Feature Status

Current implementation status of Osprey language features

17 Jan 2025 By Christian Findlay

Current version: 0.1.0-alpha (not yet released)

✅ Complete Features #

Core Language #

  • Variables & Constants: let declarations, immutable by default
  • Data Types: int, string, bool, basic type inference
  • Functions: Function declarations, expression bodies, named arguments (2+ params)
  • String Interpolation: ${} syntax with expressions
  • Pattern Matching: Basic match expressions, wildcards, type annotation patterns
  • Block Expressions: Local scoping, multi-statement blocks
  • Arithmetic Operations: Safe arithmetic returning Result types
  • Boolean Operations: Logical operators and boolean expressions

Advanced Features #

  • Functional Programming:
    • Iterator functions (range, forEach, map, filter, fold)
    • Pipe operator (|>)
    • Function composition and chaining
  • Any Type Handling: Explicit any types with pattern matching requirement
  • Result Types: Error handling without exceptions
  • Type Safety: No implicit conversions, compile-time type checking

Concurrency & HTTP #

  • Fiber-based Concurrency:
    • Lightweight fiber spawning with spawn
    • Fiber isolation and communication
    • await, yield operations
  • HTTP Server:
    • Server creation (httpCreateServer)
    • Request handling with all methods (GET, POST, PUT, DELETE)
    • Concurrent request processing
  • HTTP Client:
    • Client creation (httpCreateClient)
    • All HTTP methods with custom headers
    • Request/response handling
  • WebSocket Support:
    • WebSocket server and client connections
    • Real-time bidirectional communication
    • Military-grade security implementation

Built-in Functions #

  • I/O: print(), input(), toString()
  • Functional Iterators: Complete pipe operator support
  • Safe Math: All arithmetic operations return Result types

🚧 Roadmap Features #

Type System Extensions #

  • Record Types with Constraints: where clause validation (partially implemented)
  • Union Types: Complex algebraic data types with destructuring
  • Generic Types: Type parameters and polymorphism
  • Module System: Fiber-isolated modules with proper imports

Advanced Language Features #

  • Extern Declarations: Full Rust/C interoperability (syntax ready)
  • Advanced Pattern Matching: Constructor patterns, guards, exhaustiveness checking
  • Select Expressions: Channel multiplexing for concurrent operations
  • Streaming Responses: Large HTTP response streaming

Tooling & Ecosystem #

  • Package Manager: Dependency management system
  • Standard Library: Comprehensive built-in functions
  • REPL: Interactive development environment
  • Language Server: Full IDE support beyond VS Code extension

Performance & Optimization #

  • Compile-time Optimization: Dead code elimination, inlining
  • Memory Management: Advanced memory safety features
  • Rust Integration: Seamless Rust library integration

Note: Features marked as complete have working examples in the examples/tested/ directory and pass integration tests.