Rust Result Box Dyn Error. Used instead of a returnYou can try to refactor this code to use map_err and and_then and such instead of if let Err so that the whole thing remains a single expression with a single. When using this operator the function call must be another function that returns Result T E The other method now has to handle the errors.
Represents all the ways that a query can fail. This code above works well enough but it has the limitation that the execute_query method must produce all of the rows up front as a VecMaterialize is after all a streaming database. U32 - Result where Self.
You can click here to open this code in the Rust playground and play around with it.
Empowering everyone to build reliable and efficient software. The Box type is called a trait object. This type is not intended to be exhaustively matched and new variants may be added in the future without a major version bump. Clippy may complain that its a bad style to use stand-alone Err.