JSON Parser in Rust

This is a simple JSON parser implemented in Rust. It supports parsing JSON values, including strings, numbers, booleans, null, arrays, and objects.

Features

• Parses JSON strings into a Value enum
• Supports numbers, booleans, null, arrays, and objects
• Provides error handling for invalid JSON inputs
• Includes unit tests for validation

Usage

Parsing JSON Strings

use json_parser::Value;

fn main() {
    let json = "{\"key\": \"value\"}";
    if let Some(parsed) = Value::from_str(json) {
        println!("Parsed JSON: {:?}", parsed);
    } else {
        println!("Invalid JSON");
    }
}

Supported JSON Types

The parser supports the following JSON structures:

• String: "hello"
• Number: 42, 3.14, -123
• Boolean: true, false
• Null: null
• Array: [1, 2, 3], ["a", null, true]
• Object: { "key": "value" }, { "nested": { "inner": 42 } }

Implementation

The parser consists of two main modules:

• Scanner: Tokenizes the input string into JSON tokens.
• Parser: Converts tokens into the Value enum representation.