Cargo Features

[dependencies]
syn-codegen = { version = "0.4.2", default-features = false, features = ["serde"] }
default = serde

The serde feature is set by default whenever syn-codegen is added without default-features = false somewhere in the dependency tree.

serde default

Enables serde and serde_derive, serde of indexmap and semver

syn-codegen has 2 features without comments.