Oak TypeScript Parser

High-performance incremental TypeScript parser for the oak ecosystem with flexible configuration, optimized for modern JavaScript development.

🎯 Overview

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

✨ Features

• Complete TypeScript Syntax: Supports all TypeScript 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_core::{Parser, SourceText, parser::session::ParseSession};
use oak_typescript::{TypeScriptParser, TypeScriptLanguage};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let config = TypeScriptLanguage::standard();
    let mut session = ParseSession::<TypeScriptLanguage>::default();
    let parser = TypeScriptParser::new(&config);
    let source = SourceText::new(r#"
interface User {
    id: number;
    name: string;
    email?: string;
}

function greet(user: User): string {
    return `Hello, ${user.name}!`;
}
    "#);
    
    let result = parser.parse(&source, &[], &mut session);
    println!("Parsed TypeScript code successfully.");
    Ok(())
}

📋 Parsing Examples

Interface Parsing

use oak_core::{Parser, SourceText, parser::session::ParseSession};
use oak_typescript::{TypeScriptParser, TypeScriptLanguage};

let config = TypeScriptLanguage::standard();
let mut session = ParseSession::<TypeScriptLanguage>::default();
let parser = TypeScriptParser::new(&config);
let source = SourceText::new(r#"
interface User {
    id: number;
    name: string;
    email?: string;
    roles: string[];
}
"#);

let result = parser.parse(&source, &[], &mut session);
println!("Parsed TypeScript interface successfully.");

Function Parsing

use oak_core::{Parser, SourceText, parser::session::ParseSession};
use oak_typescript::{TypeScriptParser, TypeScriptLanguage};

let config = TypeScriptLanguage::standard();
let mut session = ParseSession::<TypeScriptLanguage>::default();
let parser = TypeScriptParser::new(&config);
let source = SourceText::new(r#"
function calculateTotal(items: Item[]): number {
    return items.reduce((sum, item) => sum + item.price, 0);
}
"#);

let result = parser.parse(&source, &[], &mut session);
println!("Parsed TypeScript function successfully.");

Class Parsing

use oak_core::{Parser, SourceText, parser::session::ParseSession};
use oak_typescript::{TypeScriptParser, TypeScriptLanguage};

let config = TypeScriptLanguage::standard();
let mut session = ParseSession::<TypeScriptLanguage>::default();
let parser = TypeScriptParser::new(&config);
let source = SourceText::new(r#"
class UserService {
    private users: User[] = [];
    
    constructor(private apiClient: ApiClient) {}
    
    async getUser(id: number): Promise<User> {
        return this.apiClient.get(`/users/${id}`);
    }
}
"#);

let result = parser.parse(&source, &[], &mut session);
println!("Parsed TypeScript class successfully.");

🔧 Advanced Features

Token-Level Parsing

use oak_core::{Parser, SourceText, parser::session::ParseSession};
use oak_typescript::{TypeScriptParser, TypeScriptLanguage};

let config = TypeScriptLanguage::standard();
let mut session = ParseSession::<TypeScriptLanguage>::default();
let parser = TypeScriptParser::new(&config);
let source = SourceText::new("const x: number = 42;");
let result = parser.parse(&source, &[], &mut session);
// Token information is available in the parse result

Error Handling

use oak_core::{Parser, SourceText, parser::session::ParseSession};
use oak_typescript::{TypeScriptParser, TypeScriptLanguage};

let config = TypeScriptLanguage::standard();
let mut session = ParseSession::<TypeScriptLanguage>::default();
let parser = TypeScriptParser::new(&config);
let source = SourceText::new(r#"
interface User {
    name: string
    age: number;
}
"#);

let result = parser.parse(&source, &[], &mut session);
if let Some(errors) = result.result.err() {
    println!("Parse error: {:?}", errors);
}

🏗️ AST Structure

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

• SourceFile: Root container for TypeScript source files
• InterfaceDeclaration: TypeScript interface definitions
• ClassDeclaration: TypeScript class definitions
• FunctionDeclaration: Function and method definitions
• VariableStatement: Variable declarations
• Expression: Various expression types
• TypeAnnotation: Type annotations and type references

📊 Performance

• Streaming: Parse large TypeScript 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 of typescript integrates seamlessly with:

• Web Development: Build TypeScript development tools and analyzers
• IDE Support: Language server protocol compatibility for TypeScript
• Build Tools: Integrate with bundlers and build pipelines
• Code Analysis: Analyze and understand TypeScript codebases
• Documentation Tools: Extract documentation from TypeScript source code

📚 Examples

Check out the examples directory for comprehensive examples:

• Complete TypeScript source file parsing
• Interface and class analysis
• Type extraction and validation
• Integration with development workflows

🤝 Contributing

Contributions are welcome!

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