Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 69 insertions, 0 deletions

diff --git a/tests/ui/pattern/usefulness/match-arm-statics.rs b/tests/ui/pattern/usefulness/match-arm-statics.rs
new file mode 100644
index 000000000..91db76ebb
--- /dev/null
+++ b/tests/ui/pattern/usefulness/match-arm-statics.rs
@@ -0,0 +1,69 @@
+#![allow(dead_code)]
+#![deny(unreachable_patterns)]
+
+use self::Direction::{North, East, South, West};
+
+#[derive(PartialEq, Eq)]
+struct NewBool(bool);
+
+#[derive(PartialEq, Eq)]
+enum Direction {
+    North,
+    East,
+    South,
+    West
+}
+
+const TRUE_TRUE: (bool, bool) = (true, true);
+
+fn unreachable_1() {
+    match (true, false) {
+        TRUE_TRUE => (),
+        (false, false) => (),
+        (false, true) => (),
+        (true, false) => (),
+        (true, true) => ()
+        //~^ ERROR unreachable pattern
+    }
+}
+
+const NONE: Option<Direction> = None;
+const EAST: Direction = East;
+
+fn unreachable_2() {
+    match Some(Some(North)) {
+        Some(NONE) => (),
+        Some(Some(North)) => (),
+        Some(Some(EAST)) => (),
+        Some(Some(South)) => (),
+        Some(Some(West)) => (),
+        Some(Some(East)) => (),
+        //~^ ERROR unreachable pattern
+        None => ()
+    }
+}
+
+const NEW_FALSE: NewBool = NewBool(false);
+struct Foo {
+    bar: Option<Direction>,
+    baz: NewBool
+}
+
+fn unreachable_3() {
+    match (Foo { bar: Some(EAST), baz: NewBool(true) }) {
+        Foo { bar: None, baz: NewBool(true) } => (),
+        Foo { bar: _, baz: NEW_FALSE } => (),
+        Foo { bar: Some(West), baz: NewBool(true) } => (),
+        Foo { bar: Some(South), .. } => (),
+        Foo { bar: Some(EAST), .. } => (),
+        Foo { bar: Some(North), baz: NewBool(true) } => (),
+        Foo { bar: Some(EAST), baz: NewBool(false) } => ()
+        //~^ ERROR unreachable pattern
+    }
+}
+
+fn main() {
+    unreachable_1();
+    unreachable_2();
+    unreachable_3();
+}