Trait abi_stable::prefix_type::PrefixTypeTrait

pub unsafe trait PrefixTypeTrait: Sized {
type Prefix;

const METADATA: WithMetadataFor<Self, Self::Prefix>;
const PT_LAYOUT: &'static PTStructLayout;
const PT_FIELD_ACCESSIBILITY: FieldAccessibility;
    fn into_with_metadata(self) -> WithMetadata<Self> { ... }
    fn leak_into_prefix<'a>(self) -> &'a Self::Prefix
    where
        Self: 'a,
        Self::Prefix: 'a,
    { ... }
}

For types deriving StableAbi with #[sabi(kind(Prefix(..)))].

Associated Types

type Prefix

A type only accessible through a shared reference.

The fields after the #[sabi(last_prefix_field)] attribute are only potentially accessible in their <field_name> methods, since their existence has to be checked at runtime. This is because multiple versions of the library may be loaded, where in some of them those fields don't exist.

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Associated Constants

const METADATA: WithMetadataFor<Self, Self::Prefix>

Just the metadata of Self,for passing to WithMetadata::new, with WithMetadata::new(PrefixTypeTrait::METADATA,value)

const PT_LAYOUT: &'static PTStructLayout

Describes the layout of the struct,exclusively for use in error messages.

const PT_FIELD_ACCESSIBILITY: FieldAccessibility

A bit array,where the bit at the field index represents whether that field is accessible.

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Provided methods

fn into_with_metadata(self) -> WithMetadata<Self>

Converts self to a WithMetadata<Self>,.

fn leak_into_prefix<'a>(self) -> &'a Self::Prefix where
    Self: 'a,
    Self::Prefix: 'a, 

Convers Self to its WithMetadata<Self>, then leaks it and casts it to &'a Self::Prefix.

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Implementors

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