> Upon accepting SE-0099, the core team is removing `where` clauses from
> condition clauses, writing "the 'where' keyword can be retired from its
> purpose as a boolean condition introducer."
>
> Inspiried by Xiaodi Wu, I now propose removing `where` clauses from `for in`
> loops, where they are better expressed (and read) as guard conditions.
Do you propose to remove `for case` as well? That can equally be handled by a
`guard case` in the loop body.
Alternate proposal: Move `where` clauses to be adjacent to the pattern—rather
than the sequence expression—in a `for` loop, just as they are in these other
syntaxes.
for n where n.isOdd in 1...1_000 { … }
This makes them more consistent with the syntax in `switch` cases and `catch`
statements, while also IMHO clarifying the role of the `where` clause as a
filter on the elements seen by the loop.
--
Brent Royal-Gordon
Architechies
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