Lib.rs

# RELO

A custom-built programming language interpreter and compiler written in Rust, designed to resemble simple English-like syntax such as:

• VARIABLE x IS 10;
• x ASSIGN x + 1;
• DISPLAY "Hello";
• WHEN condition { ... } OTHERWISE { ... } DONE;
• CREATE FUNCTION myfunc { ... } END_FN;

## 🚀 Features

• ✅ Custom syntax with human-readable keywords (like IS, ASSIGN, DISPLAY, START, END)
• ✅ Support for:
  • Variable declarations and assignment
  • Conditionals (WHEN, OTHERWISE)
  • Loops (REPEAT, LOOP, QUIT)
  • Functions (CREATE FUNCTION, CALL, RETURN)
• ✅ Two execution modes:
  • Tree-walk interpreter
  • Bytecode compiler + virtual machine
• ✅ Rust-powered lexer, parser, and runtime
• ✅ Benchmark-ready with cargo run --release

📂 Project Structure

.
├── lexer/         # Tokenizer for custom keywords and literals
├── parser/        # Builds AST from tokens
├── interpreter/   # Tree-walk interpreter
├── compiler/      # Compiler to bytecode
├── vm/            # Stack-based virtual machine
├── main.rs        # Program entry point
└── README.md

**🧪 Example Program**

START
    VARIABLE i IS 1;
    LOOP i Start 1 End 5 {
        DISPLAY i;
        i ASSIGN i + 1;
    } DONE;
END
Edit
START
    VARIABLE i IS 1;
    LOOP i Start 1 End 5 {
        DISPLAY i;
        i ASSIGN i + 1;
    } DONE;
END
**🏃 Running the Project
🔧 Debug (for development)**

cargo run
**⚡ Release (optimized for speed)**
bash

cargo run --release
🕒 Measure performance
Execution time is printed automatically after the program finishes.

**✍️ Author**
Abdul Mubarak H
📧 abdulmubarak682@gmail.com

****📜 License****
MIT License — Free to use, modify, and distribute.



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Would you like me to:
- Add badges (build status, language, license)?
- Create sample test files?
- Include contribution or usage guidelines?

Let me know and I can customize it even further!