pub enum Mappings<K = (), V = ()> {
    Simple(Option<Map<K, V>>),
    List(Vec<Map<K, V>>),
}
Expand description

A collection of Maps.

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Simple(Option<Map<K, V>>)

Zero or one mappings.

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List(Vec<Map<K, V>>)

More than one mapping.

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impl<K, V> Mappings<K, V>

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pub const fn none() -> Mappings<K, V>

Returns an empty collection of mappings.

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pub fn push(&mut self, mapping: Map<K, V>)

Appends mapping to the end of this collection.

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pub fn and(self, mappings: Mappings<K, V>) -> Mappings<K, V>

Appends mappings to the end of this collection and returns self.

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pub fn iter(&self) -> MappingsIter<'_, K, V>

Returns an iterator for these mappings.

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pub fn len(&self) -> usize

Returns the number of mappings contained.

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pub fn is_empty(&self) -> bool

Returns true if there are no mappings in this collection.

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impl<K, V> Debug for Mappings<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
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impl<K, V> Default for Mappings<K, V>

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fn default() -> Mappings<K, V>

Returns the “default value” for a type. Read more
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impl<K, V> Extend<Map<K, V>> for Mappings<K, V>

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fn extend<T>(&mut self, iter: T)where T: IntoIterator<Item = Map<K, V>>,

Extends a collection with the contents of an iterator. Read more
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fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)
Extends a collection with exactly one element.
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fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)
Reserves capacity in a collection for the given number of additional elements. Read more
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impl<K, V> FromIterator<Map<K, V>> for Mappings<K, V>

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fn from_iter<T>(iter: T) -> Mappings<K, V>where T: IntoIterator<Item = Map<K, V>>,

Creates a value from an iterator. Read more
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impl<K, V> FromIterator<Mappings<K, V>> for Mappings<K, V>

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fn from_iter<T>(iter: T) -> Mappings<K, V>where T: IntoIterator<Item = Mappings<K, V>>,

Creates a value from an iterator. Read more
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impl<'a, K, V> IntoIterator for &'a Mappings<K, V>

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type IntoIter = MappingsIter<'a, K, V>

Which kind of iterator are we turning this into?
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type Item = &'a Map<K, V>

The type of the elements being iterated over.
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fn into_iter(self) -> <&'a Mappings<K, V> as IntoIterator>::IntoIter

Creates an iterator from a value. Read more
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impl<K, V> IntoIterator for Mappings<K, V>

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type IntoIter = MappingsIntoIter<K, V>

Which kind of iterator are we turning this into?
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type Item = Map<K, V>

The type of the elements being iterated over.
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fn into_iter(self) -> <Mappings<K, V> as IntoIterator>::IntoIter

Creates an iterator from a value. Read more
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impl<K, V> PartialEq for Mappings<K, V>where K: PartialEq, V: PartialEq,

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

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

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

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impl<K, V> StructuralEq for Mappings<K, V>

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

Auto Trait Implementations§

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

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

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

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

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

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere T: 'a,

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fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

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impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere T: 'a,

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fn implicit( self, class: Class, constructed: bool, tag: u32 ) -> TaggedParser<'a, Implicit, Self, E>

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impl<T> Borrow<T> for Twhere 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 Twhere 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<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for Twhere 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> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for Twhere 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 Twhere 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<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more