Serde is a framework for serializing and deserializing Rust data structures efficiently and generically.
The Serde ecosystem consists of data structures that know how to serialize and deserialize themselves along with data formats that know how to serialize and deserialize other things. Serde provides the layer by which these two groups interact with each other, allowing any supported data structure to be serialized and deserialized using any supported data format.
See the Serde website https://serde.rs/ for additional documentation and usage examples.
Where many other languages rely on runtime reflection for serializing data,
Serde is instead built on Rust’s powerful trait system. A data structure
that knows how to serialize and deserialize itself is one that implements
Deserialize traits (or uses Serde’s derive
attribute to automatically generate implementations at compile time). This
avoids any overhead of reflection or runtime type information. In fact in
many situations the interaction between data structure and data format can
be completely optimized away by the Rust compiler, leaving Serde
serialization to perform the same speed as a handwritten serializer for the
specific selection of data structure and data format.
The following is a partial list of data formats that have been implemented for Serde by the community.
- Postcard, a no_std and embedded-systems friendly compact binary format.
- CBOR, a Concise Binary Object Representation designed for small message size without the need for version negotiation.
- YAML, a self-proclaimed human-friendly configuration language that ain’t markup language.
- MessagePack, an efficient binary format that resembles a compact JSON.
- TOML, a minimal configuration format used by Cargo.
- Pickle, a format common in the Python world.
- RON, a Rusty Object Notation.
- BSON, the data storage and network transfer format used by MongoDB.
- Avro, a binary format used within Apache Hadoop, with support for schema definition.
- JSON5, a superset of JSON including some productions from ES5.
- URL query strings, in the x-www-form-urlencoded format.
- Envy, a way to deserialize environment variables into Rust structs. (deserialization only)
- Envy Store, a way to deserialize AWS Parameter Store parameters into Rust structs. (deserialization only)
- S-expressions, the textual representation of code and data used by the Lisp language family.
- D-Bus’s binary wire format.
- FlexBuffers, the schemaless cousin of Google’s FlatBuffers zero-copy serialization format.
- Bencode, a simple binary format used in the BitTorrent protocol.
- Token streams, for processing Rust procedural macro input. (deserialization only)
- DynamoDB Items, the format used by rusoto_dynamodb to transfer data to and from DynamoDB.
- Hjson, a syntax extension to JSON designed around human reading and editing. (deserialization only)
Deserializerpart of a new data format for Serde.