Struct CastTarget 

pub struct CastTarget {
    pub prefix: Vec<Reg>,
    pub rest_offset: Option<MachineSize>,
    pub rest: Uniform,
}

Describes the ABI type that an argument is transmuted to for PassMode::Cast.

When an argument is “cast,” its raw bytes are reinterpreted as a sequence of register-sized values for passing. This struct describes that target layout:

1. The prefix registers are laid out first, like fields of a repr(C) struct (i.e., with alignment padding between them).
2. After the prefix, rest.unit is repeated enough times to cover rest.total, starting at rest_offset (or immediately after the prefix if None).

For example, on x86_64 a struct { i32, f64 } might be cast to a prefix of [Reg::i64()] followed by a rest of Reg::f64() — placing the first 8 bytes in an integer register and the second 8 bytes in a floating-point register.

Fields

prefix: Vec<Reg>

Leading registers of potentially different types, laid out with repr(C) padding.

rest_offset: Option<MachineSize>

The byte offset where rest begins, if explicitly set. When None, rest starts immediately after the prefix.

rest: Uniform

The repeated trailing register type filling the remainder of the value.

Implementations

impl CastTarget

pub fn size(&self) -> Size

Return the total size of the ABI type this argument is cast to.

Trait Implementations

impl Clone for CastTarget

fn clone(&self) -> CastTarget

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CastTarget

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

Formats the value using the given formatter.

impl Eq for CastTarget

impl Hash for CastTarget

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 PartialEq for CastTarget

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for CastTarget

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CastTarget

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: 72 bytes