AttributeOrder

rustc_attr_parsing::attributes

Enum AttributeOrder 

Source 
pub(crate) enum AttributeOrder {
    KeepInnermost,
    KeepOutermost,
}

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KeepInnermost

Duplicates after the innermost instance of the attribute will be an error/warning. Only keep the lowest attribute.

Attributes are processed from bottom to top, so this raises a warning/error on all the attributes further above the lowest one:

#[stable(since="1.0")] //~ WARNING duplicated attribute
#[stable(since="2.0")]
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KeepOutermost

Duplicates before the outermost instance of the attribute will be an error/warning. Only keep the highest attribute.

Attributes are processed from bottom to top, so this raises a warning/error on all the attributes below the highest one:

#[path="foo.rs"]
#[path="bar.rs"] //~ WARNING duplicated attribute

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impl<T> Aligned for T

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const ALIGN: Alignment

Alignment of Self.
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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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where T: ?Sized,

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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 from(t: T) -> T

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

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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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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>
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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

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unsafe fn deref<'a>(ptr: usize) -> &'a T

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type Output = T

Should always be Self
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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>

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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:

  • KeepInnermost: 0 bytes
  • KeepOutermost: 0 bytes