Struct rustc_target::abi::Layout

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pub struct Layout<'a>(pub Interned<'a, LayoutS<FieldIdx, VariantIdx>>);

Tuple Fields§

§0: Interned<'a, LayoutS<FieldIdx, VariantIdx>>

Implementations§

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impl<'a> Layout<'a>

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pub fn fields(self) -> &'a FieldsShape<FieldIdx>

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pub fn variants(self) -> &'a Variants<FieldIdx, VariantIdx>

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pub fn abi(self) -> Abi

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pub fn largest_niche(self) -> Option<Niche>

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pub fn align(self) -> AbiAndPrefAlign

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pub fn size(self) -> Size

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pub fn max_repr_align(self) -> Option<Align>

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pub fn unadjusted_abi_align(self) -> Align

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pub fn is_pointer_like(self, data_layout: &TargetDataLayout) -> bool

Whether the layout is from a type that implements std::marker::PointerLike.

Currently, that means that the type is pointer-sized, pointer-aligned, and has a initialized (non-union), scalar ABI.

Methods from Deref<Target = &'a LayoutS<FieldIdx, VariantIdx>>§

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pub fn is_unsized(&self) -> bool

Returns true if the layout corresponds to an unsized type.

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pub fn is_sized(&self) -> bool

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pub fn is_1zst(&self) -> bool

Returns true if the type is sized and a 1-ZST (meaning it has size 0 and alignment 1).

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pub fn is_zst(&self) -> bool

Returns true if the type is a ZST and not unsized.

Note that this does not imply that the type is irrelevant for layout! It can still have non-trivial alignment constraints. You probably want to use is_1zst instead.

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pub fn eq_abi(&self, other: &LayoutS<FieldIdx, VariantIdx>) -> bool

Checks if these two Layout are equal enough to be considered “the same for all function call ABIs”. Note however that real ABIs depend on more details that are not reflected in the Layout; the PassMode need to be compared as well.

Trait Implementations§

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impl<'a> Clone for Layout<'a>

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fn clone(&self) -> Layout<'a>

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
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impl<'a> Debug for Layout<'a>

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

Formats the value using the given formatter. Read more
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impl<'a> Deref for Layout<'a>

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type Target = &'a LayoutS<FieldIdx, VariantIdx>

The resulting type after dereferencing.
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fn deref(&self) -> &&'a LayoutS<FieldIdx, VariantIdx>

Dereferences the value.
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impl<'a> Hash for Layout<'a>

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<'a, __CTX> HashStable<__CTX> for Layout<'a>
where __CTX: HashStableContext,

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fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

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impl<'a> PartialEq for Layout<'a>

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fn eq(&self, other: &Layout<'a>) -> 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<'a> Copy for Layout<'a>

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impl<'a> Eq for Layout<'a>

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impl<'a> StructuralPartialEq for Layout<'a>

Auto Trait Implementations§

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impl<'a> DynSend for Layout<'a>

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impl<'a> DynSync for Layout<'a>

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impl<'a> Freeze for Layout<'a>

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impl<'a> RefUnwindSafe for Layout<'a>

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impl<'a> Send for Layout<'a>

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impl<'a> Sync for Layout<'a>

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impl<'a> Unpin for Layout<'a>

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impl<'a> UnwindSafe for Layout<'a>

Blanket Implementations§

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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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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<Q, K> Equivalent<K> for Q
where 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 Q
where 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 Q
where 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 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> Same for T

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type Output = T

Should always be Self
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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.
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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<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
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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: 8 bytes