Auto merge of #46763 - zackmdavis:and_the_case_of_the_erroneous_field_pattern_ellipsis, r=petrochenkov

in which `..` is suggested for erroneous `...` in struct field patterns

Resolves #46718. Supersedes #46721.

r? @petrochenkov

src/test/ui/did_you_mean/issue-46718-struct-pattern-dotdotdot.rs

@@ -0,0 +1,27 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![allow(unused)]
+
+struct PersonalityInventory {
+    expressivity: f32,
+    instrumentality: f32
+}
+
+impl PersonalityInventory {
+    fn expressivity(&self) -> f32 {
+        match *self {
+            PersonalityInventory { expressivity: exp, ... } => exp
+            //~^ ERROR expected field pattern, found `...`
+        }
+    }
+}
+
+fn main() {}

src/test/ui/did_you_mean/issue-46718-struct-pattern-dotdotdot.stderr

@@ -0,0 +1,8 @@
+error: expected field pattern, found `...`
+  --> $DIR/issue-46718-struct-pattern-dotdotdot.rs:21:55
+   |
+21 |             PersonalityInventory { expressivity: exp, ... } => exp
+   |                                                       ^^^ help: to omit remaining fields, use one fewer `.`: `..`
+
+error: aborting due to previous error
+