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
main() -> Result<()>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