Function namespace

crates/cpp/src/lib.rs:778–802

determine namespace (for the lifted C++ function)

(resolve: &Resolve, owner: &TypeOwner, guest_export: bool, opts: &Opts)

// determine namespace (for the lifted C++ function)
fn namespace(resolve: &Resolve, owner: &TypeOwner, guest_export: bool, opts: &Opts) -> Vec<String> {
    let mut result = Vec::default();
    if let Some(prefix) = &opts.internal_prefix {
        result.push(prefix.clone());
    }
    if guest_export {
        result.push(String::from("exports"));
    }
    match owner {
        TypeOwner::World(w) => result.push(to_c_ident(&resolve.worlds[*w].name)),
        TypeOwner::Interface(i) => {
            let iface = &resolve.interfaces[*i];
            let pkg_id = iface.package.unwrap();
            let pkg = &resolve.packages[pkg_id];
            result.push(to_c_ident(&pkg.name.namespace));
            // Use name_package_module to get version-specific package names
            result.push(to_c_ident(&name_package_module(resolve, pkg_id)));
            if let Some(name) = &iface.name {
                result.push(to_c_ident(name));
            }
        }
        TypeOwner::None => (),
    }
    result
}

impl SourceWithState {
    fn change_namespace(&mut self, target: &[String]) {