X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=compiler%2Frustc_lint%2Fsrc%2Funused.rs;h=d829ca43328fe651422bf31ad61ef2e955bbfe9c;hb=beb5cc9cf79b782094bb75fe41df3b7bdbb05bd7;hp=4c9b3df2dbd33d706d04c3cc5e911ceeb9c70a2c;hpb=f55b0022db8dccc6aa6bf3f650b562eaec0fdc54;p=rust.git

diff --git a/compiler/rustc_lint/src/unused.rs b/compiler/rustc_lint/src/unused.rs
index 4c9b3df2dbd..d829ca43328 100644
--- a/compiler/rustc_lint/src/unused.rs
+++ b/compiler/rustc_lint/src/unused.rs
@@ -495,6 +495,7 @@ enum UnusedDelimsCtx {
     ArrayLenExpr,
     AnonConst,
     MatchArmExpr,
+    IndexExpr,
 }
 
 impl From<UnusedDelimsCtx> for &'static str {
@@ -514,6 +515,7 @@ fn from(ctx: UnusedDelimsCtx) -> &'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 @@ fn check_expr(&mut self, cx: &EarlyContext<'_>, e: &ast::Expr) {
                 (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)
             }