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rust_ast::ast => rustc_ast
Rework of #71199 which is a rework #70621
Still working on this but just made the PR to track progress
r? @Dylan-DPC
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This commit introduces `QPath::LangItem` to the HIR and uses it in AST
lowering instead of constructing a `hir::Path` from a slice of symbols.
This might be better for performance, but is also much cleaner as the
previous approach is fragile. In addition, it resolves a bug (#61019)
where an extern crate imported as "std" would result in the paths
created during AST lowering being resolved incorrectly (or not at all).
Co-authored-by: Matthew Jasper <mjjasper1@gmail.com>
Signed-off-by: David Wood <david@davidtw.co>
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This is important for fields, which are incorrectly referred to as
"items".
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In various ways, such as changing functions to take a `Symbol` instead
of a `&str`.
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(clippy::single_match)
Makes code more compact and reduces nestig.
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even more clippy cleanups
* Don't pass &mut where immutable reference (&) is sufficient (clippy::unnecessary_mut_passed)
* Use more efficient &&str to String conversion (clippy::inefficient_to_string)
* Don't always eval arguments inside .expect(), use unwrap_or_else and closure. (clippy::expect_fun_call)
* Use righthand '&' instead of lefthand "ref". (clippy::toplevel_ref_arg)
* Use simple 'for i in x' loops instead of 'while let Some(i) = x.next()' loops on iterators. (clippy::while_let_on_iterator)
* Const items have by default a static lifetime, there's no need to annotate it. (clippy::redundant_static_lifetimes)
* Remove redundant patterns when matching ( x @ _ to x) (clippy::redundant_pattern)
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anything.
For example: `if let Some(_) = foo() {}` can be reduced to `if foo().is_some() {}` (clippy::redundant_pattern_matching)
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- AnonymousParameters::check_trait_item
- TypeAliasBounds::check_item
- NonSnakeCase::check_snake_case
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- Make report_unsafe take decorate function
- Remove span_lint, replacing calls with struct_span_lint, as caller is
now responsible for emitting.
- Remove lookup_and_emit, replacing with just lookup which takes a
decorate function.
- Remove span_lint_note, span_lint_help. These methods aren't easily
made lazy as standalone methods, private, and unused. If this
functionality is needed, to be lazy, they can easily be made into
Fn(&mut DiagnosticBuilder) that are meant to be called _within_ the
decorate function.
- Rename lookup_and_emit_with_diagnostics to lookup_with_diagnostics to
better reflect the fact that it doesn't emit for you.
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Caller now passes in a `decorate` function, which is only run if the
lint is allowed.
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found via clippy
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Also do some cleanup of the interface.
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