🪹 Nest

A procedural programming language that compiles to NVM bytecode. Nest is designed to be simple, explicit, and practical.

📖 Overview

proc main() {
    var n = 10;
    var i = 0;
    
    while (i < n) {
        if (i % 2 == 0) {
            print("even: ");
        } else {
            print("odd:  ");
        }
        print(str(i) + "\n");
        i = i + 1;
    }
}

/* ^^^^^
 * Pseudo-code. If you looking for real samples, go to ./samples/
 */

✨ Supported Features

Feature	Status
print() built-in	✅
Integers, strings, booleans	✅
Variables (var x = 5)	✅
Arithmetic (+ - * / %)	✅
Comparisons (< > <= >= == !=)	✅
Logical operators (&& || !)	✅
if / else	✅
while loops	✅
Functions (proc name(args) {})	✅
Recursion	✅
return	✅
Local variables	✅

🧪 Planned

• for loops
• break / continue
• Arrays
• File I/O (open, read, write, close)
• Built-in: len(), int(), str()

🔨 Building

See scripts/install.sh

📁 Project Structure

nest-lang
├── src/
│   ├── main.rb         # Driver
│   ├── lexer.rb        # Tokenizer
│   ├── parser.rb       # AST builder
│   ├── codegen.rb      # NVM assembly generation
│   └── lib/
│       └── reporter.rb # Error reporting lib
├── samples/            # Example programs
└──tools/
    └── disasm.rb       # NVM binary disassembler

🧩 Example: Recursion

proc pyramid(n, max) {
    if (n <= max) {
        var i = 0;
        while (i < n) {
            print("*");
            i = i + 1;
        }
        print("\n");
        pyramid(n + 1, max);
    }
}

proc main() {
    pyramid(1, 6);
}

🚧 Limitations (by design)

• No classes, inheritance, or OOP
• No generics
• No exceptions

📜 License

GPL-3.0 — because sharing is caring.