Struct rustc_target::abi::Layout

pub struct Layout {
    pub fields: FieldsShape,
    pub variants: Variants,
    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

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

impl Layout

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

Trait Implementations

impl Debug for Layout

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

Formats the value using the given formatter.

impl Hash for Layout

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

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

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

impl PartialEq<Layout> for Layout

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

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

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

This method tests for !=.

impl Eq for Layout

impl StructuralEq for Layout

impl StructuralPartialEq for Layout

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: 320 bytes