STANDALONE PROOF OF CONCEPT
A runnable, powered by WebAssembly.
Edit the C++, then run it right here. Your browser compiles and executes the program.
RUNNABLE · WASM-LIGHT
Hello, browser.
A real C++ program, compiled locally into WebAssembly.
#include <iostream>
int main() {
std::cout << "Hello from CS 128!\n";
}Program input (stdin)
To run this demo, double-click Launch.command in this folder, then open http://127.0.0.1:5178.
Click Run to compile and execute your code.
This prototype uses a custom compile/link/run pipeline with our Clang 16.0.6 build and libc++. It targets C++20 and enables WebAssembly C++ exceptions. Native sanitizer diagnostics are not included.
How this proof of concept works
All compiler assets are served as static files. Clang compiles each source file, LLD links the objects, and a WASI worker executes the resulting Wasm. The local server serves files only. No source code is sent to a compilation service.
Compilation is limited to 30 seconds per step and execution to 5 seconds. Stop terminates the active worker. Output is capped at 64 KiB.