rustc-ap-arena 660.0.0

Automatically published version of the package `arena` in the rust-lang/rust repository from commit 5943351d0eb878c1cb5af42b9e85e101d8c58ed7 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.