Cargo Features

[dependencies]
rarena = { version = "0.3.2", default-features = false, features = ["std", "alloc", "memmap"] }
default = std

The std feature is set by default whenever rarena is added without default-features = false somewhere in the dependency tree.

std default memmap?

Enables std of rarena-allocator ^0.3

alloc

Enables alloc of rarena-allocator ^0.3

memmap = std

Enables memmap of rarena-allocator ^0.3

Rarena has 4 features without comments.