For instance, last time I checked them out (in MSVC) it was perfectly fine to expose an un-exported type via an exported function. Apparently this is by design.

For instance, last time I checked them out (in MSVC) it was perfectly fine to expose an un-exported type via an exported function. Apparently this is by design. In Rust, such a thing is an error. https://play.rust-lang.org/?version=stable&mode=debug&edition=2015&gist=16a67062304ba6856b9a924a75ea96d1 https://play.rust-lang.org/?version=stable&mode=debug&editio...