Rollup merge of #87158 - In-line:suggest-full-enum-variant-for-local-module, r=estebank

Suggest full enum variant for local modules

src/test/ui/suggestions/suggest-full-enum-variant-for-local-module.rs

@@ -0,0 +1,10 @@
+mod option {
+    pub enum O<T> {
+        Some(T),
+        None,
+    }
+}
+
+fn main() {
+    let _: option::O<()> = (); //~ ERROR 9:28: 9:30: mismatched types [E0308]
+}

src/test/ui/suggestions/suggest-full-enum-variant-for-local-module.stderr

@@ -0,0 +1,16 @@
+error[E0308]: mismatched types
+  --> $DIR/suggest-full-enum-variant-for-local-module.rs:9:28
+   |
+LL |     let _: option::O<()> = ();
+   |            -------------   ^^
+   |            |               |
+   |            |               expected enum `O`, found `()`
+   |            |               help: try using a variant of the expected enum: `option::O::Some(())`
+   |            expected due to this
+   |
+   = note:   expected enum `O<()>`
+           found unit type `()`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.