Remove unused lowering field and method#51034
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Remove unused lowering field and method r? @nikomatsakis So while trying to understand lowering better, I found out that there's something related to creating definitions. Analyzing that further, I realized that it is entirely dead code. The `parent_def` field was only ever used for setting and resetting the field itself. The field was never read anywhere else and thus its value was entirely unused. Maybe the `unused_field` lint should detect when the only use of a field is the field being read without using the read value other than writing back to the field? The diff is best viewed without whitespace changes getting in the way: https://github.com/rust-lang/rust/pull/51034/files?w=1
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Rollup of 11 pull requests Successful merges: - #50987 (Underline multiple suggested replacements in the same line) - #51014 (Add documentation about env! second argument) - #51034 (Remove unused lowering field and method) - #51047 (Use AllFacts from polonius-engine) - #51048 (Add more missing examples for Formatter) - #51056 (Mention and use `Once::new` instead of `ONCE_INIT`) - #51059 (What does an expression look like, that consists only of special characters?) - #51065 (Update nomicon link in transmute docs) - #51067 (Add inner links in documentation) - #51070 (Fail typecheck if we encounter a bogus break) - #51073 (Rename TokenStream::empty to TokenStream::new) Failed merges:
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r? @nikomatsakis
So while trying to understand lowering better, I found out that there's something related to creating definitions. Analyzing that further, I realized that it is entirely dead code.
The
parent_deffield was only ever used for setting and resetting the field itself. The field was never read anywhere else and thus its value was entirely unused.Maybe the
unused_fieldlint should detect when the only use of a field is the field being read without using the read value other than writing back to the field?The diff is best viewed without whitespace changes getting in the way: https://github.com/rust-lang/rust/pull/51034/files?w=1