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Compiler - WASM Backend

Difficulty: 🟡 Intermediate
Time: 20 minutes

Features

Support Status

Feature Status
Basics ✅ Complete
Arrays/Pointers ✅ Complete
Generics ✅ Complete
with ✅ Complete

Auto Implementation with with

The following interfaces can be automatically implemented using the with keyword:

Interface Functionality Generated Method
Eq Equality operator ==(T other)
Ord Ordering operator <(T other)
Clone Copying clone()
Hash Hashing hash()
Debug Debug display debug()
Display Stringify toString() 
// Auto-implement multiple interfaces
struct Point with Eq, Ord, Clone {
    int x;
    int y;
}

int main() {
    Point p1 = Point(10, 20);
    Point p2 = p1.clone();
    
    if (p1 == p2) {
        println("equal");  // Printed
    }
    return 0;
}

Running WASM

# Compile to WASM
cm compile program.cm --target=wasm -o program.wasm

# Run with wasmtime
wasmtime program.wasm

# Run in Browser (Future)
# <script src="program.wasm"></script>

Use Cases

  1. Browser Apps
    • Web Applications
    • Game Development
    • Data Visualization
  2. Serverless
    • Cloudflare Workers
    • Fastly Compute@Edge
    • AWS Lambda (Custom Runtime)
  3. Sandboxed Environments
    • Secure Code Execution
    • Plugin Systems

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Completion: Tutorial Completed!

Last Updated: 2026-02-08