Oak JavaScript Parser

High-performance incremental JavaScript parser for the oak ecosystem with flexible configuration, optimized for static analysis and code generation.

🎯 Overview

Oak JavaScript is a robust parser for JavaScript, designed to handle complete JavaScript syntax including modern features. Built on the solid foundation of oak-core, it provides both high-level convenience and detailed AST generation for static analysis and code generation.

✨ Features

• Complete JavaScript Syntax: Supports all JavaScript features including modern specifications
• Full AST Generation: Generates comprehensive Abstract Syntax Trees
• Lexer Support: Built-in tokenization with proper span information
• Error Recovery: Graceful handling of syntax errors with detailed diagnostics

🚀 Quick Start

Basic example:

use oak_javascript::{Parser, JavaScriptLanguage, SourceText};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let parser = Parser::new();
    let source = SourceText::new(r#"
        function greet(name) {
            console.log('Hello, ' + name + '!');
        }
        
        greet('World');
    "#);
    
    let result = parser.parse(&source);
    println!("Parsed JavaScript successfully.");
    Ok(())
}

📋 Parsing Examples

Function Parsing

use oak_javascript::{Parser, JavaScriptLanguage, SourceText};

let parser = Parser::new();
let source = SourceText::new(r#"
    function add(a, b) {
        return a + b;
    }
"#);

let result = parser.parse(&source);
println!("Parsed JavaScript function successfully.");

Object Parsing

use oak_javascript::{Parser, JavaScriptLanguage, SourceText};

let parser = Parser::new();
let source = SourceText::new(r#"{name: "Alice", age: 30}"#);

let result = parser.parse(&source);
println!("Parsed JavaScript object successfully.");

🔧 Advanced Features

Token-Level Parsing

use oak_javascript::{Parser, JavaScriptLanguage, SourceText};

let parser = Parser::new();
let source = SourceText::new("const x = 42;");
let result = parser.parse(&source);
// Token information is available in the parse result

Error Handling

use oak_javascript::{Parser, JavaScriptLanguage, SourceText};

let parser = Parser::new();
let source = SourceText::new(r#"
    function greet(name) {
        console.log('Hello, ' + name + '!')
    // Missing closing brace
"#);

let result = parser.parse(&source);
if let Err(e) = result.result {
    println!("Parse error: {:?}", e);
}

🏗️ AST Structure

The parser generates a comprehensive AST with the following main structures:

• Script: Root container for JavaScript programs
• Function: JavaScript functions and methods
• VariableDeclaration: Variable and constant declarations
• Expression: Various expression types (binary, unary, call, etc.)
• Statement: Control flow, loops, conditionals

📊 Performance

• Streaming: Parse large JavaScript files without loading entirely into memory
• Incremental: Re-parse only changed sections
• Memory Efficient: Smart AST node allocation
• Fast Recovery: Quick error recovery for better IDE integration

🔗 Integration

Oak JavaScript integrates seamlessly with:

• Static Analysis: Code quality and security analysis
• Code Generation: Generating code from JavaScript AST
• IDE Support: Language server protocol compatibility
• Refactoring: Automated code refactoring
• Documentation: Generating documentation from JavaScript code

📚 Examples

Check out the examples directory for comprehensive examples:

• Complete JavaScript program parsing
• Function and object analysis
• Code transformation
• Integration with development workflows

🤝 Contributing

Contributions are welcome!

Please feel free to submit pull requests at the project repository or open issues.