JASN

A Rust library for parsing and formatting JASN (Just Another Serialization Notation).

JASN is a human-readable data serialization format similar to JSON but with explicit integer and binary types, plus convenient JSON5-inspired syntax features.

Quick Start

use jasn::parse;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let value = parse(r#"
        {
          name: "Alice",
          age: 30,
          balance: 1_234.56,
          data: b64"SGVsbG8=",
          tags: ["rust", "json", "parser"],
        }
    "#)?;
    
    println!("{:#?}", value);
    Ok(())
}

Features

• Distinct Types: Separate i64 integers and f64 floats
• Raw Binary Data: Native b64"..." (base64) and hex"..." (hex) literals
• Timestamps: ISO8601/RFC3339 timestamps with ts"..." syntax
• Comments: Block comments (/* */) only (whitespace-agnostic design)
• Flexible Syntax: Trailing commas, single quotes, unquoted object keys
• Multiple Radixes: Hexadecimal (0x), binary (0b), and octal (0o) integers
• Permissive Numbers: Leading/trailing decimal points (.5, 5.), underscores (1_000_000), inf, -inf, nan

Installation

[dependencies]
jasn = "0.2"

For more examples and documentation, see the main repository README.

License

MIT License - see LICENSE file for details.