Add tests for issue rust-lang#67691

Author: sapir

src/test/ui/lint/issue-67691-unused-field-in-or-pattern.fixed

@@ -0,0 +1,61 @@
+// run-rustfix
+
+#![feature(or_patterns)]
+#![deny(unused)]
+
+pub enum MyEnum {
+    A { i: i32, j: i32 },
+    B { i: i32, j: i32 },
+}
+
+pub fn no_ref(x: MyEnum) {
+    use MyEnum::*;
+
+    match x {
+        A { i, j: _ } | B { i, j: _ } => { //~ ERROR unused variable
+            println!("{}", i);
+        }
+    }
+}
+
+pub fn with_ref(x: MyEnum) {
+    use MyEnum::*;
+
+    match x {
+        A { i, j: _ } | B { i, j: _ } => { //~ ERROR unused variable
+            println!("{}", i);
+        }
+    }
+}
+
+pub fn inner_no_ref(x: Option<MyEnum>) {
+    use MyEnum::*;
+
+    match x {
+        Some(A { i, j: _ } | B { i, j: _ }) => { //~ ERROR unused variable
+            println!("{}", i);
+        }
+
+        _ => {}
+    }
+}
+
+pub fn inner_with_ref(x: Option<MyEnum>) {
+    use MyEnum::*;
+
+    match x {
+        Some(A { i, j: _ } | B { i, j: _ }) => { //~ ERROR unused variable
+            println!("{}", i);
+        }
+
+        _ => {}
+    }
+}
+
+pub fn main() {
+    no_ref(MyEnum::A { i: 1, j: 2 });
+    with_ref(MyEnum::A { i: 1, j: 2 });
+
+    inner_no_ref(Some(MyEnum::A { i: 1, j: 2 }));
+    inner_with_ref(Some(MyEnum::A { i: 1, j: 2 }));
+}

src/test/ui/lint/issue-67691-unused-field-in-or-pattern.rs

@@ -0,0 +1,61 @@
+// run-rustfix
+
+#![feature(or_patterns)]
+#![deny(unused)]
+
+pub enum MyEnum {
+    A { i: i32, j: i32 },
+    B { i: i32, j: i32 },
+}
+
+pub fn no_ref(x: MyEnum) {
+    use MyEnum::*;
+
+    match x {
+        A { i, j } | B { i, j } => { //~ ERROR unused variable
+            println!("{}", i);
+        }
+    }
+}
+
+pub fn with_ref(x: MyEnum) {
+    use MyEnum::*;
+
+    match x {
+        A { i, ref j } | B { i, ref j } => { //~ ERROR unused variable
+            println!("{}", i);
+        }
+    }
+}
+
+pub fn inner_no_ref(x: Option<MyEnum>) {
+    use MyEnum::*;
+
+    match x {
+        Some(A { i, j } | B { i, j }) => { //~ ERROR unused variable
+            println!("{}", i);
+        }
+
+        _ => {}
+    }
+}
+
+pub fn inner_with_ref(x: Option<MyEnum>) {
+    use MyEnum::*;
+
+    match x {
+        Some(A { i, ref j } | B { i, ref j }) => { //~ ERROR unused variable
+            println!("{}", i);
+        }
+
+        _ => {}
+    }
+}
+
+pub fn main() {
+    no_ref(MyEnum::A { i: 1, j: 2 });
+    with_ref(MyEnum::A { i: 1, j: 2 });
+
+    inner_no_ref(Some(MyEnum::A { i: 1, j: 2 }));
+    inner_with_ref(Some(MyEnum::A { i: 1, j: 2 }));
+}

src/test/ui/lint/issue-67691-unused-field-in-or-pattern.stderr

@@ -0,0 +1,52 @@
+error: unused variable: `j`
+  --> $DIR/issue-67691-unused-field-in-or-pattern.rs:15:16
+   |
+LL |         A { i, j } | B { i, j } => {
+   |                ^            ^
+   |
+note: the lint level is defined here
+  --> $DIR/issue-67691-unused-field-in-or-pattern.rs:4:9
+   |
+LL | #![deny(unused)]
+   |         ^^^^^^
+   = note: `#[deny(unused_variables)]` implied by `#[deny(unused)]`
+help: try ignoring the field
+   |
+LL |         A { i, j: _ } | B { i, j: _ } => {
+   |                ^^^^            ^^^^
+
+error: unused variable: `j`
+  --> $DIR/issue-67691-unused-field-in-or-pattern.rs:25:16
+   |
+LL |         A { i, ref j } | B { i, ref j } => {
+   |                ^^^^^            ^^^^^
+   |
+help: try ignoring the field
+   |
+LL |         A { i, j: _ } | B { i, j: _ } => {
+   |                ^^^^            ^^^^
+
+error: unused variable: `j`
+  --> $DIR/issue-67691-unused-field-in-or-pattern.rs:35:21
+   |
+LL |         Some(A { i, j } | B { i, j }) => {
+   |                     ^            ^
+   |
+help: try ignoring the field
+   |
+LL |         Some(A { i, j: _ } | B { i, j: _ }) => {
+   |                     ^^^^            ^^^^
+
+error: unused variable: `j`
+  --> $DIR/issue-67691-unused-field-in-or-pattern.rs:47:21
+   |
+LL |         Some(A { i, ref j } | B { i, ref j }) => {
+   |                     ^^^^^            ^^^^^
+   |
+help: try ignoring the field
+   |
+LL |         Some(A { i, j: _ } | B { i, j: _ }) => {
+   |                     ^^^^            ^^^^
+
+error: aborting due to 5 previous errors
+