//! Structural editing for ast.
use crate::{
    AstNode,
    ast::{self, make},
    ted,
};

impl ast::Impl {
    pub fn get_or_create_assoc_item_list(&self) -> ast::AssocItemList {
        if self.assoc_item_list().is_none() {
            let assoc_item_list = make::assoc_item_list(None).clone_for_update();
            ted::append_child(self.syntax(), assoc_item_list.syntax());
        }
        self.assoc_item_list().unwrap()
    }
}