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FeatureRef

Struct FeatureRef 

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pub struct FeatureRef<'a> {
    pub id: Option<u64>,
    pub geometry: Geom32,
    /* private fields */
}
Expand description

A single map feature returned by Layer01FeatureIter.

The internal columnar layout is private; use iter_properties and get_property to access property values.

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§id: Option<u64>

Optional feature ID.

§geometry: Geom32

Geometry in Geom32 form (owned, computed on demand by the iterator).

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impl<'a> FeatureRef<'a>

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pub fn iter_all_properties(&self) -> FeatValuesIter<'a>

Iterate over every property slot for this feature, values only, in column order.

Yields Option<PropValueRef>:

  • Some(value) — the slot contains a non-null value.
  • None — the slot is null / absent.

The outer Option from Iterator::next signals end-of-iteration as usual.

Use Layer01::iterate_prop_names to pair values with their column names.

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pub fn iter_properties(&self) -> FeatPropertyIter<'a>

Iterate over all non-null properties for this feature.

SharedDict columns are transparently expanded into one ColumnRef per sub-item. Null / absent values are skipped entirely. The iterator is infallible.

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pub fn get_property(&self, name: &str) -> Option<PropValueRef<'a>>

Look up a property by name, returning its value if present and non-null.

For SharedDict columns the expected name is "{prefix}{suffix}", matching the key used by iter_properties.

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impl<'a> Debug for FeatureRef<'a>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a> Freeze for FeatureRef<'a>

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impl<'a> RefUnwindSafe for FeatureRef<'a>

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impl<'a> Send for FeatureRef<'a>

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impl<'a> Sync for FeatureRef<'a>

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impl<'a> Unpin for FeatureRef<'a>

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impl<'a> UnsafeUnpin for FeatureRef<'a>

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impl<'a> UnwindSafe for FeatureRef<'a>

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> 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> 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, 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<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<G1, G2> Within<G2> for G1
where G2: Contains<G1>,

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fn is_within(&self, b: &G2) -> bool