itertools = "0.10.1"
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
tracing = "0.1"
+either = "1"
rustc_ast = { path = "../rustc_ast" }
rustc_attr = { path = "../rustc_attr" }
rustc_data_structures = { path = "../rustc_data_structures" }