Enum EnumRepr 

#[repr(C)]
pub enum EnumRepr {
    Rust = 0,
    RustNPO = 1,
    U8 = 2,
    U16 = 3,
    U32 = 4,
    U64 = 5,
    USize = 6,
    I8 = 7,
    I16 = 8,
    I32 = 9,
    I64 = 10,
    ISize = 11,
}

All possible representations for Rust enums — ie. the type/size of the discriminant

Variants

Rust = 0

Default Rust enum representation with unspecified discriminant layout.

The compiler chooses the discriminant size and layout as an implementation detail. Reflection operations that require knowing the discriminant layout will fail for enums with this repr.

RustNPO = 1

Special-case representation discriminated by zeros under non-nullable pointer

See: https://rust-lang.github.io/unsafe-code-guidelines/layout/enums.html#discriminant-elision-on-option-like-enums

U8 = 2

u8 representation (#[repr(u8)])

U16 = 3

u16 representation (#[repr(u16)])

U32 = 4

u32 representation (#[repr(u32)])

U64 = 5

u64 representation (#[repr(u64)])

USize = 6

usize representation (#[repr(usize)])

I8 = 7

i8 representation (#[repr(i8)])

I16 = 8

i16 representation (#[repr(i16)])

I32 = 9

i32 representation (#[repr(i32)])

I64 = 10

i64 representation (#[repr(i64)])

ISize = 11

isize representation (#[repr(isize)])

Implementations

impl EnumRepr

pub const fn from_discriminant_size<T>() -> Self

Returns the enum representation for the given discriminant type

NOTE: only supports unsigned discriminants

Panics

Panics if the size of the discriminant size is not 1, 2, 4, or 8 bytes.

Trait Implementations

impl Clone for EnumRepr

fn clone(&self) -> EnumRepr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EnumRepr

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

Formats the value using the given formatter.

impl Hash for EnumRepr

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 EnumRepr

fn eq(&self, other: &EnumRepr) -> 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 EnumRepr

impl Eq for EnumRepr

impl StructuralPartialEq for EnumRepr