_void, size: usize) -> Option<*mut T>

Builds a pointer to this type from a raw pointer.
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fn is_size_suitable(size: u64) -> bool

Returns true if the size is suitable to store a type like this.
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fn indiv_size() -> u64

Returns the size of an individual element.
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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, U> IntoColor<U> for T
where U: FromColor<T>,

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fn into_color(self) -> U

Convert into T with values clamped to the color defined bounds Read more
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impl<T, U> IntoColorUnclamped<U> for T
where U: FromColorUnclamped<T>,

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fn into_color_unclamped(self) -> U

Convert into T. The resulting color might be invalid in its color space Read more
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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> SafeBorrow<T> for T

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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.
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impl<T, U> TryIntoColor<U> for T
where U: TryFromColor<T>,

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fn try_into_color(self) -> Result<U, OutOfBounds<U>>

Convert into T, returning ok if the color is inside of its defined range, otherwise an OutOfBounds error is returned which contains the unclamped color. Read more