diff --git a/lib/rs/src/lib.rs b/lib/rs/src/lib.rs
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+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//! Rust runtime library for the Apache Thrift RPC system.
+//!
+//! This crate implements the components required to build a working
+//! Thrift server and client. It is divided into the following modules:
+//!
+//! 1. errors
+//! 2. protocol
+//! 3. transport
+//! 4. server
+//! 5. autogen
+//!
+//! The modules are layered as shown in the diagram below. The `generated`
+//! layer is generated by the Thrift compiler's Rust plugin. It uses the
+//! types and functions defined in this crate to serialize and deserialize
+//! messages and implement RPC. Users interact with these types and services
+//! by writing their own code on top.
+//!
+//! ```text
+//! +-----------+
+//! | user app  |
+//! +-----------+
+//! | autogen'd | (uses errors, autogen)
+//! +-----------+
+//! |  protocol |
+//! +-----------+
+//! | transport |
+//! +-----------+
+//! ```
+
+#![crate_type = "lib"]
+#![doc(test(attr(allow(unused_variables), deny(warnings))))]
+
+extern crate byteorder;
+extern crate integer_encoding;
+extern crate try_from;
+
+#[macro_use]
+extern crate log;
+
+// NOTE: this macro has to be defined before any modules. See:
+// https://danielkeep.github.io/quick-intro-to-macros.html#some-more-gotchas
+
+/// Assert that an expression returning a `Result` is a success. If it is,
+/// return the value contained in the result, i.e. `expr.unwrap()`.
+#[cfg(test)]
+macro_rules! assert_success {
+    ($e: expr) => {
+        {
+            let res = $e;
+            assert!(res.is_ok());
+            res.unwrap()
+        }
+    }
+}
+
+pub mod protocol;
+pub mod server;
+pub mod transport;
+
+mod errors;
+pub use errors::*;
+
+mod autogen;
+pub use autogen::*;
+
+/// Result type returned by all runtime library functions.
+///
+/// As is convention this is a typedef of `std::result::Result`
+/// with `E` defined as the `thrift::Error` type.
+pub type Result<T> = std::result::Result<T, self::Error>;