1 //! Example of instantiating of the WebAssembly module and invoking its exported 2 //! function. 3 4 // You can execute this example with `cargo run --example gcd` 5 6 use wasmtime::*; 7 8 fn main() -> Result<()> { 9 // Load our WebAssembly (parsed WAT in our case), and then load it into a 10 // `Module` which is attached to a `Store` cache. After we've got that we 11 // can instantiate it. 12 let mut store = Store::<()>::default(); 13 let module = Module::from_file(store.engine(), "examples/gcd.wat")?; 14 let instance = Instance::new(&mut store, &module, &[])?; 15 16 // Invoke `gcd` export 17 let gcd = instance.get_typed_func::<(i32, i32), i32>(&mut store, "gcd")?; 18 19 println!("gcd(6, 27) = {}", gcd.call(&mut store, (6, 27))?); 20 Ok(()) 21 } 22