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Emit warnings on unused parens/braces in index expressions

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This commit is contained in:
Aidan Olsen 2023-01-31 16:48:08 -07:00
parent dc1d9d50fb
commit c3a71ede7c
3 changed files with 45 additions and 0 deletions
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4
compiler/rustc_lint/src/unused.rs
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@ -495,6 +495,7 @@ enum UnusedDelimsCtx {
ArrayLenExpr,
AnonConst,
MatchArmExpr,
IndexExpr,
}
impl From<UnusedDelimsCtx> for &'static str {
@ -514,6 +515,7 @@ impl From<UnusedDelimsCtx> for &'static str {
UnusedDelimsCtx::LetScrutineeExpr => "`let` scrutinee expression",
UnusedDelimsCtx::ArrayLenExpr | UnusedDelimsCtx::AnonConst => "const expression",
UnusedDelimsCtx::MatchArmExpr => "match arm expression",
UnusedDelimsCtx::IndexExpr => "index expression",
}
}
}
@ -733,6 +735,8 @@ trait UnusedDelimLint {
(value, UnusedDelimsCtx::ReturnValue, false, Some(left), None)
}
Index(_, ref value) => (value, UnusedDelimsCtx::IndexExpr, false, None, None),
Assign(_, ref value, _) | AssignOp(.., ref value) => {
(value, UnusedDelimsCtx::AssignedValue, false, None, None)
}