Method get_func

crates/wasmtime/src/runtime/component/instance.rs:155–171

Looks up an exported function by name within this [`Instance`]. The `store` argument provided must be the store that this instance lives within and the `name` argument is the lookup key by which to find the exported function. If the function is found then `Some` is returned and otherwise `None` is returned. The `name` here can be a string such as `&str` or it can be a [`ComponentExportIndex`] wh

(&self, mut store: impl AsContextMut, name: impl ExportLookup)

    /// # }
    /// ```
    pub fn get_func(&self, mut store: impl AsContextMut, name: impl ExportLookup) -> Option<Func> {
        let store = store.as_context_mut().0;
        let instance = self.id.get(store);
        let component = instance.component();

        // Validate that `name` exists within `self.`
        let index = name.lookup(component, None)?;

        // Validate that `index` is indeed a lifted function.
        match &component.env_component().export_items[index] {
            Export::LiftedFunction { .. } => {}
            _ => return None,
        }

        // And package up the indices!
        Some(Func::from_lifted_func(*self, index))
    }

    /// Looks up an exported [`Func`] value by name and with its type.
    ///