Enum repc_impl::layout::Annotation

pub enum Annotation {
    PragmaPack(u64),
    AttrPacked,
    Align(Option<u64>),
}

An annotation of a type or field.

Builtin types, arrays, and opaque types cannot be annotated.

Variants

PragmaPack(u64)

Tuple Fields

0: u64

The PragmaPack annotation.

This cannot be used on fields. At most one of these can be used on a type.

If the argument is n, it corresponds to #pragma pack(n/8) in C. If n is not a multiple of 8, this annotation will be ignored.

AttrPacked

The AttrPacked annotation.

This corresponds to __attribute__((packed)) in C. On MSVC targets, the behavior is the behavior of Clang.

Align(Option<u64>)

Tuple Fields

0: Option<u64>

The Aligned annotation.

If the argument is Some(n), n must be a power of two and at least 8. It is the corresponding C argument but in bits instead of bytes.

If the argument is Some(n), it corresponds to __declspec(align(n/8)) on MSVC targets and __attribute__((aligned(n/8))) otherwise.

If the argument is None, it corresponds to __attribute__((aligned)). On MSVC targets, the behavior is the behavior of Clang.

Trait Implementations

impl Clone for Annotation

fn clone(&self) -> Annotation

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Annotation

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

Formats the value using the given formatter.

impl PartialEq<Annotation> for Annotation

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Copy for Annotation

impl Eq for Annotation

impl StructuralEq for Annotation

impl StructuralPartialEq for Annotation