Struct AttachmentVtable 

pub(super) struct AttachmentVtable {
    type_id: fn() -> TypeId,
    handler_type_id: fn() -> TypeId,
    drop: unsafe fn(NonNull<AttachmentData<Erased>>),
    display: unsafe fn(RawAttachmentRef<'_>, &mut Formatter<'_>) -> Result,
    debug: unsafe fn(RawAttachmentRef<'_>, &mut Formatter<'_>) -> Result,
    preferred_formatting_style: unsafe fn(RawAttachmentRef<'_>, FormattingFunction) -> AttachmentFormattingStyle,
}

Vtable for type-erased attachment operations.

Contains function pointers for performing operations on attachments without knowing their concrete type at compile time.

Fields

type_id: fn() -> TypeId

handler_type_id: fn() -> TypeId

drop: unsafe fn(NonNull<AttachmentData<Erased>>)

display: unsafe fn(RawAttachmentRef<'_>, &mut Formatter<'_>) -> Result

debug: unsafe fn(RawAttachmentRef<'_>, &mut Formatter<'_>) -> Result

preferred_formatting_style: unsafe fn(RawAttachmentRef<'_>, FormattingFunction) -> AttachmentFormattingStyle

Implementations

impl AttachmentVtable

pub(super) const fn new<A: 'static, H: AttachmentHandler<A>>() -> &'static Self

Creates a new AttachmentVtable for the attachment type A and the handler type H.

pub(super) fn type_id(&self) -> TypeId

Gets the TypeId of the attachment type that was used to create this AttachmentVtable.

pub(super) fn handler_type_id(&self) -> TypeId

Gets the TypeId of the handler that was used to create this AttachmentVtable.

pub(super) unsafe fn drop(&self, ptr: NonNull<AttachmentData<Erased>>)

Drops the Box<AttachmentData<A>> instance pointed to by this pointer.

Safety

• The caller must ensure that the pointer comes from a Box<AttachmentData<A>>, which was turned into a pointer using Box::into_raw.
• The attachment type A stored in the AttachmentData must match the A used when creating this AttachmentVtable.
• After calling this method, the pointer must no longer be used.

pub(super) unsafe fn display( &self, ptr: RawAttachmentRef<'_>, formatter: &mut Formatter<'_>, ) -> Result

Formats the attachment using the H::display function used when creating this AttachmentVtable.

Safety

The attachment type A used when creating this AttachmentVtable must match the type stored in the RawAttachmentRef.

pub(super) unsafe fn debug( &self, ptr: RawAttachmentRef<'_>, formatter: &mut Formatter<'_>, ) -> Result

Formats the attachment using the H::debug function used when creating this AttachmentVtable.

Safety

The attachment type A used when creating this AttachmentVtable must match the type stored in the RawAttachmentRef.

pub(super) unsafe fn preferred_formatting_style( &self, ptr: RawAttachmentRef<'_>, report_formatting_function: FormattingFunction, ) -> AttachmentFormattingStyle

Gets the preferred formatting style using the H::preferred_formatting_style function used when creating this AttachmentVtable.

Safety

The attachment type A used when creating this AttachmentVtable must match the type stored in the RawAttachmentRef.