A strongly typed JSON serialization and deserialization library for Rust, part of the Serde framework.
Serde JSON is a JSON serialization and deserialization library for Rust that is part of the Serde framework. It allows developers to convert between JSON data and Rust data structures efficiently, supporting both strongly typed and untyped representations. It solves the problem of safely and performantly handling JSON, a ubiquitous data format, in Rust applications.
Rust developers building applications that need to consume or produce JSON data, such as web APIs, configuration files, or data processing tools. It is particularly valuable for those requiring type safety, high performance, or compatibility with embedded systems.
Developers choose Serde JSON for its seamless integration with Rust's type system via Serde, providing compile-time safety and IDE support. Its exceptional performance, flexibility in handling both typed and untyped JSON, and support for no-std environments make it the de facto standard for JSON in Rust.
Strongly typed JSON library for Rust
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Uses Serde's derive macros to automatically map JSON to Rust structs, ensuring compile-time checks and IDE autocompletion, as shown in the typed example.
Benchmarks claim deserialization up to 1000 MB/s and serialization up to 900 MB/s, making it competitive with fast C/C++ libraries.
Provides serde_json::Value for dynamic JSON manipulation, useful when the schema is unknown, though it requires careful error handling.
The json! macro allows inline JSON construction with natural syntax and variable interpolation, as demonstrated in the README examples.
Working with serde_json::Value is error-prone; the README admits that typos like v['nmae'] go undetected by the compiler, leading to runtime issues.
Setting up strongly typed parsing requires deriving Serde traits and defining structs, which adds overhead for quick or simple JSON tasks.
While it supports no-std with the 'alloc' feature, it still requires a memory allocator; for true no-alloc environments, a separate crate like serde-json-core is needed.