# Oak Vala Parser
[](https://crates.io/crates/oak-vala)
[](https://docs.rs/oak-vala)
High-performance incremental Vala parser for the oak ecosystem with flexible configuration, optimized for GObject-based application development and GNOME ecosystem integration.
## 🎯 Overview
Oak Vala is a robust parser for the Vala programming language, designed to handle complete Vala syntax including modern object-oriented features and GTK bindings. Built on the solid foundation of oak-core, it provides both high-level convenience and detailed AST generation for Vala analysis and tooling.
## ✨ Features
- **Complete Vala Syntax**: Supports all Vala features including modern specifications
- **GObject Integration**: Handles GObject type system and signals
- **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:
```rust
use oak_vala::{ValaLanguage, ValaParser};
use oak_core::{Parser, source::SourceText, parser::session::ParseSession};
fn main() -> Result<(), Box<dyn std::error::Error>> {
let language = ValaLanguage::default();
let parser = ValaParser::new(&language);
let mut session = ParseSession::<ValaLanguage>::default();
let source = SourceText::new(r#"
public class HelloWorld : Object {
public static int main(string[] args) {
stdout.printf("Hello, World!\n");
return 0;
}
}
"#);
let result = parser.parse(&source, &[], &mut session);
println!("Parsed Vala class successfully.");
Ok(())
}
```
## 📋 Parsing Examples
### Class Parsing
```rust
use oak_vala::{ValaLanguage, ValaParser};
use oak_core::{Parser, source::SourceText, parser::session::ParseSession};
let language = ValaLanguage::default();
let parser = ValaParser::new(&language);
let mut session = ParseSession::<ValaLanguage>::default();
let source = SourceText::new(r#"
public class Calculator : Object {
private double _result;
public double result {
get { return _result; }
set { _result = value; }
}
public Calculator() {
_result = 0.0;
}
public double add(double value) {
_result += value;
return _result;
}
public signal void changed(double new_value);
}
"#);
let result = parser.parse(&source, &[], &mut session);
println!("Parsed Vala class successfully.");
```
### Interface Parsing
```rust
use oak_vala::{ValaLanguage, ValaParser};
use oak_core::{Parser, source::SourceText, parser::session::ParseSession};
let language = ValaLanguage::default();
let parser = ValaParser::new(&language);
let mut session = ParseSession::<ValaLanguage>::default();
let source = SourceText::new(r#"
public interface Drawable {
public abstract void draw(Context ctx);
public virtual void resize(int width, int height) {
// Default implementation
}
}
"#);
let result = parser.parse(&source, &[], &mut session);
println!("Parsed Vala interface successfully.");
```
## 🔧 Advanced Features
### Token-Level Parsing
```rust
use oak_vala::{ValaLanguage, ValaParser};
use oak_core::{Parser, source::SourceText, parser::session::ParseSession};
let language = ValaLanguage::default();
let parser = ValaParser::new(&language);
let mut session = ParseSession::<ValaLanguage>::default();
let source = SourceText::new("public class Test { public int value; }");
let result = parser.parse(&source, &[], &mut session);
// Token information is available in the parse result
```
### Error Handling
```rust
use oak_vala::{ValaLanguage, ValaParser};
use oak_core::{Parser, source::SourceText, parser::session::ParseSession};
let language = ValaLanguage::default();
let parser = ValaParser::new(&language);
let mut session = ParseSession::<ValaLanguage>::default();
let source = SourceText::new(r#"
public class Broken {
public int invalid_method() {
return "not a number"; // Type mismatch
}
public int missing_semicolon // Missing semicolon
public property invalid_prop // Missing type
}
"#);
let result = parser.parse(&source, &[], &mut session);
if let Err(e) = result.result {
println!("Parse error: {:?}", e);
}
```
## 🏗️ AST Structure
The parser generates a comprehensive AST with the following main structures:
- **Class**: Class definitions with inheritance
- **Interface**: Interface definitions
- **Method**: Method and function definitions
- **Property**: Property definitions with getters/setters
- **Signal**: Signal definitions for event handling
- **Namespace**: Namespace declarations
- **Statements**: Assignment, if, loop, try statements
- **Expressions**: Binary, unary, method call expressions
## 📊 Performance
- **Streaming**: Parse large Vala 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-vala integrates seamlessly with:
- **Static Analysis**: Code quality and security analysis
- **Code Generation**: Generating C code from Vala AST
- **IDE Support**: Language server protocol compatibility
- **Refactoring**: Automated code refactoring
- **Documentation**: Generating documentation from Vala code
## 📚 Examples
Check out the [examples](examples/) directory for comprehensive examples:
- Complete Vala class parsing
- Interface and implementation analysis
- Property and signal handling
- Integration with GTK applications
## 🤝 Contributing
Contributions are welcome!
Please feel free to submit pull requests at the [project repository](https://github.com/ygg-lang/oaks/tree/dev/examples/oak-vala) or open [issues](https://github.com/ygg-lang/oaks/issues).