An Interactive Debugger for Rust Trait Errors

An Interactive Debugger for Rust Trait Errors Human developers frequently make simple mistakes. Thankfully, type systems do a great job of statically catching simple mistakes and saving developers time. However, as type errors become more complex, developers may spend significant time trying to understand the error message itself. Imagine writing a social media platform in Rust. Say your application has two tables, users and posts , the latter has a field author_id that is a foreign key into the users table. You want to write a function that fetches all users and their published posts from the database; typing hastily — or accepting code from Copilot — you end up with the following buggy function. (The full code is available here.) fn get_all_published_posts ( conn : &mut PgConnection ) -> QueryResult < Vec <( i32 , String , i32 )>> { users :: table . filter ( posts :: published . eq ( true )) . select (( users :: id , users :: name , posts :: id )) . load ( conn ) } A Rust function ... Read full article.