Enum RustField 

pub enum RustField {
    Member(usize),
    Bits {
        name: String,
        offset: u64,
        bytes: u64,
    },
    Pad {
        name: String,
        bytes: u64,
    },
    Align {
        name: String,
        align: u64,
    },
}

One field of the generated Rust item.

A record without bit-fields maps one C member onto one Rust field, and this is simply its member list. Bit-fields break that correspondence: they share storage, they may be unnamed, and the bytes they occupy do not always start where #[repr(C)] would put the next field on its own.

Variants

Member(usize)

A C member, by its index in RecordDef::fields.

Bits

The bytes one maximal run of bit-fields lives in.

Fields

name: String

The field name, __cinrs_bitsN.

offset: u64

The byte offset of the run within the record.

bytes: u64

How many bytes it covers.

Pad

Filler that puts the field after it where C puts it.

Fields

name: String

The field name, __cinrs_padN.

bytes: u64

How many bytes it covers.

Align

A zero-sized field whose only job is to raise the item’s alignment.

#[repr(C, align(N))] says the same thing and reads better, so it is what a record normally carries. A record that is a member of a packed one cannot use it: Rust refuses a packed type that transitively holds a #[repr(align)] one (E0588), while C is perfectly happy to pack such a member. A [uN; 0] field costs no bytes, raises the alignment the same way, and is not a repr(align) type.

Fields

name: String

The field name, __cinrs_alignN.

align: u64

The alignment it carries, in bytes.

Trait Implementations

impl Clone for RustField

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RustField

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

Formats the value using the given formatter.