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Next Language 🚀

Next is a powerful Generic Interface Definition Language (IDL) designed to create highly customized code across multiple programming languages. It leverages a flexible template system to transform high-level specifications into language-specific implementations.

Language Specification | API

Screenshot

Screenshot

✨ Key Features

  • 🌐 Multi-language code generation from a single source
  • 📝 Powerful templating system based on Go's text/template
  • 🧩 Flexible customization through template inheritance and overloading
  • 🏗️ Rich type system supporting interfaces, structs, enums, and various data types
  • 🏷️ Annotation support for metadata and customization

📚 Built-in Language Support

Next includes built-in templates for various languages, including C, C++, C#, Go, Java, JavaScript, Kotlin, Lua, Objective-C, PHP, Protobuf, Python, R, Rust, Swift, TypeScript. These serve as a foundation for code generation and can be easily customized or extended using the template hierarchy system.

🛠️ Template System

Next uses a template system based on Go's text/template package, with custom enhancements for code generation. Templates in Next use the .npl file extension.

📊 Template Hierarchy and Inheritance

Next implements a three-layer template hierarchy, allowing for easy customization and overriding of default behaviors:

  1. Next builtin base templates: next/<object_type>
  2. Next builtin language-specific templates: next/<lang>/<object_type>
  3. User-defined language-specific templates: <lang>/<object_type>

This hierarchy enables a powerful inheritance and overloading mechanism, similar to class inheritance in object-oriented programming.

When rendering a template, Next searches for the most specific template first (user-defined), then falls back to language-specific templates, and finally to base templates if no overrides are found.

📖 Documentation

For detailed information on Next's syntax, features, and usage, please visit the official website at https://next.as. The website provides comprehensive documentation, tutorials, and examples to help you get started with Next and make the most of its capabilities.

📝 TODO

  • Support more built-in templates for additional programming languages

🤝 Contributing

We welcome contributions to Next Language! Please see our Contribution Guidelines for more information on how to get started.

📄 License

Next is released under the MIT License.