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Fix "field is never used" warning to take unions into account #36252

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Merged
merged 2 commits into from
Sep 7, 2016

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joshtriplett
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When compiling code containing a union with an unused field, rustc says
"struct field is never used".

Rather than saying "struct or union", or adding logic to determine the
type of the item, just change the message to "field is never used",
dropping the "struct".

Update tests accordingly.

Rather than saying "struct or union" or adding logic to determine the
type of the item, just change the message to "field is never used",
dropping the "struct".

Update tests accordingly.
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Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @Aatch (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

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@sanxiyn
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sanxiyn commented Sep 5, 2016

Maybe add a test containing a union with an unused field?

@joshtriplett
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@sanxiyn Done.

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sanxiyn commented Sep 6, 2016

@bors r+

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bors commented Sep 6, 2016

📌 Commit 046c7f2 has been approved by sanxiyn

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bors commented Sep 6, 2016

⌛ Testing commit 046c7f2 with merge 2c846a7...

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bors commented Sep 6, 2016

💔 Test failed - auto-win-msvc-32-opt

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@bors: retry

On Tue, Sep 6, 2016 at 7:46 AM, bors [email protected] wrote:

💔 Test failed - auto-win-msvc-32-opt
https://buildbot.rust-lang.org/builders/auto-win-msvc-32-opt/builds/4729


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bors commented Sep 7, 2016

⌛ Testing commit 046c7f2 with merge fe278a8...

bors added a commit that referenced this pull request Sep 7, 2016
Fix "field is never used" warning to take unions into account

When compiling code containing a union with an unused field, rustc says
"struct field is never used".

Rather than saying "struct or union", or adding logic to determine the
type of the item, just change the message to "field is never used",
dropping the "struct".

Update tests accordingly.
@bors bors merged commit 046c7f2 into rust-lang:master Sep 7, 2016
@joshtriplett joshtriplett deleted the union-field-never-used branch July 26, 2017 23:32
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6 participants