let_chains: scrutinee -> head expression.

Author: Centril

Diff for: src/librustc_lint/unused.rs

@@ -313,7 +313,7 @@ impl UnusedParens {
             ast::ExprKind::Let(_, ref expr) => {
                 // FIXME(#60336): Properly handle `let true = (false && true)`
                 // actually needing the parenthesis.
-                self.check_unused_parens_expr(cx, expr, "`let` scrutinee", followed_by_block);
+                self.check_unused_parens_expr(cx, expr, "`let` head expression", followed_by_block);
             }
             _ => {}
         }

Diff for: src/test/ui/lint/lint-unnecessary-parens.rs

@@ -22,8 +22,8 @@ fn main() {
     match (true) { //~ ERROR unnecessary parentheses around `match` head expression
         _ => {}
     }
-    if let 1 = (1) {} //~ ERROR unnecessary parentheses around `let` scrutinee
-    while let 1 = (2) {} //~ ERROR unnecessary parentheses around `let` scrutinee
+    if let 1 = (1) {} //~ ERROR unnecessary parentheses around `let` head expression
+    while let 1 = (2) {} //~ ERROR unnecessary parentheses around `let` head expression
     let v = X { y: false };
     // struct lits needs parens, so these shouldn't warn.
     if (v == X { y: true }) {}

Diff for: src/test/ui/lint/lint-unnecessary-parens.stderr

@@ -40,13 +40,13 @@ error: unnecessary parentheses around `match` head expression
 LL |     match (true) {
    |           ^^^^^^ help: remove these parentheses
 
-error: unnecessary parentheses around `let` scrutinee
+error: unnecessary parentheses around `let` head expression
   --> $DIR/lint-unnecessary-parens.rs:25:16
    |
 LL |     if let 1 = (1) {}
    |                ^^^ help: remove these parentheses
 
-error: unnecessary parentheses around `let` scrutinee
+error: unnecessary parentheses around `let` head expression
   --> $DIR/lint-unnecessary-parens.rs:26:19
    |
 LL |     while let 1 = (2) {}