rustc-ap-arena 661.0.0

Automatically published version of the package `arena` in the rust-lang/rust repository from commit 9eedd138ee22147111a885d6948fb050d9849bf4 The publishing script for this crate lives at:

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.