Struct read_fonts::ArrayOfNullableOffsets

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pub struct ArrayOfNullableOffsets<'a, T: ReadArgs, O: Scalar = Offset16> { /* private fields */ }
Expand description

An array of nullable offsets that can be resolved on access.

This is identical to ArrayOfOffsets, except that each offset is allowed to be null.

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impl<'a, T, O> ArrayOfNullableOffsets<'a, T, O>
where O: Scalar + Offset, T: ReadArgs + FontReadWithArgs<'a>, T::Args: Copy + 'static,

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pub fn len(&self) -> usize

The number of offsets in the array

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pub fn is_empty(&self) -> bool

true if the array is empty

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pub fn get(&self, idx: usize) -> Option<Result<T, ReadError>>

Resolve the offset at the provided index.

This will return None only if the offset exists, but is null. if the provided index does not exist, this will return the InvalidCollectionIndex error variant.

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pub fn iter(&self) -> impl Iterator<Item = Option<Result<T, ReadError>>> + 'a

Iterate over all of the offset targets.

Each offset will be resolved as it is encountered.

Trait Implementations§

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impl<'a, T: Clone + ReadArgs, O: Clone + Scalar> Clone for ArrayOfNullableOffsets<'a, T, O>
where T::Args: Clone,

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fn clone(&self) -> ArrayOfNullableOffsets<'a, T, O>

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

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl<'a, T, O> Freeze for ArrayOfNullableOffsets<'a, T, O>
where <T as ReadArgs>::Args: Freeze,

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impl<'a, T, O> RefUnwindSafe for ArrayOfNullableOffsets<'a, T, O>

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impl<'a, T, O> Send for ArrayOfNullableOffsets<'a, T, O>
where <T as ReadArgs>::Args: Send, <O as Scalar>::Raw: Sync,

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impl<'a, T, O> Sync for ArrayOfNullableOffsets<'a, T, O>
where <T as ReadArgs>::Args: Sync, <O as Scalar>::Raw: Sync,

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impl<'a, T, O> Unpin for ArrayOfNullableOffsets<'a, T, O>
where <T as ReadArgs>::Args: Unpin,

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impl<'a, T, O> UnwindSafe for ArrayOfNullableOffsets<'a, T, O>
where <T as ReadArgs>::Args: UnwindSafe, <O as Scalar>::Raw: RefUnwindSafe,

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> 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.