Cargo Features

protobuf has no features set by default.

[dependencies]
protobuf = { version = "3.3.0", features = ["with-bytes"] }
with-bytes = bytes

Features from optional dependencies

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

bytes with-bytes?

With default (std)

Affects message::Message.parse_from_tokio_bytes, runtime_types::RuntimeTypeTokioBytes, runtime_types::RuntimeTypeTokioChars, types::ProtobufTypeTokioBytes, types::ProtobufTypeTokioChars