Cargo Features

[dependencies]
peggen = { version = "0.3.2", default-features = false, features = ["std", "trace", "bumpalo"] }
default = bumpalo

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

std trace?
trace = std
bumpalo default

Enables bumpalo of peggen-core

Peggen has 4 features without comments.