Cargo Features

[dependencies]
o2o-macros = { version = "0.5.1-beta1", default-features = false, features = ["syn1", "syn2"] }
default = syn1

The syn1 feature is set by default whenever o2o-macros is added without default-features = false somewhere in the dependency tree.

syn1 default

Enables syn ^1.0.3, syn of o2o-impl

syn2

Enables syn, syn2 of o2o-impl

o2o-macros has 3 features without comments.