Struct rustc_abi::LayoutS

source ·
pub struct LayoutS<V: Idx> {
    pub fields: FieldsShape,
    pub variants: Variants<V>,
    pub abi: Abi,
    pub largest_niche: Option<Niche>,
    pub align: AbiAndPrefAlign,
    pub size: Size,
}

Fields§

§fields: FieldsShape

Says where the fields are located within the layout.

§variants: Variants<V>

Encodes information about multi-variant layouts. Even with Multiple variants, a layout still has its own fields! Those are then shared between all variants. One of them will be the discriminant, but e.g. generators can have more.

To access all fields of this layout, both fields and the fields of the active variant must be taken into account.

§abi: Abi

The abi defines how this data is passed between functions, and it defines value restrictions via valid_range.

Note that this is entirely orthogonal to the recursive structure defined by variants and fields; for example, ManuallyDrop<Result<isize, isize>> has Abi::ScalarPair! So, even with non-Aggregate abi, fields and variants have to be taken into account to find all fields of this layout.

§largest_niche: Option<Niche>

The leaf scalar with the largest number of invalid values (i.e. outside of its valid_range), if it exists.

§align: AbiAndPrefAlign§size: Size

Implementations§

source§

impl<V: Idx> LayoutS<V>

source

pub fn scalar<C: HasDataLayout>(cx: &C, scalar: Scalar) -> Self

source§

impl<V: Idx> LayoutS<V>

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_zst(&self) -> bool

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

Trait Implementations§

source§

impl<V: Clone + Idx> Clone for LayoutS<V>

source§

fn clone(&self) -> LayoutS<V>

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<V: Idx> Debug for LayoutS<V>

source§

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

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

impl<V: Hash + Idx> Hash for LayoutS<V>

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<V, __CTX> HashStable<__CTX> for LayoutS<V>where
    __CTX: HashStableContext,
    V: HashStable<__CTX> + Idx,

source§

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

source§

impl<V: PartialEq + Idx> PartialEq<LayoutS<V>> for LayoutS<V>

source§

fn eq(&self, other: &LayoutS<V>) -> bool

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

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.
source§

impl<V: Eq + Idx> Eq for LayoutS<V>

source§

impl<V: Idx> StructuralEq for LayoutS<V>

source§

impl<V: Idx> StructuralPartialEq for LayoutS<V>

Auto Trait Implementations§

§

impl<V> RefUnwindSafe for LayoutS<V>where
    V: RefUnwindSafe,

§

impl<V> Send for LayoutS<V>where
    V: Send,

§

impl<V> Sync for LayoutS<V>where
    V: Sync,

§

impl<V> Unpin for LayoutS<V>where
    V: Unpin,

§

impl<V> UnwindSafe for LayoutS<V>where
    V: UnwindSafe,

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

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

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

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

const: unstable · source§

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

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

const: unstable · 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> ToOwned for Twhere
    T: Clone,

§

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 Twhere
    U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.
source§

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

§

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

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.

Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.