Empty is mentioned but not explained

[gfldex]

• [x] Empty is a very special value not just in for loops. Yet the docs don't explain what it does at all. At least in /language/control there should be a link to its definition.

• [x] Also there is no note what loop constructs do on undefined values.

• [ ] There may be the related issue of binding on returned values when there is no container in /type/Nil and /type/Routine .

[JJ]

We should definitely do something. Thanks for the report.

[lizmat]

Maybe expand the section at https://docs.perl6.org/type/Slip#constant_Empty and refer to there from everywhere in the docs where Empty is mentioned?

[JJ]

We'll try to do that too, but actually the first part of the OP was kinda solved; the second paragraph is the done I'm kind of lost about.

[rafaelschipiura]

@gfldex Could you clarify what you mean by the last paragraph?

[lizmat]

/me hates dual issue issues :-)