There are only three. It's simpler to make the type `DiagnosticBuilder<'_, ()>` from the start, no matter the level, than to change the guarantee later.
Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.
There are only three. It's simpler to make the type `DiagnosticBuilder<'_, ()>` from the start, no matter the level, than to change the guarantee later.
Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.