SerenityOS author: "Rust is a neat language, but without inheritance and virtual dispatch, it's extremely cumbersome to build GUI applications"

kixik@lemmy.ml · 3 年前

SerenityOS author: "Rust is a neat language, but without inheritance and virtual dispatch, it's extremely cumbersome to build GUI applications"

Tin Švagelj@mastodon.social · 3 年前

@kixik Inheritance can always be substituted by composition which is what #Rust does pretty well. Constexpr isn’t on C++ level, but I guess you can generate code from build script so there’s ways around it.
As for virtual functions - Traits are effectively to virtual function lookup table declarations that get used by dyn SomeTrait type. So calling a fn on Box\<dyn T\> generates VMT lookup.

Tin Švagelj@mastodon.social · 3 年前

@kixik Thanks to good macro system Rust can (via enum_dispatch) transform those lookups into a switch statement which is best of both worlds IMO.

nachtigall@feddit.de · 3 年前

Oh please not. Spare us from the C++ type-polymorphy nightmare. Traits are so much better than inheritance.