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Bug 20442 – Please add a warning that will complain about unused imports

Status: RESOLVED
Resolution: WONTFIX
Severity: enhancement
Priority: P1
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2019-12-11T03:18:41Z
Last change time: 2019-12-11T12:25:01Z
Assigned to: No Owner
Creator: Manu

Comments

Comment #0 by turkeyman — 2019-12-11T03:18:41Z

Please add an optional warning that will complain about unused imports. I think this could be added to `-w`/`-wi`. We want to have a warning that helps us find and clean up unused imports. It should be trivial to keep a flag against import statements during symbol lookup?

Comment #1 by razvan.nitu1305 — 2019-12-11T11:39:30Z

This has come up in the past and the typical answer was: "This should be implemented as a third party tool using dmd as a library".

Comment #2 by turkeyman — 2019-12-11T11:57:49Z

That's a shit solution. Build systems are way complex enough, and a whole other pass to make a trivial warning is silly when we already have a perfectly good warning solution; `-w`

Comment #3 by greeenify — 2019-12-11T12:25:01Z

Yes, Walter consistently rejected such proposals. Before this can be tracked as an issue, it needs to get approval from either Atila or Walter, but as Razvan mentioned there are many precedents for rejections, I sadly have to close this as WONTFIX.