Enum AttributeOrder

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pub(crate) enum AttributeOrder {
    KeepFirst,
    KeepLast,
}

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KeepFirst

Duplicates after the first attribute will be an error.

This should be used where duplicates would be ignored, but carry extra meaning that could cause confusion. For example, #[stable(since="1.0")] #[stable(since="2.0")], which version should be used for stable?

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KeepLast

Duplicates preceding the last instance of the attribute will be a warning, with a note that this will be an error in the future.

This is the same as FutureWarnFollowing, except the last attribute is the one that is “used”. Ideally these can eventually migrate to ErrorPreceding.

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impl<T> Aligned for T

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const ALIGN: Alignment

Alignment of Self.
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where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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where T: ?Sized,

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impl<T, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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fn instrument(self, span: Span) -> Instrumented<Self>

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

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

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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

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type Output = T

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

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

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where U: UpcastFrom<I, T>,

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fn upcast(self, interner: I) -> U

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Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 1 byte

Size for each variant:

  • KeepFirst: 0 bytes
  • KeepLast: 0 bytes