Enum Abi

pub enum Abi {
    Uninhabited,
    Scalar(Scalar),
    ScalarPair(Scalar, Scalar),
    Vector {
        element: Scalar,
        count: u64,
    },
    Aggregate {
        sized: bool,
    },
}

Describes how values of the type are passed by target ABIs, in terms of categories of C types there are ABI rules for.

Variants

Uninhabited

Scalar(Scalar)

ScalarPair(Scalar, Scalar)

Vector

Fields

element: Scalar

count: u64

Aggregate

Fields

sized: bool

If true, the size is exact, otherwise it’s only a lower bound.

Implementations

impl Abi

pub fn is_unsized(&self) -> bool

Returns true if the layout corresponds to an unsized type.

pub fn is_sized(&self) -> bool

pub fn is_signed(&self) -> bool

Returns true if this is a single signed integer scalar

pub fn is_uninhabited(&self) -> bool

Returns true if this is an uninhabited type

pub fn is_scalar(&self) -> bool

Returns true if this is a scalar type

pub fn is_bool(&self) -> bool

Returns true if this is a bool

pub fn inherent_align<C: HasDataLayout>( &self, cx: &C, ) -> Option<AbiAndPrefAlign>

Returns the fixed alignment of this ABI, if any is mandated.

pub fn inherent_size<C: HasDataLayout>(&self, cx: &C) -> Option<Size>

Returns the fixed size of this ABI, if any is mandated.

pub fn to_union(&self) -> Self

Discard validity range information and allow undef.

pub fn eq_up_to_validity(&self, other: &Self) -> bool

Trait Implementations

impl Clone for Abi

fn clone(&self) -> Abi

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Abi

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

Formats the value using the given formatter.

impl Hash for Abi

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<__CTX> HashStable<__CTX> for Abi

where __CTX: HashStableContext,

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

impl PartialEq for Abi

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for Abi

impl Eq for Abi

impl StructuralPartialEq for Abi

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: 96 bytes

Size for each variant:

• Uninhabited: 0 bytes
• Scalar: 64 bytes
• ScalarPair: 96 bytes
• Vector: 80 bytes
• Aggregate: 5 bytes