pub struct LayoutS {
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§
Trait Implementations§
source§impl<__CTX> HashStable<__CTX> for LayoutSwhere
__CTX: HashStableContext,
impl<__CTX> HashStable<__CTX> for LayoutSwhere __CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
source§impl PartialEq<LayoutS> for LayoutS
impl PartialEq<LayoutS> for LayoutS
impl Eq for LayoutS
impl StructuralEq for LayoutS
impl StructuralPartialEq for LayoutS
Auto Trait Implementations§
impl RefUnwindSafe for LayoutS
impl Send for LayoutS
impl Sync for LayoutS
impl Unpin for LayoutS
impl UnwindSafe for LayoutS
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
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:312 bytes