Method func_wrap

crates/wasmtime/src/runtime/component/linker.rs:473–481

Defines a new host-provided function into this [`LinkerInstance`]. This method is used to give host functions to wasm components. The `func` provided will be callable from linked components with the type signature dictated by `Params` and `Return`. The `Params` is a tuple of types that will come from wasm and `Return` is a value coming from the host going back to wasm. Additionally the `func` ta

(&mut self, name: &str, func: F)

    //
    // TODO: needs more words and examples
    pub fn func_wrap<F, Params, Return>(&mut self, name: &str, func: F) -> Result<()>
    where
        F: Fn(StoreContextMut<T>, Params) -> Result<Return> + Send + Sync + 'static,
        Params: ComponentNamedList + Lift + 'static,
        Return: ComponentNamedList + Lower + 'static,
    {
        self.insert(name, Definition::Func(HostFunc::func_wrap(func)?))?;
        Ok(())
    }

    /// Defines a new host-provided async function into this [`LinkerInstance`].
    ///