Working with externref

You can also browse this source code online and clone the wasmtime repository to run the example locally:

• Rust
• C
• C++

This example shows how to pass opaque host references into and out of WebAssembly using externref.

Wasm Source

{{#include ../examples/externref.wat}}

Host Source

{{#include ../examples/externref.rs}}

{{#include ../examples/externref.c}}

{{#include ../examples/externref.cc}}