Module vtable 

Vtable for type-erased attachment operations.

This module contains the AttachmentVtable which enables calling handler methods on attachments when their concrete attachment type A and handler type H have been erased. The vtable stores function pointers that dispatch to the correct typed implementations.

This module encapsulates the fields of AttachmentVtable so they cannot be accessed directly. This visibility restriction guarantees the safety invariant: the vtable’s type parameters must match the actual attachment type and handler stored in the AttachmentData.

Safety Invariant

This invariant is maintained because vtables are created as &'static references via AttachmentVtable::new, which pairs the function pointers with specific types A and H at compile time.

Structs

AttachmentVtable 🔒

Vtable for type-erased attachment operations.

Functions

debug 🔒 ^⚠

Formats an attachment using its handler’s debug implementation.

display 🔒 ^⚠

Formats an attachment using its handler’s display implementation.

drop 🔒 ^⚠

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

preferred_formatting_style 🔒 ^⚠

Gets the preferred formatting style using the H::preferred_formatting_style function.