Struct rustc_target::abi::Layout

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

Tuple Fields§

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

Implementations§

source§

impl<'a> Layout<'a>

source

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

source

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

source

pub fn abi(self) -> Abi

source

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

source

pub fn align(self) -> AbiAndPrefAlign

source

pub fn size(self) -> Size

source

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

source

pub fn unadjusted_abi_align(self) -> Align

source

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>>§

source

pub fn is_unsized(&self) -> bool

Returns true if the layout corresponds to an unsized type.

source

pub fn is_sized(&self) -> bool

source

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).

source

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.

source

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. Also note that we assume aggregates are passed via PassMode::Indirect or PassMode::Cast; more strict checks would otherwise be required.

Trait Implementations§

source§

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

source§

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

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
source§

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

source§

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

Formats the value using the given formatter. Read more
source§

impl<'a> Deref for Layout<'a>

source§

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

The resulting type after dereferencing.
source§

fn deref(&self) -> &&'a LayoutS<FieldIdx, VariantIdx>

Dereferences the value.
source§

impl<'a> Hash for Layout<'a>

source§

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

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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
source§

impl<'a, __CTX> HashStable<__CTX> for Layout<'a>
where __CTX: HashStableContext,

source§

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

source§

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

source§

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl<'a> Copy for Layout<'a>

source§

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

source§

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

Auto Trait Implementations§

§

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

§

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

§

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

§

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

§

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

§

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

Blanket Implementations§

source§

impl<T> Aligned for T

source§

const ALIGN: Alignment = _

Alignment of Self.
source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> CloneToUninit for T
where T: Clone,

source§

unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> Instrument for T

source§

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> IntoEither for T

source§

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
source§

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
source§

impl<T> Same for T

source§

type Output = T

Should always be Self
source§

impl<T> ToOwned for T
where T: Clone,

source§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

source§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

source§

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

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

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

source§

fn vzip(self) -> V

source§

impl<T> WithSubscriber for T

source§

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
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

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