syn-serde

Library to serialize and deserialize Syn syntax trees.

Documentation

Usage

Add this to your Cargo.toml:

[dependencies]
syn-serde = "0.2"

The current syn-serde requires Rust 1.31 or later.

Examples

[dependencies]
syn-serde = { version = "0.2", features = ["json"] }
syn = { version = "1", features = ["full"] }

use syn_serde::json;

let syn_file: syn::File = syn::parse_quote! {
    fn main() {
        println!("Hello, world!");
    }
};

println!("{}", json::to_string_pretty(&syn_file));

This prints the following JSON:

{
  "items": [
    {
      "fn": {
        "ident": "main",
        "inputs": [],
        "output": null,
        "stmts": [
          {
            "semi": {
              "macro": {
                "path": {
                  "segments": [
                    {
                      "ident": "println"
                    }
                  ]
                },
                "delimiter": "paren",
                "tokens": [
                  {
                    "lit": "\"Hello, world!\""
                  }
                ]
              }
            }
          }
        ]
      }
    }
  ]
}

Rust source file -> JSON representation of the syntax tree

The rust2json example parse a Rust source file into a syn_serde::File and print out a JSON representation of the syntax tree.

JSON file -> Rust syntax tree

The json2rust example parse a JSON file into a syn_serde::File and print out a Rust syntax tree.

Optional features

• json — Provides functions for JSON <-> Rust serializing and deserializing.

Relationship to Syn

syn-serde is a fork of Syn, and syn-serde provides a set of data structures similar but not identical to Syn. All data structures provided by syn-serde can be converted to the data structures of Syn and proc-macro2.

The data structures of syn-serde 0.2 is compatible with the data structures of Syn 1.0.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.