Enum CanonAbi

pub enum CanonAbi {
    C,
    Rust,
    RustCold,
    Custom,
    Arm(ArmCall),
    GpuKernel,
    Interrupt(InterruptKind),
    X86(X86Call),
}

Calling convention to determine codegen

CanonAbi erases certain distinctions ExternAbi preserves, but remains target-dependent. There are still both target-specific variants and aliasing variants, though much fewer. The reason for this step is the frontend may wish to show an ExternAbi but implement that ABI using a different ABI than the string per se, or describe irrelevant differences, e.g.

• extern “system”
• extern “cdecl”
• extern “C-unwind” In that sense, this erases mere syntactic distinctions to create a canonical directive, rather than picking the “actual” ABI.

Variants

C

Rust

RustCold

Custom

An ABI that rustc does not know how to call or define.

Arm(ArmCall)

ABIs relevant to 32-bit Arm targets

GpuKernel

ABI relevant to GPUs: the entry point for a GPU kernel

Interrupt(InterruptKind)

ABIs relevant to bare-metal interrupt targets

X86(X86Call)

ABIs relevant to Windows or x86 targets

Trait Implementations

impl Clone for CanonAbi

fn clone(&self) -> CanonAbi

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CanonAbi

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

Formats the value using the given formatter.

impl Display for CanonAbi

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

Formats the value using the given formatter.

impl Hash for CanonAbi

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 CanonAbi

where __CTX: HashStableContext,

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

impl Ord for CanonAbi

fn cmp(&self, other: &CanonAbi) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for CanonAbi

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

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

const 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 PartialOrd for CanonAbi

fn partial_cmp(&self, other: &CanonAbi) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for CanonAbi

impl Eq for CanonAbi

impl StructuralPartialEq for CanonAbi

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: 2 bytes

Size for each variant:

• C: 0 bytes
• Rust: 0 bytes
• RustCold: 0 bytes
• Custom: 0 bytes
• Arm: 1 byte
• GpuKernel: 0 bytes
• Interrupt: 1 byte
• X86: 1 byte