1 files changed, 57 insertions, 0 deletions
diff --git a/src/test/ui/pattern/pattern-binding-disambiguation.rs b/src/test/ui/pattern/pattern-binding-disambiguation.rs
new file mode 100644
index 000000000..2e80ea345
--- /dev/null
+++ b/src/test/ui/pattern/pattern-binding-disambiguation.rs
@@ -0,0 +1,57 @@
+struct UnitStruct;
+struct TupleStruct();
+struct BracedStruct{}
+
+enum E {
+    UnitVariant,
+    TupleVariant(),
+    BracedVariant{},
+}
+use E::*;
+
+const CONST: () = ();
+static STATIC: () = ();
+
+fn function() {}
+
+fn main() {
+    let doesnt_matter = 0;
+
+    match UnitStruct {
+        UnitStruct => {} // OK, `UnitStruct` is a unit struct pattern
+    }
+    match doesnt_matter {
+        TupleStruct => {} //~ ERROR match bindings cannot shadow tuple structs
+    }
+    match doesnt_matter {
+        BracedStruct => {} // OK, `BracedStruct` is a fresh binding
+    }
+    match UnitVariant {
+        UnitVariant => {} // OK, `UnitVariant` is a unit variant pattern
+    }
+    match doesnt_matter {
+        TupleVariant => {} //~ ERROR match bindings cannot shadow tuple variants
+    }
+    match doesnt_matter {
+        BracedVariant => {} //~ ERROR match bindings cannot shadow struct variants
+    }
+    match CONST {
+        CONST => {} // OK, `CONST` is a const pattern
+    }
+    match doesnt_matter {
+        STATIC => {} //~ ERROR match bindings cannot shadow statics
+    }
+    match doesnt_matter {
+        function => {} // OK, `function` is a fresh binding
+    }
+
+    let UnitStruct = UnitStruct; // OK, `UnitStruct` is a unit struct pattern
+    let TupleStruct = doesnt_matter; //~ ERROR let bindings cannot shadow tuple structs
+    let BracedStruct = doesnt_matter; // OK, `BracedStruct` is a fresh binding
+    let UnitVariant = UnitVariant; // OK, `UnitVariant` is a unit variant pattern
+    let TupleVariant = doesnt_matter; //~ ERROR let bindings cannot shadow tuple variants
+    let BracedVariant = doesnt_matter; //~ ERROR let bindings cannot shadow struct variants
+    let CONST = CONST; // OK, `CONST` is a const pattern
+    let STATIC = doesnt_matter; //~ ERROR let bindings cannot shadow statics
+    let function = doesnt_matter; // OK, `function` is a fresh binding
+}