Cargo Features

chisel-json = { version = "1.0.7", default-features = false, features = ["mixed_numerics"] }
default = mixed_numerics

The mixed_numerics feature is set by default whenever chisel-json is added without default-features = false somewhere in the dependency tree.

mixed_numerics default = lexical

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features.

lexical mixed_numerics

With parse-floats, parse-integers and default features