1 files changed, 137 insertions, 0 deletions
diff --git a/src/test/ui/closures/2229_closure_analysis/match/patterns-capture-analysis.rs b/src/test/ui/closures/2229_closure_analysis/match/patterns-capture-analysis.rs
new file mode 100644
index 000000000..56f5ac44d
--- /dev/null
+++ b/src/test/ui/closures/2229_closure_analysis/match/patterns-capture-analysis.rs
@@ -0,0 +1,137 @@
+// edition:2021
+
+#![feature(rustc_attrs)]
+
+// Should capture the discriminant since a variant of a multivariant enum is
+// mentioned in the match arm; the discriminant is captured by the closure regardless
+// of if it creates a binding
+fn test_1_should_capture() {
+    let variant = Some(2229);
+    let c =  #[rustc_capture_analysis]
+    //~^ ERROR: attributes on expressions are experimental
+    //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701>
+
+    || {
+    //~^ First Pass analysis includes:
+    //~| Min Capture analysis includes:
+        match variant {
+        //~^ NOTE: Capturing variant[] -> ImmBorrow
+        //~| NOTE: Min Capture variant[] -> ImmBorrow
+            Some(_) => {}
+            _ => {}
+        }
+    };
+    c();
+}
+
+// Should not capture the discriminant since only a wildcard is mentioned in the
+// match arm
+fn test_2_should_not_capture() {
+    let variant = Some(2229);
+    let c =  #[rustc_capture_analysis]
+    //~^ ERROR: attributes on expressions are experimental
+    //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701>
+    || {
+    //~^ First Pass analysis includes:
+        match variant {
+            _ => {}
+        }
+    };
+    c();
+}
+
+// Testing single variant patterns
+enum SingleVariant {
+    Points(u32)
+}
+
+// Should not capture the discriminant since the single variant mentioned
+// in the match arm does not trigger a binding
+fn test_3_should_not_capture_single_variant() {
+    let variant = SingleVariant::Points(1);
+    let c =  #[rustc_capture_analysis]
+    //~^ ERROR: attributes on expressions are experimental
+    //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701>
+    || {
+    //~^ First Pass analysis includes:
+        match variant {
+            SingleVariant::Points(_) => {}
+        }
+    };
+    c();
+}
+
+// Should not capture the discriminant since the single variant mentioned
+// in the match arm does not trigger a binding
+fn test_6_should_capture_single_variant() {
+    let variant = SingleVariant::Points(1);
+    let c =  #[rustc_capture_analysis]
+    //~^ ERROR: attributes on expressions are experimental
+    //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701>
+    || {
+    //~^ First Pass analysis includes:
+    //~| Min Capture analysis includes:
+        match variant {
+            //~^ NOTE: Capturing variant[] -> ImmBorrow
+            //~| NOTE: Capturing variant[(0, 0)] -> ImmBorrow
+            //~| NOTE: Min Capture variant[] -> ImmBorrow
+            SingleVariant::Points(a) => {
+                println!("{:?}", a);
+            }
+        }
+    };
+    c();
+}
+
+// Should not capture the discriminant since only wildcards are mentioned in the
+// match arm
+fn test_4_should_not_capture_array() {
+    let array: [i32; 3] = [0; 3];
+    let c =  #[rustc_capture_analysis]
+    //~^ ERROR: attributes on expressions are experimental
+    //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701>
+    || {
+    //~^ First Pass analysis includes:
+        match array {
+            [_,_,_] => {}
+        }
+    };
+    c();
+}
+
+// Testing MultiVariant patterns
+enum MVariant {
+    A,
+    B,
+    C,
+}
+
+// Should capture the discriminant since a variant of the multi variant enum is
+// mentioned in the match arm; the discriminant is captured by the closure
+// regardless of if it creates a binding
+fn test_5_should_capture_multi_variant() {
+    let variant = MVariant::A;
+    let c =  #[rustc_capture_analysis]
+    //~^ ERROR: attributes on expressions are experimental
+    //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701>
+    || {
+    //~^ First Pass analysis includes:
+    //~| Min Capture analysis includes:
+        match variant {
+        //~^ NOTE: Capturing variant[] -> ImmBorrow
+        //~| NOTE: Min Capture variant[] -> ImmBorrow
+            MVariant::A => {}
+            _ => {}
+        }
+    };
+    c();
+}
+
+fn main() {
+    test_1_should_capture();
+    test_2_should_not_capture();
+    test_3_should_not_capture_single_variant();
+    test_6_should_capture_single_variant();
+    test_4_should_not_capture_array();
+    test_5_should_capture_multi_variant();
+}