Overlay Language

A dependency injection framework with pytest-fixture syntax, plus a configuration language for declarative programming.

Contents:

• Getting Started with Decorators
  • Step 1 — Define services
  • Step 2 — Layer cross-cutting concerns with @patch and @merge
  • Step 3 — Force evaluation at startup with @eager
  • Step 4 — App scope vs request scope
  • Decorator reference
  • Python modules as scopes
• Getting Started with Overlay Language
  • Python FFI adapters
  • .oyaml composition
  • Syntax quick reference
  • Python vs Overlay language
  • Evaluation
• Overlay Language Specification
  • 1. Introduction
  • 2. Overlay Definitions and Data Types
  • 3. Syntax and Grammar
  • 4. File Structure and Formats
  • 5. Scope and Inheritance Resolution
  • 6. Binding Rules and Examples
  • 7. Appendices
• API Reference
  • Module contents