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Fix #[expect] for needless_borrow, ref_binding_to_ref

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xFrednet 2022-06-06 11:51:36 +02:00
parent 3e771624e1
commit a613460e8a
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6 changed files with 75 additions and 42 deletions
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45
clippy_lints/src/dereference.rs
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@ -1,4 +1,4 @@
use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then};
use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_hir_and_then};
use clippy_utils::source::{snippet_with_applicability, snippet_with_context};
use clippy_utils::sugg::has_enclosing_paren;
use clippy_utils::ty::peel_mid_ty_refs;
@ -131,6 +131,7 @@ pub struct Dereferencing {
struct StateData {
/// Span of the top level expression
span: Span,
hir_id: HirId,
}
enum State {
@ -165,6 +166,8 @@ struct RefPat {
app: Applicability,
/// All the replacements which need to be made.
replacements: Vec<(Span, String)>,
/// The [`HirId`] that the lint should be emitted at.
hir_id: HirId,
}
impl<'tcx> LateLintPass<'tcx> for Dereferencing {
@ -218,7 +221,10 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing {
is_final_ufcs: matches!(expr.kind, ExprKind::Call(..)),
target_mut,
},
StateData { span: expr.span },
StateData {
span: expr.span,
hir_id: expr.hir_id,
},
));
},
RefOp::AddrOf => {
@ -290,7 +296,10 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing {
required_precedence,
msg,
},
StateData { span: expr.span },
StateData {
span: expr.span,
hir_id: expr.hir_id,
},
));
}
},
@ -383,6 +392,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing {
spans: vec![pat.span],
app,
replacements: vec![(pat.span, snip.into())],
hir_id: pat.hir_id
}),
);
}
@ -395,13 +405,15 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing {
for pat in self.ref_locals.drain(..).filter_map(|(_, x)| x) {
let replacements = pat.replacements;
let app = pat.app;
span_lint_and_then(
let lint = if pat.always_deref {
NEEDLESS_BORROW
} else {
REF_BINDING_TO_REFERENCE
};
span_lint_hir_and_then(
cx,
if pat.always_deref {
NEEDLESS_BORROW
} else {
REF_BINDING_TO_REFERENCE
},
lint,
pat.hir_id,
pat.spans,
"this pattern creates a reference to a reference",
|diag| {
@ -638,19 +650,14 @@ fn report<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>, state: State, data: S
} => {
let mut app = Applicability::MachineApplicable;
let snip = snippet_with_context(cx, expr.span, data.span.ctxt(), "..", &mut app).0;
span_lint_and_sugg(
cx,
NEEDLESS_BORROW,
data.span,
msg,
"change this to",
if required_precedence > expr.precedence().order() && !has_enclosing_paren(&snip) {
span_lint_hir_and_then(cx, NEEDLESS_BORROW, data.hir_id, data.span, msg, |diag| {
let sugg = if required_precedence > expr.precedence().order() && !has_enclosing_paren(&snip) {
format!("({})", snip)
} else {
snip.into()
},
app,
);
};
diag.span_suggestion(data.span, "change this to", sugg, app);
});
},
}
}