Why can't `Self` be used to refer to an enum's variant in a method body?

Question

This question is now obsolete because this feature has been implemented. Related answer.

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The following Rust code fails to compile:

enum Foo {
          


        

Answer 1

There is an experimental feature that would make your example work without any other changes. You can try it out in a nightly build of Rust by adding this in your main file:

#![feature(type_alias_enum_variants)]

You can follow the progress of the feature towards stabilisation in its tracking issue.