Enum repc::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)

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>)

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

pub fn clone(&self) -> Annotation

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Annotation

impl Debug for Annotation

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

Formats the value using the given formatter.

impl Eq for Annotation

impl PartialEq<Annotation> for Annotation

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

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

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

This method tests for !=.

impl StructuralEq for Annotation

impl StructuralPartialEq for Annotation