Crate rustc_ap_rustc_arena

The arena, a fast but limited type of allocator.

Arenas are a type of allocator that destroy the objects within, all at once, once the arena itself is destroyed. They do not support deallocation of individual objects while the arena itself is still alive. The benefit of an arena is very fast allocation; just a pointer bump.

This crate implements several kinds of arena.

Macros

arena_for_type
declare_arena
which_arena_for_type

Structs

DropArena	An arena which can be used to allocate any type.
DroplessArena
TypedArena	An arena that can hold objects of only one type.