1 files changed, 23 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/source/existential_type.rs b/src/tools/rustfmt/tests/source/existential_type.rs
new file mode 100644
index 000000000..33bb9a951
--- /dev/null
+++ b/src/tools/rustfmt/tests/source/existential_type.rs
@@ -0,0 +1,23 @@
+// Opaque type.
+
+    #![feature(type_alias_impl_trait)]
+
+pub type Adder<F, T>
+where
+    T: Clone,
+    F: Copy
+    = impl Fn(T) -> T;
+
+pub type Adderrr<T> = impl Fn(  T  ) -> T;
+
+impl Foo for Bar {
+type E  = impl Trait;
+}
+
+pub type Adder_without_impl<F, T>
+where
+    T: Clone,
+    F: Copy
+    = Fn(T) -> T;
+
+pub type Adderrr_without_impl<T> = Fn(  T  ) -> T;